Zone 160, Master Map
+16°00'
Normal View
Zone Master, Normal View, 10 deg FOV
+14°00'
ν
ξ
f
i
c
ξ
+12°00'
Gemini
Monoceros
Orion
g
d
Christmas Tree Cluster
+10°00'
j
Cone Nebula
µ
+08°00'
Hubble's Variable Nebula
e
h
+06°00'
k
Rosette Nebula
ε
06h 56m
06h 48m
06h 40m
06h 32m
06h 24m
06h 16m
06h 08m
06h 00m
Zone 160, Map 1
Normal Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
ν
STF 877
A. G. 321
South 509
Xi Ori
+14°00'
ξ
STF 844
STF 848
Hough 230
NGC 2169
OSS 73
+13°00'
Barton 1188
NGC 2194
STF 892 rej
74 Ori
+12°00'
STF 891
OSS 71
A. G. 324
STF 853
06h 18m
06h 12m
06h 06m
06h 00m
Zone 160, Map 1
Mirror Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
ν
A. G. 321
STF 877
ξ
Xi Ori
STF 844
NGC 2169
STF 848
Hough 230
+14°00'
South 509
OSS 73
+13°00'
Barton 1188
NGC 2194
STF 892 rej
OSS 71
STF 853
06h 00m
06h 06m
06h 12m
06h 18m
STF 891
+12°00'
74 Ori
Zone 160, Map 2
Normal Image
+12°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
OSS 71
A. G. 324
+11°00'
STF 853
STF 840
STF 880
+10°00'
NGC 2141
75 Ori
Jonckheere 407
h725
µ
Mu Ori
+09°00'
Hough 24
Tycho 241
06h 18m
06h 12m
06h 06m
06h 00m
Zone 160, Map 2
Mirror Image
+12°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
OSS 71
+11°00'
STF 853
STF 840
STF 880
+10°00'
NGC 2141
75 Ori
Jonckheere 407
Mu Ori µ
+09°00'
Hough 24
06h 00m
06h 06m
06h 12m
06h 18m
Zone 160, Map 3
Normal Image
+08°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Chevalier
+07°00'
STF 852
STF 856
NGC 2202
+06°00'
A 2717
STF 885
NGC 2143
STF 854
STF 895 rej
STF 859
NGC 2186
Engelmann 26
Baillaud 2658
06h 18m
06h 12m
NGC 2180
06h 06m
06h 00m
Zone 160, Map 3
Mirror Image
+08°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Chevalier
+07°00'
STF 852
STF 856
STF 885
NGC 2202
NGC 2143
STF 854
STF 859
NGC 2186
Engelmann 26
Baillaud 2658
NGC 2180
06h 00m
06h 06m
06h 12m
06h 18m
+06°00'
A 2717
Zone 160, Map 4
Normal Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
A. G. 327
STF 932
+14°00'
A 2720
Jonckheere 2742
A. G. 325
+13°00'
Jonckheere 1951
STF 892 rej
South 529
STF 891
+12°00'
Gemini
OS 146 rej
A. G. 324
Monoceros
Smart 60
STF 921
06h 36m
06h 30m
06h 24m
Zone 160, Map 4
Mirror Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
A. G. 327
STF 932
+14°00'
A 2720
Jonckheere 2742
A. G. 325
Jonckheere 1951
Hough 230
+13°00'
OSS 73
STF 892 rej
STF 891
South 529
+12°00'
Gemini
A. G. 324
Monoceros
OS 146 rej
Smart 60
STF 921
06h 24m
06h 30m
06h 36m
Zone 160, Map 5
Normal Image
+12°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
A. G. 324
Monoceros
OS 146 rej
Smart 60
+11°00'
STF 921
STF 898
NGC 2259
STF 901
Orion
+10°00'
Abetti 5
NGC 2245
A 2816
Collinder 95
STF 951
h725
Trumpler 5
STF 953
h726
Hubble's Variable Nebula
NGC 2261
A. G. 114
NGC 2251
06h 36m
STF 930 rej
STF 931 j
06h 30m
06h 24m
Tycho 241
+09°00'
STF 954
Zone 160, Map 5
Mirror Image
A. G. 324
Monoceros
+12°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
OS 146 rej
Smart 60
STF 898
NGC 2259
+11°00'
STF 921
STF 901
Orion
Collinder 95
+10°00'
Abetti 5
NGC 2245
A 2816
h725
+09°00'
Trumpler 5
Tycho 241
h726
NGC 2261
A. G. 114
NGC 2251
STF 931 rej
06h 24m
06h 30m
STF 930 rej
06h 36m
Zone 160, Map 6
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Hubble's Variable Nebula
NGC 2261
A. G. 114
+08°00'
NGC 2251
STF 930 rej
STF 931 rej
NGC 2254
14 Mon
+07°00'
13 Mon
OS 142
Collinder 111
Collinder 106
+06°00'
NGC 2236
Collinder 97
STF 949
STF 895 rej
STF 926
NGC 2252
STF 915
STF 939
Collinder 92
NGC 2237
Collinder 104
06h 36m
Anderson 3
Rosette Nebula
Baillaud 2666
NGC 2239 NGC 2244
Baillaud 2669
06h 30m
06h 24m
Zone 160, Map 6
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 2261
A. G. 114
STF 931 rej
+08°00'
NGC 2251
STF 930 rej
NGC 2254
14 Mon
Collinder 111
NGC 2236
Collinder 106
Collinder 97
STF 926
STF 895 rej
NGC 2252
STF 939
STF 915
NGC 2239
Collinder 92
06h 24m
NGC 2237
NGC 2244
Rosette Nebula
Baillaud 2666 Baillaud 2669
Anderson 3
06h 30m
06h 36m
Collinder 104
+06°00'
OS 142
+07°00'
13 Mon
Zone 160, Map 7
Normal Image
Kustner 27
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Hough 239
+14°00'
OSS 80
STF 959
+13°00'
30 Gem
38 Gem
ξ
Jonckheere 273
+12°00'
STF 1007 rej
Xi Gem
07h 00m
06h 54m
06h 48m
06h 42m
Zone 160, Map 7
Mirror Image
Kustner 27
Hough 239
+14°00'
OSS 80
STF 959
30 Gem
+13°00'
38 Gem
Xi Gem ξ
Jonckheere 273
+12°00'
A. G. 327
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
06h 42m
06h 48m
06h 54m
07h 00m
Zone 160, Map 8
Normal Image
+11°00'
STF 995
+12°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+10°00'
STF 965
NGC 2264
Christmas Tree Cluster
Cone Nebula
Dembowski 11
STF 952
STF 3118
STF 986
STF 951
15 Mon
STF 954
STF 953
07h 00m
06h 54m
06h 48m
06h 42m
+09°00'
Kustner 92
Zone 160, Map 8
Mirror Image
STF 995
+10°00'
STF 965
NGC 2259
+11°00'
+12°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 2264
Christmas Tree Cluster
STF 951
15 Mon
Cone Nebula
Dembowski 11
STF 952
STF 3118
STF 986
+09°00'
STF 954
STF 953
Hubble's Variable Nebula
NGC 2261
06h 42m
06h 48m
06h 54m
07h 00m
Zone 160, Map 9
Normal Image
+08°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+07°00'
Jonckheere 666
Jonckheere 2009
+06°00'
OSS 79
A 2823
STF 949
h2347
A. G. 121
07h 00m
06h 54m
06h 48m
06h 42m
Zone 160, Map 9
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+08°00'
Hubble's Variable Nebula
NGC 2261
+07°00'
Jonckheere 666
Jonckheere 2009
Collinder 111
+06°00'
OSS 79
A 2823
STF 949
h2347
A. G. 121
06h 42m
06h 48m
06h 54m
07h 00m
Zone 160, Map 10
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque, Inc.
Dembowski 11
Cone Nebula
Christmas Tree Cluster
15 Mon
STF 951
NGC 2264
STF 952
STF 3118
STF 954
Zone 160, Map 10
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque, Inc.
15 Mon
STF 951
NGC 2264
STF 952
STF 3118
STF 954
Trumpler 5
Dembowski 11
Cone Nebula
Christmas Tree Cluster
Zone 160
4 Reference Stars, 76 Double Stars,
3 Bright Nebulae, 18 Open Clusters
Flamsteed
D
13 Mon................................................. 36
14 Mon................................................. 39
15 Mon................................................. 55
30 Gem ................................................ 49
38 Gem ................................................ 46
74 Ori..................................................... 8
75 Ori................................................... 13
Dembowski 11 ..................................... 57
E
Engelmann 26 ...................................... 20
H
h2347 ................................................... 53
h725 ..................................................... 29
h726 ..................................................... 30
Hough 230............................................ 10
Hough 239............................................ 48
Hough 24.............................................. 14
A
A 2717 ................................................. 19
A 2720 ................................................. 25
A 2816 ................................................. 28
A 2823 ................................................. 54
A. G. 114 ............................................. 31
A. G. 321 ............................................... 4
A. G. 324 ............................................. 15
A. G. 325 ............................................. 23
A. G. 327 ............................................. 24
Abetti 5 ................................................ 30
J
B
Jonckheere 1951 .................................. 25
Jonckheere 2009 .................................. 52
Jonckheere 273 .................................... 48
Jonckheere 2742 .................................. 24
Jonckheere 407 .................................... 15
Jonckheere 666 .................................... 55
Barton 1188 ........................................... 5
K
C
Kustner 27............................................ 47
Chevalier.............................................. 20
Collinder 106 ....................................... 42
Collinder 111 ....................................... 43
Collinder 92 ......................................... 43
Collinder 95 ......................................... 34
Collinder 97 ......................................... 41
M
Mu Ori.................................................. 12
N
NGC 2141 ............................................ 16
NGC 2143 ............................................ 21
NGC 2169 ............................................ 10
NGC 2186 ............................................ 22
-1-
Zone 160
NGC 2194............................................ 11
NGC 2202............................................ 21
NGC 2236............................................ 44
NGC 2237............................................ 45
NGC 2245............................................ 34
NGC 2251............................................ 40
NGC 2252............................................ 44
NGC 2259............................................ 35
NGC 2261............................................ 32
NGC 2264............................................ 59
STF 877.................................................. 3
STF 880................................................ 12
STF 885................................................ 18
STF 891.................................................. 6
STF 892 rej ............................................ 8
STF 895 rej .......................................... 38
STF 898................................................ 27
STF 901................................................ 27
STF 915................................................ 37
STF 921................................................ 28
STF 926................................................ 36
STF 930 rej .......................................... 38
STF 931 rej .......................................... 39
STF 932................................................ 26
STF 939................................................ 37
STF 949................................................ 54
STF 951................................................ 56
STF 952................................................ 57
STF 953................................................ 50
STF 954................................................ 58
STF 959................................................ 47
STF 965................................................ 50
STF 986................................................ 51
STF 995................................................ 52
O
OS 142 ................................................. 40
OS 146 rej............................................ 29
OSS 71................................................... 5
OSS 73................................................... 6
OSS 79................................................. 53
OSS 80................................................. 47
S
Smart 60............................................... 32
South 509............................................... 7
South 529............................................. 23
STF 3118 ............................................. 58
STF 840 ............................................... 13
STF 844 ................................................. 5
STF 848 ................................................. 9
STF 852 ............................................... 19
STF 853 ................................................. 4
STF 854 ............................................... 17
STF 856 ............................................... 18
STF 859 ............................................... 17
T
Trumpler 5 ........................................... 34
Tycho 241 ............................................ 31
X
Xi Gem................................................. 46
Xi Ori ..................................................... 3
-2-
Zone 160
Zone 160, Map 1
Reference Star
Xi Ori (70 Ori; Jonckheere 2016; HD 42560; SAO 95362)
Position: 0612+1412
Mag : 4.50
Spectrum : B3 IV
Color : W
Assumed distance: 630 light years
Assumed luminosity (suns): 501
Notes:
Star A is a spectroscopic binary with a 45.10 day period. It is a member of the
Pleiades Group, and rotates at 223 kps.
Double Stars
Easy
STF 877
Rating: 2 E
ADS 4840; HD 43044; SAO 95431
Position: 0615+1435
A
B
Magnitude
7.02
7.30
Separation PA
—
—
5.7 +
264 =
Year
—
1991
Spectra
B9 V
Colors
W
W
Notes:
1822: 5.6 @ 264. 40 measurements. Star B is a spectroscopic binary.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.60 inches.
Separation: AB = 26.2 miles.
Distance (LY): 2,950
Total luminosity (Suns): 1,940
-3-
Zone 160
A. G. 321
Rating: 3 E
HD 41401; SAO 95215
Position: 0605+1435
A
B
Magnitude
7.71
8.85
Separation PA
—
—
36.1 188 +
Year
—
1991
Spectra
F0
Colors
yW
O
Notes:
1894: 37.2 @ 187. 10 measurements. The stars show similar proper motions.
Observations:
C8 at 83x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.2 inches.
Separation: AB = 9.00 miles.
Distance (LY): 160
Total luminosity (Suns): 1.6
STF 853
Rating: 3 E
HD 42071; SAO 95294
Position: 0609+1140
A
B
Magnitude
8.42
8.96
Separation PA
—
—
35.7 +! 5 +
Year
—
1991
Spectra
G5
G5
Colors
W
W
Notes:
1830: 24.1 @ 340. 34 measurements. Differences in distance per Hipparcos; may be
an optical pair. Different proper motions, too.
Observations:
C8 at 104x. A 10.5m star is 90" away in PA 180.2.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 19.9 inches; B = 20.5 inches.
Separation: AB = 24.0 miles.
Distance (LY): 430
Total luminosity (Suns): 13,400
-4-
Zone 160
Barton 1188
Position: 0600+1313
A
B
Magnitude
10.16
10.35
Rating: 4 E
Separation PA
—
—
5.2 353 -?
Year
—
1935
Spectra
Colors
?
?
Notes:
1908: 5.8 @ 178. 2 measurements. Quadrant reversal?
Observations:
C8 at 104x. It is the N-most star in a chain of three 9m stars.
Distance (LY): 66
Total luminosity (Suns): 0.12
STF 844
Rating: 4 E
HD 41909; SAO 95272
Position: 0608+1400
A
B
Magnitude
8.40
9.30
Separation PA
—
—
23.7 +
9+
Year
—
1917
Spectra
B5
Colors
W
Y
Notes:
1830: 23.6 @ 6. 12 measurements. The stars show similar proper motions.
Observations:
C8 at 104x. It lies in the NW quadrant of the open cluster NGC 2169.
OSS 71
Rating: 4 E
HD 3020; SAO 95425
Position: 0614+1148
A
B
Magnitude
7.12
7.64
Separation PA
—
—
89.3 311 +
Notes:
1875: 89.5 @ 310. 17 measurements.
-5-
Year
—
1995
Spectra
K0
A0
Colors
Y
bW
Zone 160
The stars share common proper motion. However, Hipparcos shows different
distances (910 and 7,100 light years).
Observations:
C8 at 104x. Very rich field.
OSS 73
Rating: 4 E
ADS 4924; HD 43931; SAO 95534
Position: 0619+1326
A
B
Magnitude
6.54
7.67
Separation PA
—
—
72.4 44 =
Year
—
1995
Spectra
F7 V
K1 V
Colors
W
Y
Notes:
1875: 73.3 @ 44. 18 measurements.
The stars share common proper motion. However, Hipparcos shows different
distances (281 and 1,730 light years).
The B star is a spectroscopic binary.
Observations:
C8 at 104x. Note the nice little chain of 11m stars 15 min to the E.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.90 inches; B = 27.7 inches.
Separation: AB = 31.7 miles.
Distance (LY): 281
Total luminosity (Suns): 16
STF 891
Rating: 4 E
ADS 4939; HD 43983; SAO 95540
Position: 0620+1217
A
B
Magnitude
7.67
11.20
Separation PA
—
—
21.9 =
293 +
Notes:
1830: 21.9 @ 292. 8 measurements.
-6-
Year
—
1931
Spectra
B8 V
Colors
yW
?
Zone 160
Observations:
C8 at 104x. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.2 inches.
Separation: AB = 35.9 miles.
Distance (LY): 1,050
Total luminosity (Suns): 103
South 509
Rating: 5 E
ADS 4835; HD 42955; SAO 95417
Position: 0614+1429
A
B
C
BC
Magnitude
7.27
7.96
11.40
Separation PA
—
—
170.5 +
198 =
3.1 +
245 -
Year
—
1991
1991
1991
Spectra
A1 V
A5 V
Colors
W
W
No
Notes:
AB 1825: 169.8 @ 198. 6 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. Also different proper motions.
BC 1884: 2.8 @ 249. 5 measurements.
Observations:
C8 at 104x. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.70 inches; B = 7.50 inches.
Separation: AB = 346 miles; BC = 6.29 miles.
Distance (LY): 1,300
Total luminosity (Suns): 285
-7-
Zone 160
74 Ori
Kuiper 26 (B); Lau 1; HD 43386; SAO 95476
Position: 0616+1216
A
B
C
Magnitude
5.04
12.50
9.30
Separation
—
29.7 +
205.2 +
PA
—
171 +
92 +
Rating: 5 E
Year
—
1989
1956
Spectra
F5 IV-V
Colors
W
No
W
Notes:
AB 1958: 24.0 @ 163. 2 measurements.
AC 1909: 204 @ 88. 3 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.32 inches.
Separation: AB = 2.96 miles; AC = 20.5 miles.
Distance (LY): 64
Total luminosity (Suns): 3.27
STF 892 rej
Position: 0620+1220
A
B
Magnitude
10.50
11.50
Rating: 5 E
Separation PA
—
—
30.0
48
Year
—
1831
Notes:
1 measurement.
Observations:
C11 at 115x. Swamped by a moderately rich field.
-8-
Spectra
Colors
W
W?
Zone 160
Moderate
STF 848
Rating: 2 M
ADS 4728; HD 41943; SAO 95282
Position: 0608+1358
A
B
C
D
E
Magnitude
6.93
7.83
11.00
8.70
9.19
Separation
—
2.4 =
15.9 +
28.3 43.3 +
PA
—
111 +
297 +
122 +
184 +
Year
—
1997
1987
1991
1987
Spectra
B2 V
Colors
W
V
?
?
W
Notes:
AB 1831: 2.4 @ 109. 53 measurements.
AC 1844: 15.0 @ 295. 10 measurements.
AD 1830: 28.6 @ 183. 18 measurements.
AE 1830: 43.1 @ 183. 18 measurements.
Aa (11.60m) 1932: 14.5 @ 204. 1 measurement.
All the following components were added by George Abt:
AB-F (10.92m) 1987: 64.5 @ 180. 1 measurement.
AB-G (11.83m) 1987: 61.5 @ 154. 1 measurement.
AB-H (9.93m) 1987: 82.5 @ 114. 1 measurement.
AB-I (10.93m) 1987: 100.3 @ 209. 1 measurement.
AB-J (10.83m) 1987: 127.0 @ 227. 1 measurement.
Observations:
C8 at 206x. It lies in the NE quadrant of the open cluster NGC 2169. Very, very rich
field.
None of the Abt components were sought or confirmed.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.2 inches.
Separation: AB = 4.56 miles; AC = 30.3 miles; AD = 53.9 miles; AE = 82.3
miles; AF = 123 miles; AG = 117 miles; AH = 157 miles; AI = 191 miles; AJ = 242
miles.
Distance (LY): 1,220
Total luminosity (Suns): 273
-9-
Zone 160
Hough 230
Rating: 3 M
ADS 4919; HD 43820; SAO 95518
Position: 0619+1347
A
B
Magnitude
8.39
9.90
Separation PA
—
—
1.7 +
63 +
Year
—
1991
Spectra
A2 Ib
Colors
W
W
Notes:
1887: 1.2 @ 52. 14 measurements.
Observations:
C11 at 339x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11 feet.
Separation: AB = 3.76 miles.
Distance (LY): 1,420
Total luminosity (Suns): 87
Deep Sky Objects
Moderate
NGC 2169
Rating: 5 M
Other Names: Collinder 83; H VIII 24
Astronomical League Program: Herschel 400 Club, Urban Deep Sky Club, Binocular
Deep Sky Club
Position: 0608+1357
Type: Oc
Dimensions: 6'
Class: III 3m
Cluster population: 30
Magnitude: 5.9
Notes:
This group is 12 million years old, so it contains lots of early stars (the earliest being
B1 types; there are also two Beta Cep types and one Ap).
- 10 -
Zone 160
It lies 31,000 light years from the galactic center and 150 light years below the
galactic plane.
Observations:
C8 at 47x. Distinct diamond shape, but sparse and poor. I counted 6 bright stars, 10
fainter ones. Steve Coe, the prolific observer from Phoenix, Arizona, says that the
brighter stars form the numerals "3" and "7", and that it is a shame Messier did not make
this one number 37 on his list. The brightest star (7m, 1,600 times brighter than the Sun)
is a close double. There are two neat orange stars on the W side. It also contains a close
pair, according to Hartung: 7.3m and 8.0m, 2.6" @ 110.
Model (where the Sun is a baseball):
Its diameter would be 1,460 miles, and its stars would be 233 miles apart
Distance (LY): 3,430
Luminosity (suns): 4,000
Difficult
NGC 2194
Other Names: H VI 5; Melotte 43; Collinder 87; Raab 33
Astronomical League Program: Herschel 400 Club
Rating: 4 D
Position: 0614+1248
Type: Oc
Dimensions: 10'
Class: II 2r
Cluster population: 100
Magnitude: 8.5
Notes:
It is about 327 million years old. Modern surveys show at least 194 members of this
cluster. The brightest star is 12.1m (30 times brighter than the Sun).
It is 36,000 light years from the galactic center and 350 light years below the galactic
plane.
Observations:
C8 at 104x. Very faint and grainy, it looks oval. Use high powers, where you should
get a semi-resolved view. To Barbara Wilson, the prolific Texas Herschel Club observer,
it looks like a crab (but then, she was using a 17.5" scope at the time!). The cluster's long
axis runs NE-SW.
- 11 -
Zone 160
Model (where the Sun is a baseball):
Its diameter would be 4,870 miles, with its stars 520 miles apart
Distance (LY): 12,330
Luminosity (suns): 4,700
Zone 160, Map 2
Reference Star
Mu Ori (61 Ori; A2715; HD 40932; SAO 113389)
Position: 0602+0939
Mag : 4.12
Spectrum : A2 V+F3 V Color : W
Assumed distance: 152 light years
Assumed luminosity (suns): 42
Notes:
This star is a member of the Hyades cluster and is a spectroscopic binary with a
period of 18.25 years.
Double Stars
Easy
STF 880
Rating: 2 E
ADS 4862; SAO 95453
Position: 0616+1035
A
B
Magnitude
8.40
8.71
Separation PA
—
—
5.6 +
55 +
Year
—
1992
Spectra
G5
Colors
B!
R!
Notes:
1829: 5.4 @ 53. 33 measurements. The stars share a small common proper motion.
Observations:
C8 at 104x.
- 12 -
Zone 160
STF 840
Rating: 3 E
ADS 4687; HD 41580; SAO 95234
Position: 0606+1045
A
B
C
BC
Magnitude
7.19
9.73
10.10
Separation PA
—
—
21.5 +
248 +
0.4 -
126 -!!
Year
—
1991
Spectra
A0 V
F0
Colors
W
B
No
1997
Notes:
AB 1830: 21.2 @ 247. 31 measurements.
BC 1830: 0.9 @ 184. 34 measurements.
The stars all share common proper motion.
Observations:
C8 at 104x. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches; B = 11.5 inches.
Separation: AB = 20.8 miles; BC = 2,044 feet.
Distance (LY): 620
Total luminosity (Suns): 44
75 Ori
Rating: 4 E
Jonckheere 408; Finsen 331; Bur 96; ADS 4890; HD 43525; SAO 113675
Position: 0617+0956
A
B
C
D
CD
Magnitude
5.39
10.10
10.08
10.90
Separation
—
63.0 +
114.2 5.1 +
PA
—
260 +
349 +?
Year
—
1959
1991
228 +
1979
- 13 -
Spectra
A2 V
Colors
Y
?
?
?
Zone 160
Notes:
AB 1892: 62.9 @ 256. 5 measurements. The primary is an extremely close binary
with an orbital period of 8.7 years (Dommanget, 1977). (But Finsen, in 1978, gave 9.0
years.) It also spins at 192 kps.
AC 1892: 119.9 @ 160. 8 measurements. Quadrant reversal?
CD 1877: 4.7 @ 227. 10 measurements.
Observations:
C8 at 104x. I thought the pa of AC was closer to 90 degrees.
Extremely rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 25.0 miles; AC = 45.3 miles; Aa = 114 feet.
Distance (LY): 254
Total luminosity (Suns): 42.2
Hough 24
Rating: 5 E
ADS 4903; HD 53202; SAO 114866
Position: 0618+0919
A
B
C
D
E
Magnitude
7.46
11.17
13.00
12.60
13.10
Separation
—
4.1 25.0
30.2
45.0
PA
—
157 +
227
353
20
Year
—
1991
1926
1926
1926
Spectra
F5
Colors
W
No
No
?
No
Notes:
AB 1884: 4.6 @ 156. 10 measurements.
AC, AD and AE 1 measurement.
Observations:
C8 at 104x. Rich and faint field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.6 inches.
Separation: AB = 5.31 miles; AC = 32.4 miles; AD = 39.1 miles; AE = 58.3
miles.
Distance (LY): 830
Total luminosity (Suns): 54
- 14 -
Zone 160
Moderate
A. G. 324
Rating: 5 M
ADS 4943; HD 255319; SAO 95545
Position: 0620+1143
A
B
Magnitude
9.33
11.50
Separation PA
—
—
10.2 +
269 =
Year
—
1989
Spectra
A5
Colors
W
W
Notes:
1894: 10.0 @ 269. 3 measurements.
Observations:
C11 at 115x.
Difficult
Jonckheere 407
Rating: 5 D
ADS 4585; HD 40601
Position: 0600+0942
A
B
Magnitude
8.74
10.37
Separation PA
—
—
2.2 +
196 +
Notes:
1911: 1.8 @ 189. 11 measurements.
Observations:
C8 at 280x. Mu Ori is 30 min E.
- 15 -
Year
—
1991
Spectra
G5
Colors
W
W
Zone 160
Deep Sky Objects
Difficult
NGC 2141
Other Names: Collinder 79
Rating: 4 D
Position: 0603+1026
Type: Oc
Dimensions: 8'
Class: II 3r
Cluster population: 100
Magnitude: 10.8
Notes:
It is believed to be about 4 billion years old.
The brightest star is 13.3m (41 times brighter than the Sun).
Observations:
C8 at 104x. The cluster has an M shape and is largely unresolved.
Model (where the Sun is a baseball):
Its diameter would be 10,490 miles, with its stars 1,110 miles apart.
Distance (LY): 14,000
Luminosity (suns): 770
- 16 -
Zone 160
Zone 160, Map 3
Double Stars
Easy
STF 859
Hipparcos 839 (C); HD 42182; SAO 113522
Position: 0610+0540
A
B
C
BC
Magnitude
8.39
8.68
9.52
Separation PA
—
—
43.5 +! 243 0.4
309
Rating: 2 E
Year
—
1991
Spectra
G0
F8
Colors
Y
yW
No
1991
Notes:
AB 1829: 31.4 @ 249. 28 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. The stars have different proper motions.
BC 1 measurement.
Same as STF 863.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.3 inches; B = 15.6 inches.
Separation: AB = 6.65 miles; BC = 323 feet.
Distance (LY): 98
Total luminosity (Suns): 0.58
STF 854
Rating: 3 E
ADS 4736; HD 41999
Position: 0608+0548
A
B
Magnitude
8.81
9.78
Separation PA
—
—
5.5 321 -
- 17 -
Year
—
1992
Spectra
A2
Colors
W
W
Zone 160
Notes:
1832: 5.6 @ 322. 13 measurements. The stars show similar proper motions.
Observations:
C8 at 104x. Two stars (80" apart @ pa 45) lie 10 min SSE. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.41 inches.
Separation: AB = 4.11 miles.
Distance (LY): 480
Total luminosity (Suns): 7
STF 885
Rating: 4 E
ADS 4886; HD 43511; SAO 113671
Position: 0617+0600
A
B
Magnitude
9.00
10.60
Separation PA
—
—
10.1 +
297 +
Year
—
1962
Spectra
A0
Colors
W
B
Notes:
1829: 9.5 @ 296. 12 measurements. The stars share a small common proper motion.
Observations:
C8 at 104x. It is the northernmost star of a trapezium. A 7.5m W star is 15 min W.2
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.49 inches.
Separation: AB = 6.85 miles.
Distance (LY): 435
Total luminosity (Suns): 5
STF 856
Rating: 5 E
ADS 4748; HD 42090; SAO 113513
Position: 0609+0703
A
B
Magnitude
8.52
10.95
Separation PA
—
—
10.3 =
50 +
- 18 -
Year
—
1991
Spectra
A0
Colors
W
R
Zone 160
Notes:
1831: 10.3 @ 47. 15 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical. However, the stars show similar proper motion.
Observations:
C8 at 104x. Very faint. There are many 9m stars in the area— look carefully!
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.32 inches.
Separation: AB = 23.1 miles.
Distance (LY): 1,440
Total luminosity (Suns): 115
Moderate
STF 852
Rating: 5 M
ADS 4735
Position: 0609+0722
A
B
C
Magnitude
10.68
11.70
12.50
Separation
—
10.1 +
44.5 +
PA
—
310 30 +
Year
—
1960
1960
Spectra
Colors
W
W?
W?
Notes:
AB 1830: 9.2 @ 319. 8 measurements.
AC 1870: 44.0 @ 28. 3 measurements.
Observations:
C11 at 115x.
A 2717
Rating: 5 M
ADS 4856; HD 43212
Position: 0615+0631
A
B
C
D
Magnitude
7.69
8.13
13.00
10.57
Separation
—
0.5 +
14.1 +!
38.6
PA
—
350 =
319 +!
118
- 19 -
Year
—
1991
1960
1969
Spectra
A0
Colors
W
No
No
?
Zone 160
Notes:
AB 1914: 0.4 @ 350. 10 measurements.
AC 1914: 8.2 @ 298. 3 measurements.
AD 1 measurement.
Observations:
C11 at 115x. I got an oval on B at 634x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.00 inches.
Separation: AB = 2,904 feet; AC = 15.6 miles; AD = 42.8 miles..
Distance (LY): 710
Total luminosity (Suns): 58
Difficult
Chevalier
A1853; ADS 4712; HD 41792; SAO 113476
Position: 0607+0754
A
B
Magnitude
8.84
11.20
Separation PA
—
—
6
170
Rating: 4 D
Year
—
1911
Spectra
A0
Colors
W
W
Observations:
C8 at 83x. Very faint. There are many 9m stars in the area– look carefully!
Engelmann 26
Bpm 87 (a, b); HD 43587; SAO 113683
Position: 0617+0506
A
B
C
D
Magnitude
5.71
11.36
10.00
13.02
Separation
—
45.2 -!
178.8 -!
68.4 -
Rating: 5 D
PA
—
246 242 216 -
Year
—
1993
1993
1993
Notes:
AB 1911: 58.5 @ 265. 2 measurements. A is variable.
AC 1891: 189.7 @ 246. 4 measurements.
- 20 -
Spectra
F9 V
Colors
W
?
W
?
Zone 160
AD 1911: 69.3 @ 231. 2 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 31.5 inches.
Separation: AB = 4.44 miles; AC = 17.6 miles; AD = 6.72 miles.
Distance (LY): 63
Total luminosity (Suns): 1.66
Deep Sky Objects
Easy
NGC 2143
Rating: 5 E
Position: 0603+0550
Type: Oc
Magnitude: 10.0
Dimensions: 30.0'
Notes:
This cluster is 1.4 billion years old.
Observations:
C11 at 98x. A scattered asterism involving a diamond of four stars and 9 others. Not
much richer than the field.
NGC 2202
Rating: 5 E
Position: 0617+0600
Type: Oc
Notes:
The cluster is 550 million years old.
- 21 -
Zone 160
Observations:
C11 at 115x. Oval ring of stars, mostly void in the center, dominated by STF 885. I
counted 10 faint (12m) stars.
Moderate
NGC 2186
Other Names: Collinder 85; H VII 25
Astronomical League Program: Herschel 400 Club
Rating: 5 M
Position: 0612+0527
Type: Oc
Dimensions: 4'
Class: II 2m
Cluster population: 30
Magnitude: 8.7
Notes:
It is 200 million years old and lies 33,000 light years from the galactic center and 650
light years below the galactic plane.
The brightest star is 9.8m (76 times brighter than the Sun).
Observations:
C8 at 104x. I could not fully resolve it, but it did have a bright center. It is nestled
inside a triangle of 9m to 10m stars. The brighter stars form an "X" pattern.
Model (where the Sun is a baseball):
Its diameter would be 1,090 miles, with its stars being 176 miles apart
Distance (LY): 4,700
Luminosity (suns): 572
- 22 -
Zone 160
Zone 160, Map 4
Double Stars
Easy
A. G. 325
Position: 0629+1354
A
B
Magnitude
8.52
10.69
Rating: 3 E
Separation PA
—
—
8.4 +
292 +
Year
—
1991
Spectra
K5
A
Colors
Y
W
Notes:
1903: 6.9 @ 286. 6 measurements. May be optical because Hipparcos gives
different distances (2,760 and 580 light years).
Observations:
C8 at 104x. Rich but faint field.
South 529
Rating: 4 E
HD 47127; SAO 95907
Position: 0637+1211
A
B
C
Magnitude
6.91
9.35
8.30
Separation
—
56.5 -!!
163.0 -!!
PA
—
137 -!!
169 -
Year
—
1991
1918
Spectra
G5
F8
Colors
Y
O
W
Notes:
AB 1825: 92.0 @ 163. 10 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. The stars have different proper motions.
AC 1825: 187.9 @ 171. 3 measurements. Different proper motions.
Observations:
C8 at 104x.
- 23 -
Zone 160
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.1 inches; C = 15.2 inches.
Separation: AB = 7.84 miles; AC = 22.6 miles.
Distance (LY): 89
Total luminosity (Suns): 1.7
A. G. 327
Position: 0638+1447
Rating: 4 E
A
B
Magnitude
9.63
10.70
Separation PA
—
—
11.3 +
20 -
Year
—
1903
Spectra
A2
Colors
W
O
Notes:
1894: 11.2 @ 21. 2 measurements.
Observations:
C8 at 104x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.75 inches.
Separation: AB = 3.93 miles.
Distance (LY): 223
Total luminosity (Suns): 0.766
Jonckheere 2742
Position: 0623+1431
A
B
Magnitude
9.30
11.57
Rating: 5 E
Separation PA
—
—
60.0
315
Notes:
1 measurement.
Observations:
C8 at 104x. B was extremely faint.
It lies in a rich but faint field.
- 24 -
Year
—
1945
Spectra
A2 V
Colors
W
?
Zone 160
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 54.3 miles.
Distance (LY): 580
Total luminosity (Suns): 5.62
A 2720
Rating: 5 E
ADS 5004; HD 256321; SAO 95613
Position: 0623+1432
A
B
C
Magnitude
9.24
10.80
9.56
Separation
—
1.2 +
66.9
PA
—
49 +
31
Year
—
1991
1922
Spectra
F7 V
G0
Colors
W
No
W
Notes:
AB 1914: 0.9 @ 27. 8 measurements.
AC 1 measurement.
Observations:
C8 at 104x. It is part of an arc of 9m stars. Nice field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.90 inches; B = 18.5 inches.
Separation: AB = 1,575 feet; AC = 17.0 miles.
Distance (LY): 163
Total luminosity (Suns): 0.6
Moderate
Jonckheere 1951
Rating: 5 M
HD 258549
Position: 0630+1348
A
B
C
Magnitude
10.73
10.90
10.54
Separation
—
5.0 25.0
PA
—
130 +
135
- 25 -
Year
—
1941
1941
Spectra
Colors
bW
No
bW
Zone 160
Notes:
AB 1907: 7.5 @ 128. 2 measurements.
AC 1 measurement. May be optical because Hipparcos gives different distances (96
and 55 light years).
Observations:
C8 at 104x. Another 10m pair (20" @ 140) is 5 min SW.
Rich field to the W.
Difficult
STF 932
Rating: 5 D
ADS 5197; HD 46495; SAO 95847
Position: 0634+1445
A
B
Magnitude
8.39
8.59
Separation PA
—
—
1.7 310 -!
Year
—
1998
Spectra
F5
Colors
W
R
Notes:
1830: 2.4 @ 342. Over 100 measurements. The orbital period may be 2,360 years
(Hopmann, 1960).
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.4 inches.
Separation: AB = 3,590 feet.
Distance (LY): 258
Total luminosity (Suns): 7.3
- 26 -
Zone 160
Zone 160, Map 5
Double Stars
Easy
STF 898
Rating: 3 E
ADS 4979; HD 44373; SAO 95585
Position: 0622+1058
A
B
Magnitude
8.90
9.60
Separation PA
—
—
6.1 =
120 -
Year
—
1965
Spectra
B8
Colors
W
O!
Notes:
1828: 6.1 @ 121. 16 measurements.
Observations:
C8 at 104x. Very, very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.50 inches.
Separation: AB = 1.35 miles.
Distance (LY): 142
Total luminosity (Suns): 0.6
STF 901
Rating: 3 E
ADS 5035; HD 44944; SAO 95649
Position: 0625+1031
A
B
Magnitude
7.84
10.38
Separation PA
—
—
19.9 248 =
Year
—
1989
Spectra
B9 IV
Colors
yW
V
Notes:
1829: 20.0 @ 248. 18 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical.
Observations:
C8 at 104x. The colors are odd. Rich field.
- 27 -
Zone 160
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 66.8 miles.
Distance (LY): 2,150
Total luminosity (Suns): 333
A 2816
Rating: 4 E
ADS 5154; HD 46005; SAO 113984
Position: 0631+0956
A
B
C
Magnitude
7.85
10.30
11.66
Separation
—
1.1 +
23.0 -
PA
—
321 +
41 =
Year
—
1991
1921
Spectra
B8
Colors
W
W
W
Notes:
AB 1914: 0.8 @ 318. 7 measurements.
AC 1914: 23.5 @ 41. 2 measurements. No evidence of duplicity seen by Hipparcos.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.23 inches.
Separation: AB = 10.3 miles; AC = 215 miles.
Distance (LY): 6,000
Total luminosity (Suns): 2525
STF 921
Rating: 4 E
ADS 5153; HD 45995; SAO 95766
Position: 0631+1115
A
B
Magnitude
6.17
9.10
Separation PA
—
—
16.1 3-
Year
—
1991
Spectra
B2 Vne
A0 V
Colors
W
pL
Notes:
1831: 16.3 @ 4. 22 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical. However, the stars show similar proper motion.
This star belongs to NGC 2264 and rotates at 293 kps.
- 28 -
Zone 160
Observations:
C8 at 83x. Webb saw them as yW and bW. But Franks saw yW and B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.2 inches; B = 9.00 inches.
Separation: AB = 138 miles.
Distance (LY): 5,500
Total luminosity (Suns): 8,650
OS 146 rej
Rating: 4 E
ADS 5170; HD 46178; SAO 95803
Position: 0632+1140
A
B
Magnitude
6.03
9.85
Separation PA
—
—
29.4 140 -
Year
—
1989
Spectra
K0 III
Colors
Y!
W
Notes:
1867: 33.3 @ 143. 14 measurements.
Observations:
C11 at 115x. Bright field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 38.1 miles.
Distance (LY): 830
Total luminosity (Suns): 220
h725
Rating: 5 E
HD 44212; SAO 113745
Position: 0621+0944
A
B
Magnitude
8.06
10.50
Separation PA
—
—
23.7 +
71 +
Notes:
1901: 23.4 @ 70. 3 measurements.
- 29 -
Year
—
1911
Spectra
K2
Colors
Y
W
Zone 160
Observations:
C8 at 104x.
h726
Rating: 5 E
HD 256294; SAO 113796
Position: 0623+0854
A
B
C
Magnitude
9.73
10.67
11.21
Separation
—
22.4 23.0 +
PA
—
155 +
87 =
Year
—
1987
1991
Spectra
B8 III
Colors
W
?
?
Notes:
AB 1897: 22.5 @ 154. 3 measurements.
AC 1905: 22.9 @ 87. 4 measurements.
There are three more very faint comes.
Observations:
C8 at 104x. A 7.5m star lies 10 min E. Extremely rich field!
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.0 inches.
Separation: AB = 2.37 miles; AC = 2.44 miles.
Distance (LY): 68
Total luminosity (Suns): 0.08
Abetti 5
Rating: 5 E
HD 46265; SAO 95816
Position: 0633+1010
A
B
Magnitude
7.57
10.90
Separation PA
—
—
102.5 257 +
Year
—
1962
Spectra
K0
Colors
yO
W
Notes:
1921: 103.6 @ 255. 3 measurements. The stars share common proper motion.
Observations:
C8 at 104x. It lies in a moderately rich but faint field. Without a double star catalog,
you'd never know this one was a double.
- 30 -
Zone 160
This pair lies on the edge of a very faint diffuse nebula, NGC 2245. I was not able to
glimpse this ellusive blob of star stuff despite Dreyer's description of it as "pretty large;
cometary form; much brighter nucleus; southeast almost star.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 23.6 inches.
Separation: AB = 928 miles.
Distance (LY): 5,800
Total luminosity (Suns): 1,620
Moderate
Tycho 241
Rating: 4 M
HD 255545; SAO 113735
Position: 0621+0857
A
B
Magnitude
9.49
11.27
Separation PA
—
—
2.1
92
Year
—
1991
Spectra
Colors
W
W
Notes:
1 measurement.
Observations:
C11 at 339x.
A. G. 114
Rating: 4 M
HD 45544
Position: 0628+0834
A
B
Magnitude
9.14
9.90
Separation PA
—
—
5.0 =
0=
Notes:
1894: 5.2 @ 0. 9 measurements.
Observations:
C11 at 115x.
- 31 -
Year
—
1997
Spectra
A2
Colors
W
O?
Zone 160
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.55 inches.
Separation: AB = 1.94 miles.
Distance (LY): 249
Total luminosity (Suns): 1.60
Smart 60
Rating: 5 M
HD 46453; SAO 95842
Position: 0634+1124
A
B
Magnitude
8.60
11.40
Separation PA
—
—
10.3
160
Year
—
1911
Spectra
K0
Colors
Y
?
Notes:
1 measurement.
Observations:
C8 at 104x. It lies in a moderately rich but faint field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 25.2 inches.
Separation: AB = 17.7 miles.
Distance (LY): 1,100
Total luminosity (Suns): 38
Deep Sky Objects
Easy
NGC 2261
Other Names: Hubble's Variable Nebula; H IV 2
Astronomical League Program: Caldwell Club, Herschel II Club
Rating: 2 E
Position: 0639+0844
Type: Gn
Dimensions: 2' x 1'
Class: E+R
- 32 -
Magnitude: 10.7
Zone 160
Notes:
It was discovered by William Herschel in 1783 and was the first object photographed
by the Hale 200-inch telescope (Mt. Palomar) in 1949.
The variability of the star (and hence the nebula) was discovered at Athens
Observatory in 1861. Carl Lampland (Lowell Observatory) made the most intense study
of NGC 2261, taking more than 900 photographs over a 30-year period. He showed that
whereas the star's period is very regular, the shape of the nebula changes a great deal with
time. These rapid changes (some amounting to as much as 1" of arc in 4 days) may be
shadows being cast on the nebula by material orbiting near the star.
NGC 2261 is known as a Herbig-Haro object, small, odd and brightly lit nebulae
discovered in 1946-7 by George Herbig and Guillamero Haro while studying NGC 1999.
They are lit by bipolar flows streaming outward from T Tau stars, young sun-like G-stars
with strong emission lines (due to active chromospheres) that are still approaching the
Main Sequence. (T Tauri is thought to be
only 300,000 years old.) They have a high
abundance of lithium (which is destroyed
early in a star's life and only formed again
late in the lives of some stars) and have
strong solar winds (up to 300 km/sec) and
rapid rotation.
Observations:
C8 at 83x. It is bright and fan-shaped.
The variable R Mon is easy to spot, too. It
is brighter in the S end, and longer on the W
side.
NGC 2261 (Hubble’s Variable Nebula)
Reflection nebula with variable star
Observed with C8 on 2/1/92
Magnification: 200x
Model (where the Sun is a baseball):
Its diameter would be 487 miles.
Distance (LY): 6,520
- 33 -
Zone 160
Collinder 95
Rating: 4 E
Position: 0631+0956
Type: Oc
Cluster population: 10
Class: IV 2 p n
Dimensions: 19'
Notes:
This cluster is 229 million years old.
Observations:
C11 at 115x. Kite-shaped group, sparse, some 9 stars counted. The brightest star is in
the base of the kite.
Difficult
NGC 2245
Other Names: H IV 3
Astronomical League Program: Herschel II Club
Rating: 4 D
Position: 0633+1010
Type: Gn
Class: R
Dimensions: 5' x 3'
Observations:
C8 at 65x. It is small and comet-like, with a few 9m stars embedded. The apex
points NE.
Distance (LY): 9,780
Trumpler 5
Other Names: Collinder 105
Rating: 4 D
Position: 0637+0926
Type: Oc
Dimensions: 7'
Class: II 3rn
Cluster population: 150
- 34 -
Magnitude: 10.0
Zone 160
Notes:
The cluster is 4 billion years old.
Observations:
C8 at 104x. It appears as a misty ball, best seen with averted vision. The red star you
see is the carbon star V493 Mon. Glorious field!
Distance (LY): 9,780
Luminosity (suns): 750
NGC 2259
Other Names: Melotte 48; Collinder 108; H VI 28
Astronomical League Program: Herschel II Club
Rating: 5 D
Position: 0639+1053
Type: Oc
Dimensions: 4'
Class: II 2pn
Cluster population: 25
Magnitude: 10.8
Notes:
The brightest star is 14m.
The cluster is 316 million years old.
Observations:
C8 at 104x. It is nebulous, with only 1 star resolved at high powers. Use averted
vision and see if you can spot the one star I did on the N edge. Very rich field.
Distance (LY): 10,800
Total luminosity (Suns): 440
- 35 -
Zone 160
Zone 160, Map 6
Reference Star
13 Mon (; HD 46300; SAO 114034)
Position: 0633+0720
Mag : 4.47
Assumed distance: 1,510 light years
Spectrum : A0 I
Color : W
Assumed luminosity (suns): 2,900
Notes:
This star is a member of the Mon OB1 Association.
Double Stars
Easy
STF 926
Fabricius 5 (a); ADS 5162; HD 46105; SAO 114002
Position: 0632+0546
A
B
a
Magnitude
7.21
8.52
9.67
Separation
—
11.0 +
0.9
PA
—
290 +
19
Rating: 2 E
Year
—
1997
1991
Spectra
A1p
A0
Colors
Y!
dB!
No
Notes:
AB 1829: 10.7 @ 287. 26 measurements. The stars share common proper motion.
Aa 1 measurement.
Observations:
C8 at 83x. Moderate field. Webb saw them as Y and W.
- 36 -
Zone 160
STF 939
Rating: 2 E
HD 46867; SAO 114112
Position: 0636+0518
A
B
C
D
Magnitude
8.30
9.16
9.39
11.99
Separation
—
30.2 +
39.7 35.4
PA
—
106 =
51 +
305
Year
—
1991
1991
1987
Spectra
B0 III
B8
B5
Colors
bW
dB
pO
No
Notes:
AB 1832: 29.8 @ 106. 17 measurements. The stars share a small common proper
motion.
AC 1832: 39.8 @ 49. L 17 measurements. Similar proper motions.
AD 1 measurement.
Observations:
C8 at 83x. Webb called it "beautiful."
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches; B = 4.57 inches; C = 2.95 inches.
Separation: AB = 137 miles; AC = 180 miles; AD = 160 miles.
Distance (LY): 2,900
Total luminosity (Suns): 560
STF 915
V648 Mon; ADS 5097; HD 45530; SAO 113926
Position: 0628+0516
A
B
C
Magnitude
7.39
8.82
11.20
Separation
—
5.9 =
39.2 +
PA
—
43 +
127 +
Rating: 3 E
Year
—
1991
1912
Spectra
A1p
Colors
W
G
?
Notes:
AB 1822: 5.9 @ 37. 22 measurements. The stars share common proper motion.
AC 1905: 38.3 @ 126. 2 measurements.
Observations:
C8 at 83x. Moderate field.
- 37 -
Zone 160
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.31 inches.
Separation: AB = 12.0 miles; AC = 79.6 miles.
Distance (LY): 1,300
Total luminosity (Suns): 154
STF 895 rej
Rating: 4 E
HD 44213; SAO 113741
Position: 0621+0544
A
B
Magnitude
8.06
10.25
Separation PA
—
—
29.0 59 =
Year
—
1991
Spectra
M3 Ib-II
A2
Colors
Y
bW
Notes:
1897: 29.2 @ 59. 9 measurements. The stars have different proper motions.
Observations:
C8 at 104x. John Herschel saw them as R! and G. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 1.05 inches; B = 8.00 inches.
Separation: AB = 294 miles.
Distance (LY): 6,500
Total luminosity (Suns): 2,300
STF 930 rej
Rating: 4 E
HD 259787; SAO 114060
Position: 0634+0759
A
B
C
Magnitude
8.27
9.98
9.60
Separation
—
26.3 43.8 =
PA
—
277 +
107 =
Year
—
1991
1987
Spectra
F8 II
A0
Colors
W
W
W
Notes:
AB 1898: 26.4 @ 275. 8 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. The stars have a large difference in proper
motion.
AC 1898: 43.8 @ 107. 9 measurements.
- 38 -
Zone 160
Abt discovered 4 other very faint comes in 1987.
Observations:
C8 at 104x. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.5 feet; B = 6.84 inches.
Separation: AB = 164 miles; AC = 273 miles.
Distance (LY): 4,000
Total luminosity (Suns): 910
14 Mon
STF 938; ADS 5211; HD 46642; SAO 114085
Position: 0635+0734
A
B
Magnitude
6.50
10.70
Separation PA
—
—
10.8 +
209 +
Rating: 4 E
Year
—
1958
Spectra
A0 V
Colors
W
?
Notes:
1831: 10.3 @ 207. 11 measurements.
Observations:
C8 at 83x. Rich field.
Distance (LY): 490
Total luminosity (Suns): 49
STF 931 rej
Rating: 5 E
HD 259829
Position: 0634+0759
A
B
Magnitude
9.69
10.42
Separation PA
—
—
23.7 +
22 -
Year
—
1954
Spectra
Colors
W
W
Notes:
1906: 23.5 @ 24. 2 measurements.
Observations:
C11 at 115x. It gets lost in a rich field.
Distance (LY): 311
Total luminosity (Suns): 1.52
- 39 -
Zone 160
Moderate
OS 142
AC = Jonckheere 2004; ADS 5124; HD 45789; SAO 113953
Position: 0630+0707
A
B
C
Magnitude
7.12
11.23
11.10
Separation
—
8.6 +
27.0
PA
—
354 =
206
Year
—
1991
1942
Rating: 4 M
Spectra
B3 IV
Colors
W
B
?
Notes:
AB 1848: 8.4 @ 354. 9 measurements.
AC 1942: 27 @ 206. 1 measurements.
The primary is a spectroscopic binary.
The pair formerly listed as Jonchkeere 2004 appears to be identical, with distance
doubled.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.9 inches.
Separation: AB = 12.2 miles; AC = 38.3 miles.
Distance (LY): 910
Total luminosity (Suns): 98
Deep Sky Objects
Easy
NGC 2251
Rating: 2 E
Other Names: Collinder 101; H VIII 3
Astronomical League Program: Herschel 400 Club, Binocular Deep Sky Club
Position: 0635+0822
Type: Oc
Dimensions: 10'
Class: III 2m
Cluster population: 30
- 40 -
Magnitude: 7.3
Zone 160
Notes:
It is 267 million years old and lies 32,000 light years from the galactic center and
right on the galactic plane. At least 92 stars belong to this group. The brightest star is
9.1m (440 times brighter than the Sun).
Observations:
C8 at 83x. Nice wedge with a NW
to SE axis, and some nebulosity. The
overall shape reminds Dean Williams
of a dolphin. But Glenn Bock's
description takes the cake: "a man
running towards the SW edge of the
field." His observation notes go on to
describe in intricate detail the stars that
make up the head, torso, arms and legs.
Very creative!
C11 at 115x. Sparse and oblong
(about three to one in dimensions), I
counted 15 stars. Very rich field.
Model (where the Sun is a baseball):
Its diameter would be 4,780 miles
with its stars 780 miles apart.
NGC 2251
Open cluster (III 2 m; 30 stars)
Observed with C8 on 2/1/92
Magnification: 80x
Distance (LY): 4,330
Luminosity (suns): 1,760
Collinder 97
Rating: 3 E
Position: 0631+0555
Type: Oc
Dimensions: 21'
Class: IV 3p
Cluster population: 15
Magnitude: 5.4
Notes:
The cluster is 100 million years old.
Observations:
C8 at 104x. A very uneven group of stars dominated by three 7m stars in a large right
triangle. The star at the right angle is a lovely W-B double (about 12" @ 320). Rich
field.
- 41 -
Zone 160
Distance (LY): 2,050
Total luminosity (Suns): 2,270
NGC 2254
Other Names: Collinder 103; H VII 22
Astronomical League Program: Herschel II Club
Rating: 4 E
Position: 0636+0740
Type: Oc
Dimensions: 4'
Class: I 1m
Cluster population: 50
Magnitude: 9.1
Notes:
This cluster is 203 million years old and is 34,000 light years from the galactic center
and lies right on the galactic plane. At least 93 stars are known to be members of the
group. The brightest star is 11.9m (60 times brighter than the Sun).
1.5o SW is Plaskett's Star (at 0637+0608), one of the most massive known, discovered
by J. S. Plaskett at Victoria Observatory in 1922. It is actually a close pair of O8 giants,
each about 55 Suns in mass. They orbit one another every 14.3961 days. Their surface
temperatures are about 28,000o K each and the total magnitude is 6.05m. The secondary
is actually underluminous for its mass and may be smaller than the primary. They are a
part of the Mon OB2 Association.
Observations:
C8 at 206x. It resembles a planetary nebula; I could only resolve 6 stars at high
power. It has a "U" shape and is small and dense.
Model (where the Sun is a baseball):
Its diameter would be 2,700 miles. Its stars would be 370 miles apart.
Distance (LY): 7,710
Luminosity (suns): 1,070
Collinder 106
Rating: 4 E
Position: 0637+0557
Type: Oc
Dimensions: 45'
Class: III 3p
Cluster population: 20
- 42 -
Magnitude: 4.6
Zone 160
Notes:
This cluster is 5.5 million years old.
Observations:
C8 at 83x. It lies 15 min S of Plaskett's Star. It is dominated by three bright stars, but
is very much spread out.
Distance (LY): 5,220
Total luminosity (Suns): 31,000
Collinder 92
Rating: 5 E
Position: 0623+0507
Type: Oc
Magnitude: 8.5
Dimensions: 11.0'
Notes:
Asterism?
Observations:
C8 at 104x. A very poor cluster that is hardly discernible from the rest of the
moderate field.
The digitized sky survey shows no appreciable concentration in this area.
Collinder 111
Rating: 5 E
Position: 0639+0654
Type: Oc
Magnitude: 7.0
Dimensions: 3.2'
Notes:
Asterism?
Observations:
C8 at 104x. Disappointing. The integrated magnitude must be driven by the 6.9 m
star at its center, as the other 8 or 10 stars I saw were all around 10m or less.
- 43 -
Zone 160
Moderate
NGC 2236
Other Names: Collinder 94; H VII 5
Astronomical League Program: Herschel II Club
Rating: 5 M
Position: 0630+0650
Type: Oc
Dimensions: 6'
Class: II 2m
Cluster population: 50
Magnitude: 8.5
Notes:
It is 1.2 billion years old and lies 38,000 light years from the galactic center and 320
light years below the galactic plane.
Observations:
C8 at 83x. It is bright and small. There is a 10m star in the center.
Model (where the Sun is a baseball):
Its diameter would be 6,180 miles with its stars 830 miles apart.
Distance (LY): 9,550
Luminosity (suns): 2,840
NGC 2252
Other Names: Collinder 102; H VIII 50
Astronomical League Program: Herschel II Club
Rating: 5 M
Position: 0635+0523
Type: Oc
Dimensions: 20'
Class: III 2mn
Cluster population: 30
Magnitude: 7.7
Notes:
The brightest star is 9m.
Observations:
C8 at 83x. I found a patch of field just S that is just as rich as this cluster!
Distance (LY): 5,000
Total luminosity (Suns): 1,630
- 44 -
Zone 160
Difficult
NGC 2237
Other Names: Rosette Nebula
Astronomical League Program: Caldwell Club
Position: 0632+0503
Type: Gn
Dimensions: 80' x 60'
Class: E
Rating: 3 D
Magnitude: 5.5
Notes:
The nebula is some 80’ in diameter and so is of incredibly low surface brightness.
The center of the nebula appears rarified, perhaps having been blown out by the fierce
stellar gales (one hesitates to say mere "winds") of the hot young stars of NGC 2244.
It has several NGC numbers (NGC 2237, 2238, 2239, 2246) because when William
Herschel discovered it, it would only fit into his scope in small pieces.
It is 55 light years in diameter and has the mass of about 11,000 suns.
Observations:
C8 at 47x. This is an object best seen with a nebular filter and a rich field adapter
(telecompressor). In moments of good seeing, knotty structure is suggested.
Model (where the Sun is a baseball):
DIts diameter would be 2,000 miles.
Distance (LY): 5,600
Luminosity (suns): 15,000
- 45 -
Zone 160
Zone 160, Map 7
Reference Star
Xi Gem (31 Gem; Alzirr; HD 48737; SAO 96074)
Position: 0645+1254
Mag : 3.40
Spectrum : F5 IV Color : W
Assumed distance: 57 light years
Assumed luminosity (suns): 11.1
Notes:
The primary may be a Delta Sct variable. It is also an infra-red source.
Double Stars
Easy
38 Gem
STF 982; ADS 5559; HD 50635; SAO 96265
Position: 0655+1310
A
B
C
Magnitude
4.73
7.74
10.30
Separation
—
7.2 +
111.5 +
PA
—
146 328 =
Rating: 2 E
Year
—
1997
1932
Spectra
F0 V
G4
Colors
Y
B
W?
Notes:
AB 1822: 5.7 @ 179. Over 100 measurements. The orbital period may be 3,190
years (Hopmann, 1949). The primary is also a spectroscopic binary and a Delta Scuti
variable.
AC 1912: 109.3 @ 328. 2 measurements.
Observations:
C8 at 83x. Webb saw them as Y and B or Y and V.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.70 inches; B = 18.6 inches.
Separation: AB = 1.02 miles; AC = 15.8 miles.
Distance (LY): 91
Total luminosity (Suns): 9.19
- 46 -
Zone 160
OSS 80
Rating: 2 E
HD 51502; SAO 96325
Position: 0658+1414
A
B
C
Magnitude
7.30
7.36
8.27
Separation
—
124.7 +
80.2 -
PA
—
54 +
112 =
Year
—
1992
1992
Spectra
B9
A5
G5
Colors
W
W
W
Notes:
AB 1876: 124.4 @ 53. 5 measurements.
AC 1897: 81.6 @ 112. 10 measurements.
The stars share a small common proper motion. However, Hipparcos shows different
distances (2,300 and 670 light years).
Observations:
C8 at 104x. It forms a beautiful little right triangle. Rich field.
Kustner 27
Rating: 4 E
ADS 5348; HD 262229
Position: 0642+1451
A
B
Magnitude
9.96
10.10
Separation PA
—
—
6.9 187 +
Year
—
1952
Spectra
G0
Colors
W
W
Notes:
1901: 7.1 @ 186. 10 measurements.
Observations:
C11 at 115x.
STF 959
Rating: 4 E
SAO 96066
Position: 0645+1346
A
B
Magnitude
9.70
9.90
Separation PA
—
—
11.7 +
175 -
- 47 -
Year
—
1987
Spectra
G5
Colors
W
W?
Zone 160
Notes:
1828: 11.6 @ 176. 10 measurements. The stars share common proper motion.
Observations:
C8 at 104x. A 9m star is 4 min E. The field is very rich but faint.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 21.3 inches.
Separation: AB = 8.38 miles.
Distance (LY): 459
Total luminosity (Suns): 4
Hough 239
Rating: 4 E
ADS 5491; HD 49638; SAO 96164
Position: 0650+1442
A
B
C
Magnitude
8.44
9.40
10.46
Separation
—
0.5 =
34.7 -
PA
—
146 +
338 +
Year
—
1995
1981
Spectra
G0
Colors
yW
No
bW
Notes:
AB 1886: 5.0 @ 130. 17 measurements.
AC 1887: 36.1 @ 336. 5 measurements.
Observations:
C8 at 104x. It forms the E vertex of a 9m triangle.
Nice field to the N.
Moderate
Jonckheere 273
Rating: 5 M
ADS 5577; HD 266265
Position: 0655+1235
A
B
C
Magnitude
9.91
10.34
13.30
Separation
—
4.5 7.4 -
PA
—
338 208 -
- 48 -
Year
—
1991
1987
Spectra
G5 V
Colors
Y
W
?
Zone 160
Notes:
AB 1908: 5.2 @ 339. 10 measurements.
AC 1910: 9.2 @ 212. 5 measurements.
There are three other very faint comes.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.00 inches.
Separation: AB = 2,798 feet; AC = 4,594 feet.
Distance (LY): 76
Total luminosity (Suns): 0.085
Difficult
30 Gem
Lamont 3; ADS 5387; HD 48433; SAO 96051
Position: 0644+1314
A
B
Magnitude
4.49
11.10
Separation PA
—
—
27.2 184 -
Rating: 5 D
Year
—
1904
Spectra
K0 III
Colors
Y!!
?
Notes:
1836: 32.0 @ 185. 4 measurements. The primary is an infra-red source.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 11.7 miles.
Distance (LY): 276
Total luminosity (Suns): 96.2
- 49 -
Zone 160
Zone 160, Map 8
Double Stars
Easy
STF 953
Rating: 1 E
ADS 5328; HD 47888; SAO 114265
Position: 0641+0859
A
B
Magnitude
6.53
7.05
Separation PA
—
—
7.1 =
330 -
Year
—
1991
Spectra
F5
F5
Colors
pO
pB
Notes:
1832: 7.1 @ 331. 27 measurements. The stars show similar proper motions.
Observations:
C8 at 83x. Moderate field. Webb saw them as yW and bW.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.8 inches; B = 12.2 inches.
Separation: AB = 8.64 miles.
Distance (LY): 780
Total luminosity (Suns): 190
STF 965
Rating: 3 E
ADS 5448; HD 263869
Position: 0647+1055
A
B
C
D
a
Magnitude
8.80
9.30
13.20
9.41
13.70
Separation
—
5.5 =
20.0 +!
42.6 12.1 +
PA
—
345 318 59 19 -
- 50 -
Year
—
1962
1962
1991
1962
Spectra
G0
Colors
yW
O
No
No
No
Zone 160
Notes:
AB 1829: 5.5 @ 352. 11 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical.
AC 1879: 14.4 @ 322. 7 measurements.
AD 1829: 47.0 @ 71. 16 measurements.
Aa 1905: 11.0 @ 36. 5 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.7 inches.
Separation: AB = 27.9 miles; AC = 101 miles; AD = 216 miles; Aa = 61.4 miles.
Distance (LY): 3,250
Total luminosity (Suns): 500
STF 986
Rating: 3 E
ADS 5572; HD 50769; SAO 114602
Position: 0655+0930
A
B
Magnitude
9.10
9.60
Separation PA
—
—
5.4 +
163 -
Year
—
1992
Spectra
A2
Colors
W
W
Notes:
1828: 5.2 @ 167. 22 measurements.
Observations:
C8 at 206x. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.53 inches.
Separation: AB = 2,534 feet.
Distance (LY): 57
Total luminosity (Suns): 0.12
- 51 -
Zone 160
STF 995
Rating: 4 E
HD 51073; SAO 96293
Position: 0656+1102
A
B
Magnitude
8.50
9.10
Separation PA
—
—
21.7 +
293 =
Year
—
1988
Spectra
G5
Colors
Y
W
Notes:
1828: 21.6 @ 293. 5 measurements.
Observations:
C8 at 104x.
Zone 160, Map 9
Double Stars
Easy
Jonckheere 2009
Rating: 4 E
ADS 5388; HD 48473; SAO 114332
Position: 0644+0729
A
B
Magnitude
8.56
9.73
Separation PA
—
—
7.6 +
38 -
Notes:
1902: 7.3 @ 42. 5 measurements.
The stars share common proper motion.
Observations:
C8 at 104x.
- 52 -
Year
—
1991
Spectra
A2
Colors
W
Y
Zone 160
OSS 79
Rating: 4 E
HD 50557; SAO 114580
Position: 0654+0641
A
B
Magnitude
7.09
7.55
Separation PA
—
—
113.9 89 =
Year
—
1995
Spectra
G5
A0
Colors
W
W
Notes:
1875: 116.1 @ 89. 15 measurements.
The stars share a small common proper motion. However, Hipparcos shows different
distances (760 and 1,250 light years).
Observations:
C8 at 104x.
h2347
Rating: 5 E
HD 265181
Position: 0651+0533
A
B
Magnitude
9.85
10.09
Separation PA
—
—
21.9 +
21 +
Year
—
1991
Spectra
Colors
W
W
Notes:
1910: 22.8 @ 19. 4 measurements.
Observations:
C11 at 115x.
Distance (LY): 79
Total luminosity (Suns): 0.101
- 53 -
Zone 160
Moderate
A 2823
Rating: 4 M
ADS 5374; HD 48347; SAO 114314
Position: 0643+0607
A
B
Magnitude
7.87
10.13
Separation PA
—
—
4.5 +
300 =
Year
—
1991
Spectra
A2 V
Colors
W
O
Notes:
1914: 4.1 @ 300. 7 measurements.
Observations:
C8 at 104x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 5.54 miles.
Distance (LY): 790
Total luminosity (Suns): 26
STF 949
Rating: 5 M
ADS 5323; HD 47889
Position: 0641+0542
A
B
Magnitude
8.90
9.90
Separation PA
—
—
3.5 +
289 +
Year
—
1992
Spectra
B9 V
Colors
W
?
Notes:
1831: 3.4 @ 288. 12 measurements.
Observations:
C8 at 104x. It forms the acute angle of an 8.9m triangle.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.60 inches.
Separation: AB = 1.76 miles.
Distance (LY): 323
Total luminosity (Suns): 3
- 54 -
Zone 160
Jonckheere 666
Rating: 5 M
ADS 5388; HD 48473; SAO 114332
Position: 0644+0729
A
B
C
Magnitude
8.36
11.10
11.10
Separation
—
1.8 15.1 +
PA
—
30 +
24 +
Year
—
1985
1955
Spectra
A0
Colors
W
No
W?
Notes:
AB 1911: 2.1 @ 26. 6 measurements.
AC 1911: 14.1 @ 22. 5 measurements.
There is a 14th mag star 8" np C.
Observations:
C8 at 104x.
Zone 160, Map 10
Double Stars
Easy
15 Mon
S Mon; STF 950; ADS 5322; HD 47839; SAO 114258
Position: 0641+0954
A
B
C
D
E
Magnitude
4.66
7.99
9.80
9.60
9.90
Separation
—
2.9 +
17.0 +
41.5 +
72.9 -
PA
—
213 +
15 +
308 =
139 =
Year
—
1998
1998
1938
1985
Rating: 2 D
Spectra
O7 Ve
B7
Colors
W
?
?
?
W?
Notes:
This star complex is part of the Mon OB1 Association, and is listed as star #131 of
NGC 2264.
- 55 -
Zone 160
The primary is a spectroscopic binary and an infra-red source.
AB 1825: 2.8 @ 209. 1912 (Bowyer): 3.5 @ 128. 62 measurements.
AC 1831: 16.6 @ 13. 28 measurements.
AD 1841: 41.3 @ 308. 4 measurements.
AE 1874: 74.2 @ 139. 14 measurements.
There are also other components (F of 9.08m and G of 8.30m, with FG being
measured in 1873 at 39.4 @ 262 and 1985 at 38.8 @ 263, 5 measurements) and an S star
(magnitude not listed in the WDS). CHARA also found an "a" component.
Observations:
C8 at 206x. It lies at the base of the Christmas Tree cluster, and has a hint of
nebulosity around it. Webb saw them as G, B and ?.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 24.0 inches; B = 3.61 inches.
Separation: AB = 11.1 miles; AC = 65.0 miles; AD = 159 miles; AE = 279 miles.
Distance (LY): 2,450
Total luminosity (Suns): 7,790
STF 951
Ward; ADS 5316; HD 47755; SAO 114241
Position: 0640+0949
A
B
C
D
E
Magnitude
8.47
10.91
12.46
9.13
12.77
Separation
—
21.5 +
26.1
103.8
103.9
Rating: 4 E
PA
—
311 +
286
137
64
Year
—
1987
1984
1987
1987
Spectra
B3 Vn
Colors
bW
pO
No
No
?
Notes:
AB 1830: 21.4 @ 309. 11 measurements.
AC, AD and AE all 1 measurement.
Observations:
C8 at 83x. It is totally overpowered by the Christmas Tree cluster (NGC 2264). 15
Mon lies 2 min NE. Very rich field.
- 56 -
Zone 160
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.6 inches.
Separation: AB = 37.6 miles; AC = 45.6 miles; AD = 181 miles; AE = 182 miles.
Distance (LY): 1,120
Total luminosity (Suns): 112
STF 952
Hussey; Doberck 7 (C); ADS 5322
Position: 0641+0953
A
B
C
Magnitude
9.75
10.05
10.20
Separation
—
14.0 +
133.3
Rating: 4 E
PA
—
116 +?
320
Year
—
1991
1914
Spectra
B9
Colors
W
W
W
Notes:
AB 1829: 13.6 @ 295. 15 measurements. Quadrant reversal?
AC 1 measurement.
Observations:
C11 at 115x. Swamped by a bright, rich field (the Christmas Tree Cluster, NGC
2264).
Dembowski 11
CHR 168 (a); ADS 5325
Position: 0641+0954
A
B
C
Magnitude
8.93
10.40
9.70
Rating: 4 E
Separation
—
3.4 41.4 +
PA
—
45 +
223 +
Notes:
AB 1869: 3.8 @ 45. 15 measurements.
AC 1873: 40.8 @ 222. 5 measurements.
Observations:
C11 at 115x. Flooded by a bright, rich field.
- 57 -
Year
—
1990
1990
Spectra
B6 V
Colors
W
W?
Zone 160
STF 954
Soulie 558 (C); ADS 5327; HD 47887; SAO 114264
Position: 0641+0928
A
B
C
Magnitude
7.18
10.23
12.20
Separation
—
13.8 +
58.1
PA
—
154 +
118
Rating: 4 E
Year
—
1984
1984
Spectra
B3 III
B9 V
Colors
W
?
No
Notes:
AB 1829: 12.7 @ 154. 7 measurements.
AC 1 measurement.
Observations:
C8 at 104x. This star actually sits on top of the "Cone" nebula, a fantastic cosmic
cloud too faint for an 8" telescope. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.2 inches; B = 5.68 inches.
Separation: AB = 25.8 miles; AC = 109 miles.
Distance (LY): 1,200
Total luminosity (Suns): 216
Moderate
STF 3118
Rating: 5 M
ADS 5334; HD 47961
Position: 0641+0950
A
B
Magnitude
9.60
10.30
Separation PA
—
—
3.3 +
173 -
Year
—
1997
Spectra
B5
A2
Colors
R?
?
Notes:
1831: 2.4 @ 175. 15 measurements.
Observations:
C8 at 206x. It is 5 min S and 10 min E of an 8m star (SAO 114241) at the S end of
open cluster NGC 2264.
- 58 -
Zone 160
Deep Sky Objects
Easy
NGC 2264
Rating: 3 E
Other Names: Christmas Tree; Cone Nebula; H VIII 5; Melotte 49; Collinder 112; H V
27
Astronomical League Program: Herschel 400 Club, Urban Deep Sky Club, Binocular
Deep Sky Club
Position: 0641+0953
Type: Oc
Dimensions: 60' x 30'
Class: III 3mn
Cluster population: 40
Magnitude: 3.9
Notes:
The cluster is 20 million years old. It contains several O7 and O8 stars and two Delta
Scu variables.
It lies 30,000 light years from the galactic center and 100 light years above the
galactic plane.
Amateur astronomer Leland Copeland has dubbed this cluster the "Christmas Tree".
That's a very fitting name!
Observations:
C8 at 65x. Very good, and aptly named! The bright star (5m) in the base of the tree
is S Mon, the one that lights the Cone Nebula (8,500 times brighter than the Sun).
Model (where the Sun is a baseball):
Its diameter would be 14,610 miles. Its stars would be 2,140 miles apart
Distance (LY): 2,170
Luminosity (suns): 10,150
- 59 -
Zone 160
Zone 160 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
STF 953
0641+0859
1E
8
STF 859
0610+0540
2E
3
STF 877
0615+1435
2E
1
STF 880
0616+1035
2E
2
STF 926
0632+0546
2E
6
STF 939
0636+0518
2E
6
38 Gem
0655+1310
2E
7
OSS 80
0658+1414
2E
7
A. G. 321
0605+1435
3E
1
STF 840
0606+1045
3E
2
STF 854
0608+0548
3E
3
STF 853
0609+1140
3E
1
STF 898
0622+1058
3E
5
STF 901
0625+1031
3E
5
STF 915
0628+0516
3E
6
A. G. 325
0629+1354
3E
4
STF 965
0647+1055
3E
8
STF 986
0655+0930
3E
8
Component
A
B
A
B
C
A
B
A
B
A
B
a
A
B
C
D
A
B
C
A
B
C
A
B
A
B
C
BC
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
C
D
a
A
B
- 60 -
Mag
6.53
7.05
8.39
8.68
9.52
7.02
7.30
8.40
8.71
7.21
8.52
9.67
8.30
9.16
9.39
11.99
4.73
7.74
10.30
7.30
7.36
8.27
7.71
8.85
7.19
9.73
10.10
8.81
9.78
8.42
8.96
8.90
9.60
7.84
10.38
7.39
8.82
11.20
8.52
10.69
8.80
9.30
13.20
9.41
13.70
9.10
9.60
Separation
—
7.1 =
—
43.5 +!
BC 0.4
—
5.7 +
—
5.6 +
—
11.0 +
0.9
—
30.2 +
39.7 35.4
—
7.2 +
111.5 +
—
124.7 +
80.2 —
36.1 —
21.5 +
PA
—
330 —
243 BC 309
—
264 =
—
55 +
—
290 +
19
—
106 =
39.7 35.4
—
146 111.5 +
—
54 +
80.2 —
188 +
—
248 +
0.4 —
5.5 —
35.7 +!
—
6.1 =
—
19.9 —
5.9 =
39.2 +
—
8.4 +
—
5.5 =
20.0 +!
42.6 12.1 +
—
5.4 +
126 -!!
—
321 —
5+
—
120 —
248 =
—
43 +
39.2 +
—
292 +
—
345 20.0 +!
42.6 19 —
163 -
Zone 160
Designation
Position
Rating
Map
Barton 1188
0600+1313
4E
1
STF 844
0608+1400
4E
1
OSS 71
0614+1148
4E
1
75 Ori
0617+0956
4E
2
STF 885
0617+0600
4E
3
OSS 73
0619+1326
4E
1
STF 891
0620+1217
4E
1
STF 895 rej
0621+0544
4E
6
STF 921
0631+1115
4E
5
A 2816
0631+0956
4E
5
OS 146 rej
0632+1140
4E
5
STF 930 rej
0634+0759
4E
6
14 Mon
0635+0734
4E
6
South 529
0637+1211
4E
4
A. G. 327
0638+1447
4E
4
STF 951
0640+0949
4E
10
STF 952
0641+0953
4E
10
Dembowski 11
0641+0954
4E
10
STF 954
0641+0928
4E
10
Kustner 27
Jonckheere
2009
0642+1451
4E
7
0644+0729
4E
9
Component
A
B
A
B
A
B
A
B
C
D
CD
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
C
A
B
A
B
C
A
B
A
B
C
D
E
A
B
C
A
B
C
A
B
C
A
B
A
B
- 61 -
Mag
10.16
10.35
8.40
9.30
7.12
7.64
5.39
10.10
10.08
10.90
9.00
10.60
6.54
7.67
7.67
11.20
8.06
10.25
6.17
9.10
7.85
10.30
11.66
6.03
9.85
8.27
9.98
9.60
6.50
10.70
6.91
9.35
8.30
9.63
10.70
8.47
10.91
12.46
9.13
12.77
9.75
10.05
10.20
8.93
10.40
9.70
7.18
10.23
12.20
9.96
10.10
8.56
9.73
Separation
—
5.2 —
23.7 +
—
89.3 —
63.0 +
114.2 -
PA
—
353 -?
—
9+
—
311 +
—
260 +
114.2 -
5.1 +
—
10.1 +
—
72.4 —
21.9 =
—
29.0 —
16.1 —
1.1 +
23.0 —
29.4 —
26.3 43.8 =
—
10.8 +
—
56.5 -!!
163.0 -!!
—
11.3 +
—
21.5 +
26.1
103.8
103.9
—
14.0 +
133.3
—
3.4 41.4 +
—
13.8 +
58.1
—
6.9 —
7.6 +
228 +
—
297 +
—
44 =
—
293 +
—
59 =
—
3—
321 +
23.0 —
140 —
277 +
43.8 =
—
209 +
—
137 -!!
163.0 -!!
—
20 —
311 +
26.1
103.8
64
—
116 +?
133.3
—
45 +
41.4 +
—
154 +
58.1
—
187 +
—
38 -
Zone 160
Designation
Position
Rating
Map
STF 959
0645+1346
4E
7
Hough 239
0650+1442
4E
7
OSS 79
0654+0641
4E
9
STF 995
0656+1102
4E
8
STF 856
0609+0703
5E
3
South 509
0614+1429
5E
1
74 Ori
0616+1216
5E
1
Hough 24
0618+0919
5E
2
STF 892 rej
0620+1220
5E
1
h725
0621+0944
5E
5
h726
Jonckheere
2742
0623+0854
5E
5
0623+1431
5E
4
A 2720
0623+1432
5E
4
Abetti 5
0633+1010
5E
5
STF 931 rej
0634+0759
5E
6
h2347
0651+0533
5E
9
STF 848
0608+1358
2M
1
Hough 230
0619+1347
3M
1
Tycho 241
0621+0857
4M
5
A. G. 114
0628+0834
4M
5
Component
A
B
A
B
C
A
B
A
B
A
B
A
B
C
BC
A
B
C
A
B
C
D
E
A
B
A
B
A
B
C
A
B
A
B
C
A
B
A
B
A
B
A
B
C
D
E
A
B
A
B
A
B
- 62 -
Mag
9.70
9.90
8.44
9.40
10.46
7.09
7.55
8.50
9.10
8.52
10.95
7.27
7.96
11.40
5.04
12.50
9.30
7.46
11.17
13.00
12.60
13.10
10.50
11.50
8.06
10.50
9.73
10.67
11.21
9.30
11.57
9.24
10.80
9.56
7.57
10.90
9.69
10.42
9.85
10.09
6.93
7.83
11.00
8.70
9.19
8.39
9.90
9.49
11.27
9.14
9.90
Separation
—
11.7 +
—
0.5 =
34.7 —
113.9 —
21.7 +
—
10.3 =
—
170.5 +
PA
—
175 —
146 +
34.7 —
89 =
—
293 =
—
50 +
—
198 =
3.1 +
—
29.7 +
205.2 +
—
4.1 25.0
30.2
45.0
—
30.0
—
23.7 +
—
22.4 23.0 +
—
60.0
—
1.2 +
66.9
—
102.5 —
23.7 +
—
21.9 +
—
2.4 =
15.9 +
28.3 43.3 +
—
1.7 +
—
2.1
—
5.0 =
245 —
171 +
205.2 +
—
157 +
25.0
30.2
20
—
48
—
71 +
—
155 +
23.0 +
—
315
—
49 +
66.9
—
257 +
—
22 —
21 +
—
111 +
15.9 +
28.3 184 +
—
63 +
—
92
—
0=
Zone 160
Designation
Position
Rating
Map
OS 142
0630+0707
4M
6
A 2823
0643+0607
4M
9
STF 852
0609+0722
5M
3
A 2717
0615+0631
5M
3
A. G. 324
0620+1143
5M
2
Jonckheere
1951
0630+1348
5M
4
Smart 60
0634+1124
5M
5
STF 3118
0641+0950
5M
10
STF 949
0641+0542
5M
9
Jonckheere
666
0644+0729
5M
9
Jonckheere
273
0655+1235
5M
7
15 Mon
0641+0954
2D
10
Chevalier
Jonckheere
407
0607+0754
4D
3
0600+0942
5D
2
Engelmann 26
0617+0506
5D
3
STF 932
0634+1445
5D
4
30 Gem
0644+1314
5D
7
Component
A
B
C
A
B
A
B
C
A
B
C
D
A
B
A
B
C
A
B
A
B
A
B
A
B
C
A
B
C
A
B
C
D
E
A
B
A
B
A
B
C
D
A
B
A
B
- 63 -
Mag
7.12
11.23
11.10
7.87
10.13
10.68
11.70
12.50
7.69
8.13
13.00
10.57
9.33
11.50
10.73
10.90
10.54
8.60
11.40
9.60
10.30
8.90
9.90
8.36
11.10
11.10
9.91
10.34
13.30
4.66
7.99
9.80
9.60
9.90
8.84
11.20
8.74
10.37
5.71
11.36
10.00
13.02
8.39
8.59
4.49
11.10
Separation
—
8.6 +
27.0
—
4.5 +
—
10.1 +
44.5 +
—
0.5 +
14.1 +!
38.6
—
10.2 +
—
5.0 25.0
—
10.3
—
3.3 +
—
3.5 +
—
1.8 15.1 +
—
4.5 7.4 —
2.9 +
17.0 +
41.5 +
72.9 —
6
—
2.2 +
—
45.2 -!
178.8 -!
68.4 —
1.7 —
27.2 -
PA
—
354 =
27.0
—
300 =
—
310 44.5 +
—
350 =
14.1 +!
38.6
—
269 =
—
130 +
25.0
—
160
—
173 —
289 +
—
30 +
15.1 +
—
338 7.4 —
213 +
17.0 +
41.5 +
139 =
—
170
—
196 +
—
246 178.8 -!
68.4 —
310 -!
—
184 -
Zone 160
Deep Space
Object
NGC 2251
NGC 2261
Collinder 97
NGC 2264
Collinder 95
NGC 2254
Collinder 106
NGC 2143
NGC 2202
Collinder 92
Collinder 111
NGC 2169
NGC 2186
NGC 2236
NGC 2252
NGC 2237
NGC 2141
NGC 2194
NGC 2245
Trumpler 5
NGC 2259
Position
0635+0822
0639+0844
0631+0555
0641+0953
0631+0956
0636+0740
0637+0557
0603+0550
0617+0600
0623+0507
0639+0654
0608+1357
0612+0527
0630+0650
0635+0523
0632+0503
0603+1026
0614+1248
0633+1010
0637+0926
0639+1053
Rating
2E
2E
3E
3E
4E
4E
4E
5E
5E
5E
5E
5M
5M
5M
5M
3D
4D
4D
4D
4D
5D
Map
6
5
6
10
5
6
6
3
3
6
6
1
3
6
6
6
2
1
5
5
5
Type
Oc (III 2m)
Gn (E+R)
Oc (IV 3p)
Oc (III 3mn)
Oc (IV 2 p n)
Oc (I 1m)
Oc (III 3p)
Oc
Oc
Oc
Oc
Oc (III 3m)
Oc (II 2m)
Oc (II 2m)
Oc (III 2mn)
Gn (E)
Oc (II 3r)
Oc (II 2r)
Gn (R)
Oc (II 3rn)
Oc (II 2pn)
- 64 -
Specifications
Surface
Mag
Br
7.3
10.7
5.4
3.9
9.1
4.6
10.0
Population
30
15
40
10
50
20
8.5
7.0
5.9
8.7
8.5
7.7
5.5
10.8
8.5
100
100
10.0
10.8
150
25
30
30
50
30