Zone 159, Master Map
ο2
c
λ
φ2
Meissa
φ1
f
d
Betelgeuse
γ
+06°00'
α
+08°00'
µ
+10°00'
+12°00'
e
+14°00'
+16°00'
Normal View
Zone Master, Normal View, 10 deg FOV
Bellatrix
Orion
ω
06h 00m
05h 52m
05h 44m
05h 36m
05h 28m
05h 20m
05h 12m
05h 04m
Zone 159, Map 1
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+14°00'
+15°00'
h3273
South 468
+12°00'
+13°00'
Weisse 5
Dolidze Dz 2
STF 724
+11°00'
South 463
Kustner 21
Jonckheere 323
PK190-17.1PK 190-17.1
STF 626 rej
16 Ori
05h 30m
05h 25m
05h 20m
05h 15m
05h 10m
05h 05m
05h 00m
Zone 159, Map 1
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+15°00'
h3273
+14°00'
Sh 49
South 468
+12°00'
+13°00'
Weisse 5
Dolidze Dz 2
+11°00'
South 463
Kustner 21
Jonckheere 323
PK190-17.1
PK 190-17.1
STF 626 rej
STF 626 rej
16 Ori
05h 00m
05h 05m
05h 10m
05h 15m
05h 20m
05h 25m
05h 30m
Zone 159, Map 2
Normal Image
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
16 Ori
h691
+08°00'
14 Ori
STF 643
STF 664
+07°00'
OS 100
Dolidze 21
Dolidze 17
OSS 62
γ
+09°00'
13 Ori
Bellatrix
+06°00'
Gamma Ori
A. G. 91
OS 106
NGC 1819
05h 30m
05h 25m
05h 20m
STF 678
05h 15m
05h 10m
05h 05m
05h 00m
Zone 159, Map 2
Mirror Image
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
16 Ori
13 Ori
+09°00'
h691
14 Ori
STF 643
Dolidze 17
Dolidze 21
OSS 62
Bellatrix
+06°00'
Gamma Oriγ
+07°00'
+08°00'
STF 664
OS 100
A. G. 91
OS 106
NGC 1819
STF 678
05h 00m
05h 05m
05h 10m
05h 15m
05h 20m
05h 25m
05h 30m
Zone 159, Map 3
Normal Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
OS 115
Jonckheere 656
South 503
+14°00'
Hough 20
133 Tau
South 502
Fox 142
+13°00'
A 118
Barton 1188
Barton 1187
OS 113
A. G. 315
Jonckheere 1090
134 Tau
Bur 561
+12°00'
A. G. 318
+11°00'
Kuiper 21
A. G. 317
STF 724
A. G. 320
A. G. 319
OS 123
OS 111 STF 726
STF 763
Argelander 63
λ
Collinder 69
Meissa
Lambda Ori
Jonckheere 407
06h 00m
05h 55m
05h 50m
05h 45m
05h 40m
05h 35m
05h 30m
Zone 159, Map 3
Mirror Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
OS 115
+14°00'
Jonckheere 656
Hough 20
South 503
South 502
133 Tau
Fox 142
+13°00'
A 118
OS 113
Jonckheere 1090
A. G. 315
134 Tau
+12°00'
Bur 561
A. G. 318
+11°00'
Kuiper 21
A. G. 317
STF 724
A. G. 320
A. G. 319
STF 726
OS 111
OS 123
STF 763
Argelander 63
Collinder 69
Meissaλ
Lambda Ori
05h 30m
05h 35m
05h 40m
05h 45m
05h 50m
05h 55m
06h 00m
Zone 159, Map 4
Normal Image
OS 123
OS 111 STF 726
STF 763
Argelander 63
λ
Collinder 69
Meissa
Lambda Ori
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Jonckheere 407
Jonckheere 251
φ1
NGC 2022
+08°00'
STF 820
+09°00'
φ2
PK196-10.1
NGC 2022
Betelgeuse
Alpha Ori
OS 518
STF 744
+07°00'
α
STF 817
h712
32 Ori
STF 816
Hipparcos 738
STF 815
STF 818
06h 00m
05h 55m
+06°00'
52 Ori
STF 797
05h 50m
05h 45m
05h 40m
05h 35m
05h 30m
Zone 159, Map 4
Mirror Image
STF 726
OS 111
OS 123
STF 763
Argelander 63
Collinder 69
Meissaλ
Lambda Ori
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Jonckheere 251
φ1
PK196-10.1
NGC 2022 NGC 2022
+08°00'
STF 820
+09°00'
φ2
Betelgeuse
OS 518
STF 817
+07°00'
Alpha Oriα
STF 744
h712
32 Ori
STF 816
+06°00'
52 Ori
STF 815
Hipparcos 738
STF 818
05h 30m
05h 35m
05h 40m
05h 45m
05h 50m
05h 55m
06h 00m
Zone 159
54 Double Stars, 2 Planetary Nebulae, 4 Open Clusters
Flamsteed
H
13 Ori .......................................................... 9
133 Tau ..................................................... 23
134 Tau ..................................................... 24
14 Ori ........................................................ 11
16 Ori ........................................................ 10
32 Ori ........................................................ 27
52 Ori ........................................................ 27
h691........................................................... 10
h712........................................................... 31
Hipparcos 738 ........................................... 33
Hough 20................................................... 23
J
Jonckheere 1090........................................ 21
Jonckheere 251.......................................... 28
Jonckheere 323............................................ 5
Jonckheere 656.......................................... 24
A
A 118......................................................... 22
A. G. 315................................................... 16
A. G. 317................................................... 17
A. G. 318................................................... 17
A. G. 319................................................... 18
A. G. 320................................................... 19
A. G. 91....................................................... 7
Alpha Ori .................................................. 34
Argelander 63............................................ 14
K
Kuiper 21 .................................................. 21
Kustner 21................................................... 5
L
Lambda Ori ............................................... 29
N
B
NGC 2022 ................................................. 37
Barton 1187............................................... 15
Bur 561...................................................... 18
O
OS 100 ........................................................ 8
OS 106 ........................................................ 8
OS 111 ...................................................... 22
OS 113 ...................................................... 20
OS 123 ...................................................... 26
OS 518 ...................................................... 33
OSS 62 ........................................................ 9
C
Collinder 69 .............................................. 36
D
Dolidze 17................................................. 13
Dolidze-Dzimselejsvili 2 ............................ 6
Dolidze 21................................................. 13
P
F
PK 190-17.1 ................................................ 6
Fox 142 ..................................................... 20
S
G
South 463 .................................................... 4
South 468 .................................................... 3
Gamma Ori................................................ 12
-1-
Zone 159
STF 763..................................................... 16
STF 815..................................................... 30
STF 816..................................................... 34
STF 817..................................................... 31
STF 820..................................................... 32
South 502 .................................................. 14
South 503 .................................................. 19
STF 626 rej ................................................. 3
STF 643..................................................... 10
STF 664....................................................... 7
STF 724..................................................... 15
STF 726..................................................... 25
STF 744..................................................... 32
W
Weisse 5 ...................................................... 4
-2-
Zone 159
Zone 159, Map 1
Double Stars
Easy
South 468
Rating: 3 E
HD 33335; SAO 94364
Position: 0510+1359
A
B
Magnitude
8.62
8.86
Separation PA
—
—
26.5 +
166 =
Year
—
1991
Spectra
F8 V
F8 V
Colors
W
W
Notes:
1825: 26.4 @ 166. 15 measurements. The stars share common proper motion.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.60 inches; B = 3.60 inches.
Separation: AB = 9.93 miles.
Distance (LY): 240
Total luminosity (Suns): 3
STF 626 rej
Rating: 4 E
HD 31918; SAO 94249
Position: 0500+1023
A
B
C
D
Magnitude
8.00
10.40
10.60
13.50
Separation
—
24.6 +
90.1 +
115.0 +
PA
—
241 =
108 =
260 -
Notes:
AB 1901: 24.2 @ 241. 7 measurements.
AC 1901: 90.0 @ 108. 5 measurements.
-3-
Year
—
1989
1989
1989
Spectra
A3
Colors
W
B
No
No
Zone 159
AD 1901: 108.1 @ 278. 5 measurements.
Observations:
C8 at 104x. It forms a right triangle with two 8.6m stars. Note the two 12m stars
flanking it and just to the S.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.39 inches.
Separation: AB = 16.5 miles; AC = 60.5 miles; AD = 77.2 miles.
Distance (LY): 430
Total luminosity (Suns): 10
South 463
Rating: 4 E
HD 32202; SAO 94274
Position: 0502+1122
A
B
Magnitude
7.17
10.08
Separation PA
—
—
32.5 +
29 -
Year
—
1991
Spectra
B8
G5
Colors
W
B
Notes:
1825: 33.6 @ 30. 17 measurements. The stars share common proper motion.
Observations:
C8 at 104x. It forms a large triangle with two 8.8m stars.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.04 inches.
Separation: AB = 76.1 miles.
Distance (LY): 1,500
Total luminosity (Suns): 216
Weisse 5
Rating: 4 E
ADS 3633
Position: 0503+1321
A
B
Magnitude
9.95
10.17
Separation PA
—
—
5.0 +
83 +
-4-
Year
—
1994
Spectra
G5
Colors
Y
W
Zone 159
Notes:
1893: 4.6 @ 82. 16 measurements.
Observations:
C8 at 104x. It was split at 104x.
Kustner 21
Rating: 4 E
ADS 3695; HD 240779
Position: 0510+1100
A
B
Magnitude
9.95
10.80
Separation PA
—
—
5.0 210 -
Year
—
1991
Spectra
G5
Colors
yW
W
Notes:
1901: 5.2 @ 214. 13 measurements.
May be optical because Hipparcos gives different distances (333 and 90 light years).
Observations:
C11 at 115x.
Jonckheere 323
Rating: 5 E
ADS 3736; HD 33337
Position: 0510+1053
A
B
C
Magnitude
7.64
9.80
11.01
Separation
—
3.6 +
84.6
PA
—
164 +
186
Notes:
AB 1911: 3.0 @ 163. 14 measurements.
AC 1 measurement.
Observations:
C8 at 104x.
-5-
Year
—
1991
1940
Spectra
G5
Colors
Y
No
W
Zone 159
Deep Sky Objects
Easy
Dolidze-Dzimselejsvili 2
Rating: 5 E
Position: 0524+1128
Type: OC
Cluster population: 12
Magnitude: 10.0
Dimensions: 12.0'
Observations:
C11 at 98x. Loose, scattered and sparse, it is dominated by a 10m trapezoid. I
counted 9 stars.
Difficult
PK 190-17.1
Other Names: Jones 320
Rating: 4 D
Position: 0506+1042
Type: Pn
Dimensions: 11'' x 8''
Class: 2(4)
Magnitude: 12.9
Notes:
The central star is 13.5m.
Observations:
C8 at 206x with O-III filter. It showed up as a uniform round patch.
-6-
Zone 159
Zone 159, Map 2
Double Stars
Easy
STF 664
Chevalier 79; ADS 3827; HD 34081
Position: 0515+0825
A
B
Magnitude
7.25
7.97
Rating: 2 E
Separation PA
—
—
4.6 188 +
Year
—
1994
Spectra
A9 IV
Colors
bW
Y
Notes:
1829: 5.0 @ 168. 34 measurements.
Observations:
C8 at 104x.
C11 at 115x. Very nice!
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.38 inches.
Separation: AB = 2.28 miles.
Distance (LY): 318
Total luminosity (Suns): 14
A. G. 91
Position: 0510+0605
A
B
Magnitude
8.56
10.20
Rating: 3 E
Separation PA
—
—
11.7 216 =
Year
—
1962
Spectra
G5
Colors
yW
W
Notes:
1895: 12.1 @ 216. 5 measurements. The stars show similar proper motions.
Observations:
C8 at 104x. Moderately rich field.
-7-
Zone 159
OS 100
Rating: 3 E
ADS 3737; HD 33340; SAO 112481
Position: 0510+0810
A
B
Magnitude
7.02
10.33
Separation PA
—
—
3.7 259 +
Year
—
1991
Spectra
F8 IV
Colors
yW
W
Notes:
1848: 4.3 @ 242. 32 measurements.
Observations:
C8 at 206x. This one will be a test of your observing skills.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.8 inches.
Separation: AB = 1.59 miles.
Distance (LY): 275
Total luminosity (Suns): 10
OS 106
Rating: 3 E
ADS 3949; HD 35066; SAO 112681
Position: 0522+0524
A
B
Magnitude
7.19
10.44
Separation PA
—
—
9.5 +
40 -
Year
—
1991
Spectra
F5 V
Colors
W
R!!
Notes:
1844: 9.3 @ 42. 12 measurements.
The stars show similar proper motions.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.9 inches.
Separation: AB = 2.62 miles.
Distance (LY): 177
Total luminosity (Suns): 3.36
-8-
Zone 159
OSS 62
Rating: 4 E
HD 33645; SAO 112511
Position: 0512+0650
A
B
Magnitude
7.46
7.60
Separation PA
—
—
124.6 +
51 +
Year
—
1997
Spectra
K0
K0
Colors
Y
Y
Notes:
1875: 123.4 @ 48. 6 measurements.
Hipparcos/Tycho data show different distances for these stars (650 and 2,590 light
years); they may be optical. The stars have different proper motions.
Observations:
C8 at 104x. A nice asterism of six 12m stars lies 5 min S.
13 Ori
OS 561; HD 33021; SAO 112436
Position: 0508+0928
A
B
Magnitude
6.15
9.84
Rating: 5 E
Separation PA
—
—
124
264
Year
—
1909
Spectra
G0 IV
Colors
yW
bW
Notes:
The star is a member of the Wolf 630 group.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.55 inches; B less than 1 inch.
Separation: AB = 18.8 miles.
Distance (LY): 92
Total luminosity (Suns): 2.06
-9-
Zone 159
Moderate
STF 643
Rating: 4 M
ADS 3712; HD 33055; SAO 112442
Position: 0508+0824
A
B
Magnitude
9.58
9.61
Separation PA
—
—
2.4 304 +
Year
—
1997
Spectra
K2
Colors
O
O
Notes:
1831: 2.7 @ 295. 43 measurements.
Observations:
C8 at 206x.
h691
Rating: 5 M
HD 240582; SAO 112401
Position: 0505+0914
A
B
Magnitude
9.35
13.65
Separation PA
—
—
32.3
156
Year
—
1897
Spectra
K7
Colors
W
bW?
Notes:
1 measurement.
Observations:
C8 at 104x. Moderate field.
16 Ori
Bpm 75; OS 561; HD 33254; SAO 112467
Position: 0509+0949
A
B
C
Magnitude
5.43
12.70
10.50
Separation
—
89
168
Rating: 5 M
PA
—
122
228
Year
—
1909
Spectra
A2 III
Colors
W
?
W
Notes:
Star A is a spectroscopic binary (155.83 day period) and may be variable. It is a
member of the Hyades cluster (star #130) and is 2.2 times as big as the Sun.
- 10 -
Zone 159
The stars have different proper motions.
Observations:
C8 at 104x. Star B is difficult due to A's glare.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.1 inches.
Separation: AB = 24.4 miles; AC = 46.1 miles.
Distance (LY): 176
Total luminosity (Suns): 17.23
Difficult
14 Ori
OS 98; ADS 3711; HD 33054; SAO 112440
Position: 0508+0829
A
B
Magnitude
5.79
6.68
Rating: 5 D
Separation PA
—
—
0.7 322 +
Year
—
1999
Spectra
K2
Am
Colors
Y
B
Notes:
1844 (O. Struve): 1.2 @ 218. 1912 (Greenwich Observatory): 0.8 @ 155. Over 100
measurements.
The orbital period is given various as 160 years or 198.9 years (Baize, 1969). The
Baize orbit has a = 1.04" and retrograde motion.
The mean mass of the system is 1.7 Suns.
Another pair, STF 643 (6' S) shares the same proper motion.
Am stars, like the primary of 14 Ori, are peculiar Main Sequence stars (usually of
class A0 to F0) with an overabundance of heavy elements and rare earths while having
sub-normal amounts of iron. They exhibit strong absorption lines and weak traces of
calcium and scandium. They rotate slower than normal A stars and are almost always
found as short-period spectroscopic binaries. They are sometimes also called "metallic
line A stars".
The probable explanation for these stars is that the A star's rotation has been slowed
by tidal forces with the companion, resulting in an unusually stable outer atmosphere
where heavy elements can bubble up from deep within the star where they are formed.
Observations:
C8 at 280x. Notched.
- 11 -
Zone 159
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 22.8 inches; B = 6.91 inches.
Separation: AB = 1,109 feet.
Distance (LY): 194
Total luminosity (Suns): 19.2
Gamma Ori
Rating: 5 D
24 Ori; Bellatrix, "the female warrior"; Bpm 78; HD 35468; SAO 112740
Position: 0525+0620
A
B
Magnitude
1.64
13.93
Separation PA
—
—
179.9 +
144 =
Year
—
1909
Spectra
B2 III
Colors
bW
?
Notes:
1879: 178.2 @ 144. 2 measurements.
This star is a member of the Ori OB1 Association. It possess an expanding shell (fed
up material travelling 1,600 kps) and is a spectroscopic binary, and an infra-red source.
The star's diameter has been measured at 0.00071".
From James Kaler's Star Notes:
It is one of the hotter naked eye stars. With a temperature of 21,500 Kelvin (at the hot
end of class B), it is in league with Spica, Adhara, and Shaula. If Bellatrix has not already
ceased hydrogen fusion in its core, it will soon, and is even now classed as a "giant."
Such hot giants however, are nowhere near as large as the classical orange and red giants.
(Carrying eight or nine solar masses, Bellatrix will become such an orange giant in at
most a few million years, and then die quietly as a massive white dwarf; it is not quite
large enough to explode).
The star's great luminosity comes not so much from its diameter (six times that of the
Sun), but from its high temperature. The small but measurable angular diameter gives the
same physical dimension as calculation from luminosity and temperature, telling us that
all our measurements are right on the mark. Bellatrix was long thought to be part of the
physical association of stars that makes much of Orion, but modern measurements of
distance place it considerably closer than the others, and it now seems to be independent
of them. More important, Bellatrix was long taken as a standard for the measurement of
stellar brightnesses, against which astronomers can follow the meanderings of variable
stars (those that vary in brightness). But Bellatrix perversely seems to vary a bit too, by a
few percent over an undetermined period. As our ability to measure stellar brightnesses
gets better and better, it is becoming more and more difficult to find stars that are entirely
stable.
- 12 -
Zone 159
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.0 inches.
Separation: AB = 68.0 miles.
Distance (LY): 243
Total luminosity (Suns): 6,400
Deep Sky Objects
Easy
Dolidze 17
Rating: 4 E
Position: 0522+0707
Type: Oc
Dimensions: 12.0'
Class: IV 2 p
Magnitude: 10.0
Observations:
C11 at 98x. Four brighter stars in a rhombus plus one more bright star and five very
faint ones. I thought it about 10' x 20' in dimensions, in a N-S axis.
Dolidze 21
Rating: 4 E
Position: 0527+0704
Type: OC
Dimensions: 12.0'
Class: IV 2 p
Magnitude: 8.0
Observations:
C11 at 98x. A large and sparse group in an uneven pentagon shape. An 8m Y star
plus 4 of 10m, 4 of 11m, and 4 more fainter.
- 13 -
Zone 159
Zone 159, Map 3
Double Stars
Easy
South 502
Rating: 2 E
HD 39700; SAO 94983
Position: 0555+1351
A
B
Magnitude
7.90
8.29
Separation PA
—
—
45.3 131 +
Year
—
1995
Spectra
O6p
A0
Colors
W
W
Notes:
1874: 45.7 @ 130. 15 measurements. Star A is a spectroscopic binary. The stars
share common proper motion.
Observations:
C8 at 104x. A rich field lies to the S.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 0.35 inches; B = 6.23 inches.
Separation: AB = 622 miles.
Distance (LY): 8,800
Total luminosity (Suns): 7,300
Argelander 63
Rating: 3 E
HD 249622; SAO 95037
Position: 0557+1013
A
B
Magnitude
8.68
9.10
Separation PA
—
—
32.8 67 +
Year
—
1991
Spectra
F2
G
Colors
W
W
Notes:
1862: 35.6 @ 65. 13 measurements. The stars have different proper motions and
Hipparcos gives different distances (512 and 491 light years).
A has an 11.97m companion at only 0.5 @ 152 (1991).
- 14 -
Zone 159
Observations:
C8 at 104x.
Barton 1187
Position: 0559+1306
A
B
Magnitude
10.38
10.40
Rating: 3 E
Separation PA
—
—
5.7 +
177 +
Year
—
1991
Spectra
Colors
W
W
Notes:
1908: 5.3 @ 155. 3 measurements.
Observations:
C11 at 115x.
STF 724
Rating: 4 E
ADS 4104; HD 244315
Position: 0530+1101
A
B
Magnitude
9.20
10.50
Separation PA
—
—
6.9 =
251 +
Year
—
1975
Spectra
A2
Colors
W
O
Notes:
1829: 6.9 @ 242. 7 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.57 inches.
Separation: AB = 1.29 miles.
Distance (LY): 120
Total luminosity (Suns): 0.3
- 15 -
Zone 159
A. G. 315
Position: 0538+1251
A
B
Magnitude
9.57
10.26
Rating: 4 E
Separation PA
—
—
30.2 160 +
Year
—
1991
Spectra
G0
Colors
W
W
Notes:
1895: 30.6 @ 159. 6 measurements. May be optical because Hipparcos gives
different distances (134 and 20 light years).
Observations:
C8 at 104x; moderately rich field.
C11 at 115x.
STF 763
Rating: 4 E
ADS 4245; HD 37478; SAO 94729
Position: 0539+1015
A
B
Magnitude
8.25
8.93
Separation PA
—
—
6.2 +
318 -
Year
—
1991
Spectra
F8 V?
Colors
W
rO
Notes:
1830: 5.8 @ 320. 19 measurements. The stars have different proper motions.
Observations:
C8 at 206x. Webb saw them as yW and Y.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 1.83 miles.
Distance (LY): 189
Total luminosity (Suns): 1.7
- 16 -
Zone 159
A. G. 317
Rating: 4 E
HD 38505; SAO 94850
Position: 0547+1103
A
B
Magnitude
7.60
10.84
Separation PA
—
—
25.4 +
237 +
Year
—
1991
Spectra
G5
Colors
W
?
Notes:
1895: 20.1 @ 214. 9 measurements.
Observations:
C8 at 104x; at the N end of a short, bright chain.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.9 inches.
Separation: AB = 16.6 miles.
Distance (LY): 419
Total luminosity (Suns): 13.2
A. G. 318
Rating: 4 E
HD 38587; SAO 94860
Position: 0548+1215
A
B
C
Magnitude
8.63
12.00
9.96
Separation
—
31.3 +
39.8 -
PA
—
114 +
311 +
Year
—
1952
1952
Spectra
A
Colors
W
?
W
Notes:
AB 1903: 27.7 @ 113. 2 measurements.
AC 1893: 41.2 @ 310. 3 measurements.
May be optical because Tycho gives different distances (100 and 25 light years).
Observations:
C11 at 115x.
- 17 -
Zone 159
Bur 561
A. G.; ADS 4386; HD 38672; SAO 94868
Position: 0548+1225
A
B
C
Magnitude
6.68
12.97
11.28
Separation
—
18.9 77.1
Rating: 4 E
PA
—
334
Year
—
1919
1917
Spectra
B5
Colors
W
No
B
Notes:
AB 1878: 19.7 @ 4. 7 measurements.
AC 1 measurement.
Observations:
C8 at 104x. It lies with a four 7m stars that form a long, low trapezoid oriented to pa
45.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.4 inches.
Separation: AB = 28.6 miles; AC = 117 miles.
Distance (LY): 970
Total luminosity (Suns): 186
A. G. 319
Rating: 4 E
HD 39263; SAO 94935
Position: 0552+1026
A
B
C
Magnitude
9.55
10.17
11.91
Separation
—
35.4 35.4 +
PA
—
356 +
166
Year
—
1992
1992
Spectra
A0
Colors
W
W
?
Notes:
AB 1893: 34.8 @ 356. 4 measurements.
AC 1903: 30 @ ??. 2 measurements.
May be optical because Tycho gives different distances (560 and 34 light years).
Observations:
C11 at 115x.
- 18 -
Zone 159
South 503
Bur; LPM 5667 (E); ADS 4519; HD 39881
Position: 0556+1356
A
B
C
D
Magnitude
6.67
8.41
10.63
8.16
Separation
—
69.6 +!!
43.6 +!
290.6 +!!
PA
—
321 +?
308 +!!
334 -
Rating: 4 E
Year
—
1991
1984
1984
Spectra
G5 IV
Colors
yW
W
?
W
Notes:
AB 1825: 39.9 @ 134. 55 measurements. Different proper motions. Optical.
Hipparcos gives different distances (91 and 195 light years). Quadrant reversal?
AC 1878: 28.1 @ 157. 15 measurements.
AD 1825: 201.8 @ 337. 10 measurements. Different proper motions.
Observations:
C11 at 115x.
A. G. 320
Rating: 4 E
HD 40007; SAO 95019
Position: 0557+1033
A
B
Magnitude
9.86
9.48
Separation PA
—
—
22.5 +
13 +?
Year
—
1991
Spectra
G5
Colors
W
W
Notes:
1894: 22.4 @ 192. 10 measurements. Quadrant reversal?
Observations:
C8 at 104x. It forms a nice triangle with two 10m stars.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 21.5 inches.
Separation: AB = 4.84 miles.
Distance (LY): 138
Total luminosity (Suns): 0.4
- 19 -
Zone 159
OS 113
Rating: 5 E
ADS 4253; HD 37560; SAO 94737
Position: 0540+1301
A
B
Magnitude
7.09
10.43
Separation PA
—
—
10.2 +
28 -
Year
—
1898
Spectra
A0
B9
Colors
W
?
Notes:
1843: 9.8 @ 31. 4 measurements.
Hipparcos/Tycho data show different distances for these stars (500 and 33 light
years); they may be optical.
Observations:
C8 at 206x.
Fox 142
Rating: 5 E
ADS 4282; HD 37870; SAO 94783
Position: 0542+1336
A
B
Magnitude
8.75
11.41
Separation PA
—
—
6.0 100 +
Year
—
1991
Spectra
A0
Colors
W
Notes:
1909: 6.5 @ 99. 4 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 19.2 inches.
Separation: AB = 22.5 miles.
Distance (LY): 2,400
Total luminosity (Suns): 155
- 20 -
Zone 159
Jonckheere 1090
Rating: 5 E
ADS 4461; HD 39306; SAO 94944
Position: 0552+1253
A
B
Magnitude
8.77
12.10
Separation PA
—
—
74.9 +
5-
Year
—
1958
Spectra
A0
Colors
W
W?
Notes:
1915: 69.5 @ 6. 2 measurements.
There are two more very faint comes.
Observations:
C8 at 104x. Moderate field.
Kuiper 21
Rating: 5 E
HD 39662; SAO 94979
Position: 0555+1146
A
B
Magnitude
6.59
10.88
Separation PA
—
—
22.7
196
Year
—
1958
Spectra
A2 V
Colors
W
?
Notes:
1 measurement.
Observations:
C8 at 83x.
Scale Model (in which the Sun is a baseball):
Component
Diameter, in
A
8.2
B
Distance (LY): 305
Distance, mi
na
10.8
Total luminosity (Suns): 17.32
- 21 -
Zone 159
Moderate
OS 111
Rating: 3 M
HD 36881; SAO 94671
Position: 0535+1014
A
B
Magnitude
5.60
9.61
Separation PA
—
—
2.8 352 -
Year
—
1991
Spectra
B9 IIIp
Colors
W
W
Notes:
1847: 2.9 @ 353. 13 measurements.
The primary is a single-lined
spectroscopic binary, period of 1857 days.
Scale model (in which the Sun is the size of
a baseball):
Diameter: A = 1.10 inches.
Separation: AB = 6.4 miles.
Distance (LY): 1,460
Total luminosity (Suns): 175,000
OS 111
Observed with C11
on 11/28/03; s5, t6
Magnification: 339x
A 118
Rating: 3 M
ADS 4315; HD 38144
Position: 0544+1319
A
B
Magnitude
9.56
9.74
Separation PA
—
—
2.6 +
0+
Notes:
1901: 2.5 @ 358. 14 measurements.
Observations:
C8 at 280x.
- 22 -
Year
—
1991
Spectra
A
Colors
W
W
Zone 159
Hough 20
Rating: 4 M
ADS 4497; HD 39729; SAO 94990
Position: 0555+1413
A
B
C
Magnitude
6.63
11.80
10.91
Separation
—
7.8 =
50.1 -
PA
—
274 289 +
Year
—
1937
1902
Spectra
K0 II
Colors
rO
?
?
Notes:
AB 1886: 7.8 @ 277. 5 measurements.
AC 1886: 50.2 @ 287. 2 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 15.4 inches.
Separation: AB = 13.6 miles; AC = 87.6 miles.
Distance (LY): 1,120
Total luminosity (Suns): 205
133 Tau
h3279; ADS 4381; HD 38622; SAO 94864
Position: 0548+1354
A
B
C
Magnitude
5.29
12.17
12.01
Separation
—
17.8 24.6 -
Rating: 5 M
PA
—
301 +
181 =
Notes:
AB 1877: 17.9 @ 299. 5 measurements.
AC 1877: 25.0 @ 181. 5 measurements.
The system belongs to the Pleiades Group.
Observations:
C8 at 206x. Use averted vision for B.
- 23 -
Year
—
1927
1927
Spectra
B5 IV
Colors
W
?
?
Zone 159
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.3 inches.
Separation: AB = 22.2 miles; AC = 30.7 miles.
Distance (LY): 800
Total luminosity (Suns): 431
134 Tau
Bpm 84; HD 38899; SAO 94888
Position: 0550+1238
A
B
Magnitude
4.88
10.30
Rating: 5 M
Separation PA
—
—
118.9
129
Year
—
1909
Spectra
B9 IV
Colors
W
W?
Notes:
1 measurement.
Observations:
C8 at 206x. Use averted vision to glimpse B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 50.5 miles.
Distance (LY): 272
Total luminosity (Suns): 64.4
Jonckheere 656
Olivier 153; Giacobini 13; ADS 4476; HD 248826;
Position: 0553+1424
A
B
Magnitude
10.09
10.90
Separation PA
—
—
4.2 +
107 +
Notes:
1911: 3.7 @ 100. 11 measurements.
Observations:
C11 at 115x.
- 24 -
Rating: 5 M
Year
—
1953
Spectra
F8
Colors
W
O?
Zone 159
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.8 inches.
Separation: AB = 2,006 feet.
Distance (LY): 59
Total luminosity (Suns): 0.037
Difficult
STF 726
Rating: 3 D
ADS 4113; HD 36263; SAO 94602
Position: 0531+1015
A
B
Magnitude
7.47
8.12
Separation PA
—
—
1.1 263 +
Year
—
1997
Spectra
B9 III?
Colors
W
Y
Notes:
1831: 1.2 @ 261. 30 measurements.
Observations:
C11 at 634x.
Scale model (in which the Sun is the size of a
baseball):
Diameter: A = 1.24 inches.
Separation: AB = 5.49 miles.
Distance (LY): 3,200
Total luminosity (Suns): 1,280
STF 726
Observed with C11
on 11/28/03; s5, t6
Magnification: 654x
- 25 -
Zone 159
OS 123
Rating: 3 D
ADS 4491; HD 39612; SAO 97975
Position: 0554+1015
A
B
Magnitude
7.04
8.90
Separation PA
—
—
2.1 +
186 +
Year
—
1995
Spectra
G5
Colors
Y
O
Notes:
1843: 2.0 @ 176. 39 measurements.
Observations:
C8 at 206x. Webb saw them as Y and W. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.8 inches.
Separation: AB = 2.10 miles.
Distance (LY): 630
Total luminosity (Suns): 59
- 26 -
Zone 159
Zone 159, Map 4
Double Stars
Easy
32 Ori
STF 728; ADS 4115; HD 36267; SAO 112849
Position: 0531+0557
A
B
Magnitude
4.19
5.58
Separation PA
—
—
1.2 +
47 +!!
Rating: 1 D
Year
—
1999
Spectra
B5 V
Colors
bW
W
Notes:
1830: 1.0 @ 204. Over 100 measurements. A premature orbit has been computed.
The motion is nearly rectilinear. Quadrant reversal?
Observations:
C11 at 634x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.4 inches.
Separation: AB = 2.86 feet.
Distance (LY): 289
Total luminosity (Suns): 176
52 Ori
STF 795; ADS 4390; HD 38710; SAO 113150
Position: 0548+0627
A
B
Magnitude
6.01
6.10
Separation PA
—
—
1.2 217 +
Rating: 1 D
Year
—
1999
Spectra
A5 V
F0 V
Colors
W
W
Notes:
1831: 1.8 @ 200. Over 100 measurements. Star A is a spectroscopic binary and
rotates at 110 kps.
- 27 -
Zone 159
Observations:
C8 at 280x. Webb saw them as yW and yW.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.80 inches; B = 5.70 inches.
Separation: AB = 4,746 feet.
Distance (LY): 480
Total luminosity (Suns): 132
52 Ori (STF 795)
Observed with C11
on 11/28/03; s5, t6
Magnification: 654x
Jonckheere 251
Rating: 5 D
ADS 4369; HD 38527; SAO 113124
Position: 0547+0931
A
B
Magnitude
5.78
10.97
Separation PA
—
—
16.2 285 +
Year
—
1961
Spectra
G8 III
Colors
Y
?
Notes:
1910: 16.5 @ 273. 6 measurements.
Hipparcos/Tycho mission data show different distances for these stars (300 and 9 light
years); they may be optical.
- 28 -
Zone 159
Observations:
C8 at 83x.
Lambda Ori
Rating: 2 E
39 Ori; Heka, "white spot", Meissa; STF 738; ADS 4179; HD 36861; SAO 112921
Position: 0535+0956
A
B
C
D
E
Magnitude
3.39
5.59
10.72
11.20
9.63
Separation
—
4.3 +
28.0 +
74.5 151.1 +
PA
—
44 +
182 287 +
279 =
Year
—
1997
1957
1981
1991
Spectra
O8 IIIe
O
Colors
W
Y
W
No
W
Notes:
AB 1821: 3.9 @ 41. Over 100 measurements. The AB pair shares a small proper
motion. The stars are about 2,400 AU apart. The system is a member of the Lambda Ori
Association. Star A is a spectroscopic binary.
AC 1830: 27.0 @ 184. 13 measurements. Hipparcos shows the C star to be at a
distance of 181 light years.
AD 1905: 78.4 @ 271. 8 measurements. Similar proper motion.
AE 1898: 149.8 @ 279. 5 measurements.
From James Kaler's Star Notes:
The star may not immediately overwhelm the eye, but it certainly does its
surroundings. Meissa is a double that consists of a hot (35,000 Kelvin!) fourth magnitude
class O star four seconds of arc away from a still-pretty-warm sixth magnitude B star
("only" 27,000 Kelvin). Though both stars (easily seen in a small telescope) are white,
various observers have seen lovely colors, showing how the eye can be fooled.
Meissa is also the luminary of a small cluster.
But it is most-famed for a huge surrounding ring of gas an amazing 150 light years
across that is illuminated (ionized) by the star, showing the immense power of these
(fortunately very rare) hot class O stars. This structure is set within an even larger ring of
interstellar dust and molecules. The rings may be leftover material from which Meissa
formed, compressed by the action of the O star. It is also possible that the rings were
created from the blast of another star that exploded in the neighborhood of Meissa a few
million years ago. With an immense mass nearly 25 times that of the Sun, explosion is
almost certain to be the fate of Meissa's brighter component. The fainter one, however, is
right at the edge of those that explode and those that turn into heavy white dwarfs,
condensed stars about the size of the Earth. The explosion of the more-massive star,
however, will outdo even that, as its stellar remnant will collapse to the size of a small
- 29 -
Zone 159
town and perhaps appear to future astronomers as a rapidly spinning neutron star, or
pulsar.
Observations:
C8 at 206x. Some observers report both as B or Y and R, or W and B, or even W and
O. Others report (W, G, W), or (bW, W), or (W, B), or (B, B). Webb says Y and V, and
wrote "whole region very fine."
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.2 inches.
Separation: AB = 7.10 miles; AC = 46.3 miles; AD = 123 miles; AE = 250 miles.
Distance (LY): 1,060
Total luminosity (Suns): 70,500
STF 815
Rating: 3 E
ADS 4496; HD 39731; SAO 113262
Position: 0555+0521
A
B
C
Magnitude
8.26
10.28
8.80
Separation
—
13.1 +
87.0 -
PA
—
137 =
309 +
Year
—
1991
1981
Spectra
G5 IV?
Colors
yW
pO
pB
Notes:
AB 1832: 12.7 @ 137. 11 measurements. The stars show a similar, but small, proper
motion.
AC 1864: 88.6 @ 307. 9 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.0 inches.
Separation: AB = 9.32 miles; AC = 61.9 miles.
Distance (LY): 456
Total luminosity (Suns): 14
- 30 -
Zone 159
h712
Rating: 4 E
ADS 4428
Position: 0550+0605
A
B
Magnitude
8.19
9.80
Separation PA
—
—
9.2 +
83 +
Year
—
1986
Spectra
A0
Colors
W
W
Notes:
1820: 8.0 @ 70. 8 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.19 inches.
Separation: AB = 3.38 miles.
Distance (LY): 236
Total luminosity (Suns): 2.83
STF 817
Rating: 4 E
ADS 4498; HD 39758; SAO 113266
Position: 0555+0702
A
B
Magnitude
8.68
8.93
Separation PA
—
—
18.6 +
73 +
Year
—
1991
Spectra
A5
K
Colors
Y?
O?
Notes:
1830: 18.5 @ 72. 25 measurements. The stars show a similar, but small, proper
motion.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.47 inches.
Separation: AB = 7.51 miles.
Distance (LY): 259
Total luminosity (Suns): 3.5
- 31 -
Zone 159
STF 820
Rating: 4 E
ADS 4516
Position: 0556+0859
A
B
Magnitude
8.90
9.79
Separation PA
—
—
5.0 +
111 +
Year
—
1991
Spectra
G0 IV?
Colors
Y
O
Notes:
1831: 4.7 @ 110. 15 measurements. The stars have different proper motions.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.6 inches.
Separation: AB = 4.68 miles.
Distance (LY): 600
Total luminosity (Suns): 14
STF 744
Rating: 5 E
ADS 4185; HD 36952; SAO 112931
Position: 0535+0716
A
B
Magnitude
9.20
11.36
Separation PA
—
—
13.2 +
268 +
Year
—
1991
Spectra
F8 V?
Colors
W
pB
Notes:
1829: 12.4 @ 267. 11 measurements.
Observations:
C8 at 200x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.4 inches.
Separation: AB = 10.9 miles.
Distance (LY): 530
Total luminosity (Suns): 5.8
- 32 -
Zone 159
OS 518
Rating: 5 E
ADS 4225; HD 37301; SAO 112975
Position: 0538+0715
A
B
C
Magnitude
9.09
12.80
12.45
Separation
—
2.1 +
39.7 -
PA
—
240 236 -
Year
—
1930
1984
Spectra
F5 V
Colors
W
No
W
Notes:
AB 1898: 1.5 @ 284. 3 measurements.
AC 1898: 40.3 @ 239. 5 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.3 inches.
Separation: AB = 1.24 miles; AC = 23.4 miles.
Distance (LY): 377
Total luminosity (Suns): 3.3
Moderate
Hipparcos 738
Rating: 4 M
HD 36797; SAO 112906
Position: 0534+0525
A
B
Magnitude
8.26
11.46
Separation PA
—
—
7.9 +
3-
Notes:
1898: 7.6 @ 5. 2 measurements.
Observations:
C11 at 115x. Nice field.
- 33 -
Year
—
1991
Spectra
A0 V
Colors
W
?
Zone 159
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.8 inches.
Separation: AB = 10.7 miles.
Distance (LY): 870
Total luminosity (Suns): 31
STF 816
Rating: 4 M
ADS 4499; HD 39773; SAO 113267
Position: 0555+0551
A
B
Magnitude
6.80
9.18
Separation PA
—
—
4.4 +
288 -
Year
—
1991
Spectra
B9
Colors
W
?
Notes:
1830: 4.3 @ 289. 20 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.63 inches.
Separation: AB = 4.11 miles.
Distance (LY): 600
Total luminosity (Suns): 55
Alpha Ori
Rating: 4 M
58 Ori; Betelgeuse, "the armpit"; ADS 4506; HD 39801; SAO 113271; H VI 39
Position: 0555+0724
A
B
Magnitude
0.45
11.00
Separation PA
—
—
174.4 +! 153 +
Year
—
1917
Spectra
M Ia
Colors
rO!!
bW
Notes:
1786: 161.8 @ 152. 7 measurements.
The luminosity varies over a 3 year period (a discovery first made by John Herschel),
but only 13% of its emission is in visible light (the rest is infra-red).
It varies between 550 and 920 times bigger than the Sun (a fact known from
interferometric measurements). This means it would swallow Mars (and possibly Jupiter)
- 34 -
Zone 159
if it were in the place of the Sun (it has a diameter of 4.7 AU). It is only 3,100o K at the
surface, has 20 solar masses, and is only 0.0001 as dense as air. In volume, it would hold
160 million suns (at swollen maximum). Thus you can see that Betelgeuse is not much
more than a red-hot vacuum!
Betelgeuse is undergoing rapid mass loss (at the breakneck pace of 1 solar mass per
300,000 years or so) through a strong solar wind (maybe we should say "hurricane" in
Betelgeuse’s case?). This has created a halo cloud around the star some trillion miles
across.
Betelgeuse was the first star, outside the Sun, to have its disk sized. This was done by
interferometry conducted by Albert Michelson and Francis Pease at Mount Wilson in
1920 (0.047"). Then, in the mid-1970’s, astronomers at Kitt Peak National Observatory
near Tucson succeeded in producing an image of Betelgeuse’s disk using a technique
called speckle interferometry. The results show large dark areas on the star’s surface,
indicating the star is somewhat unstable (which its variability confirms).
Astronomers at Harvard Observatory, using the same speckle interferometry
technique, have discovered that Betelgeuse has two very close companions— one so
close that at periastron, it actually dives below the surface of Betelgeuse’s huge
chromosphere! The closer star has a 2.1 year period and averages 5 AU from Betelgeuse,
while the farther star has a 65 year period and orbits about 48AU away.
Radio observations suggest huge convection cells that cause the outer atmosphere of
the star to have an irregular, lobed shape several times larger than the visible star we see.
In fact, this radio image shows a star that would engulf Saturn's orbit!
From James Kaler's Star Notes:
The name Betelgeuse is a corruption of the Arabic "yad al jauza," which means the
"hand of al-jauza," al-jauza the ancient Arabs' "Central One," a mysterious woman.
Betelgeuse is one of the larger stars that can be seen, indeed one of the larger stars to
be found anywhere. Its measured angular diameter yields a radius 630 times that of the
Sun, 2.9 astronomical units. If placed at the Sun, the star would go 55% of the way to the
orbit of the planet Jupiter. The star is so large that it is the first ever actually directly
imaged as a disk from Earth (by the Hubble Space Telescope).
Betelgeuse is clearly a highly evolved star, one whose central hydrogen fuel supply
has run out. As a result, the core contracted into a hot dense state, and the outer portions
swelled outward. We do not really know the star's condition at the moment, but the odds
are that it is now in the process of fusing helium into carbon and oxygen in its core.
Betelgeuse is variable over long time periods, is ejecting part of itself through a strong
wind, and is surrounded by a huge shell of dust of its own making. The wind and
variability are perhaps related to huge hot spots on the star's surface, one of which was
seen by Hubble. Betelgeuse is also surrounded by some controversy.
From theory, its initial mass should have fallen somewhere between 12 and about 17
times that of the Sun. If at the high end, the core will fuse elements through neon,
magnesium, sodium, and silicon all the way to iron. It will then collapse, and Betelgeuse
will blow up as a "supernova", most likely leaving a compact neutron star about the size
- 35 -
Zone 159
of a small town behind. If it were to explode today, it would become as bright as a
crescent Moon, would cast strong shadows on the ground, and would be seen easily in
full daylight. If the star is near or under the lower end of the range, then Betelgeuse may
eventually become a shrunken and dense white dwarf about the size of Earth. Even then,
however, it will be different. Most white dwarfs are made of carbon and oxygen, whereas
Betelgeuse has enough mass to become one of the exceedingly rare neon-oxygen white
dwarfs. The only way we will really know is to wait a few million years.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 126 feet!
Separation: AB = 116 miles.
Distance (LY): 427
Total luminosity (Suns): 60,000
Deep Sky Objects
Easy
Collinder 69
Other Names: The Lambda Ori Cluster
Rating: 4 E
Position: 0535+0956
Type: Oc
Dimensions: 65'
Class: II 3pn
Cluster population: 20
Magnitude: 2.8
Notes:
It is 30 light years in diameter and 11 million years old.
Observations:
C8 at 83x. This cluster forms an acute triangle that points N, and is dominated by
3.5m bW Lambda Ori at the NE end.
- 36 -
Zone 159
Model (where the Sun is a baseball):
Its diameter would be 9,660 miles. Its stars would be 1,780 miles apart.
Distance (LY): 1,600
Luminosity (suns): 15,800
Difficult
NGC 2022
Other Names: PK 196-10.1; H IV 34
Astronomical League Program: Herschel 400 Club
Rating: 3 D
Position: 0542+0905
Type: Pn
Dimensions: 28"
Class: 4
Magnitude: 12.3
Observations:
C8 at 206x. It looks like a fuzzy star, with a hint of a ring at high powers. It has a
strong green color. You'll need to use high powers, because at anything less than 104x, it
looks like one of the field stars. A pair of 8m and 9m stars lies 10 min WNW. The
central star is 14.7m.
Model (where the Sun is a baseball):
Its diameter would be 132 miles.
Distance (LY): 6,900
Luminosity (suns): 45
- 37 -
Zone 159
Zone 159 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
STF 664
0515+0825
2E
2
Lambda Ori
0535+0956
2E
4
South 502
0555+1351
2E
3
OS 100
0510+0810
3E
2
A. G. 91
0510+0605
3E
2
South 468
0510+1359
3E
1
OS 106
0522+0524
3E
2
STF 815
0555+0521
3E
4
Argelander 63
0557+1013
3E
3
Barton 1187
0559+1306
3E
3
STF 626 rej
0500+1023
4E
1
South 463
0502+1122
4E
1
Weisse 5
0503+1321
4E
1
Kustner 21
0510+1100
4E
1
OSS 62
0512+0650
4E
2
STF 724
0530+1101
4E
3
A. G. 315
0538+1251
4E
3
STF 763
0539+1015
4E
3
A. G. 317
0547+1103
4E
3
Bur 561
0548+1225
4E
3
Component
A
B
A
B
C
D
E
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
C
D
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
- 38 -
Mag
7.25
7.97
3.39
5.59
10.72
11.20
9.63
7.90
8.29
7.02
10.33
8.56
10.20
8.62
8.86
7.19
10.44
8.26
10.28
8.80
8.68
9.10
10.38
10.40
8.00
10.40
10.60
13.50
7.17
10.08
9.95
10.17
9.95
10.80
7.46
7.60
9.20
10.50
9.57
10.26
8.25
8.93
7.60
10.84
6.68
12.97
11.28
Separation
—
4.6 —
4.3 +
28.0 +
74.5 151.1 +
—
45.3 —
3.7 —
11.7 —
26.5 +
—
9.5 +
—
13.1 +
87.0 —
32.8 —
5.7 +
—
24.6 +
90.1 +
115.0 +
—
32.5 +
—
5.0 +
—
5.0 —
124.6 +
—
6.9 =
—
30.2 —
6.2 +
—
25.4 +
—
18.9 77.1
PA
—
188 +
—
44 +
28.0 +
74.5 279 =
—
131 +
—
259 +
—
216 =
—
166 =
—
40 —
137 =
87.0 —
67 +
—
177 +
—
241 =
90.1 +
115.0 +
—
29 —
83 +
—
210 —
51 +
—
251 +
—
160 +
—
318 —
237 +
—
377.1
Zone 159
Designation
Position
Rating
Map
A. G. 318
0548+1215
4E
3
h712
0550+0605
4E
4
A. G. 319
0552+1026
4E
3
STF 817
0555+0702
4E
4
South 503
0556+1356
4E
3
STF 820
0556+0859
4E
4
A. G. 320
0557+1033
4E
3
13 Ori
0508+0928
5E
2
Jonckheere
323
0510+1053
5E
1
STF 744
0535+0716
5E
4
OS 518
0538+0715
5E
4
OS 113
0540+1301
5E
3
Fox 142
Jonckheere
1090
0542+1336
5E
3
0552+1253
5E
3
Kuiper 21
0555+1146
5E
3
OS 111
0535+1014
M
3
A 118
0544+1319
3M
3
STF 643
0508+0824
4M
2
Hipparcos 738
0534+0525
4M
4
Alpha Ori
0555+0724
4M
4
Hough 20
0555+1413
4M
3
STF 816
0555+0551
4M
4
h691
0505+0914
5M
2
Component
A
B
C
A
B
A
B
C
A
B
A
B
C
D
A
B
A
B
A
B
A
B
C
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
- 39 -
Mag
8.63
12.00
9.96
8.19
9.80
9.55
10.17
11.91
8.68
8.93
6.67
8.41
10.63
8.16
8.90
9.79
9.86
9.48
6.15
9.84
7.64
9.80
11.01
9.20
11.36
9.09
12.80
12.45
7.09
10.43
8.75
11.41
8.77
12.10
6.59
10.88
5.60
9.61
9.56
9.74
9.58
9.61
8.26
11.46
0.45
11.00
6.63
11.80
10.91
6.80
9.18
9.35
13.65
Separation
—
31.3 +
39.8 —
9.2 +
—
35.4 35.4 +
—
18.6 +
—
69.6 +!!
43.6 +!
290.6 +!!
—
5.0 +
—
22.5 +
—
124
—
3.6 +
84.6
—
13.2 +
—
2.1 +
39.7 —
10.2 +
—
6.0 —
74.9 +
—
22.7
—
2.8 —
2.6 +
—
2.4 —
7.9 +
—
174.4 +!
—
7.8 =
50.1 —
4.4 +
—
32.3
PA
—
114 +
39.8 —
83 +
—
356 +
35.4 +
—
73 +
—
321 +?
43.6 +!
290.6 +!!
—
111 +
—
13 +?
—
264
—
164 +
84.6
—
268 +
—
240 39.7 —
28 —
100 +
—
5—
196
—
352 —
0+
—
304 +
—
3—
153 +
—
274 50.1 —
288 —
156
Zone 159
Designation
Position
Rating
Map
16 Ori
0509+0949
5M
2
133 Tau
0548+1354
5M
3
134 Tau
Jonckheere
656
0550+1238
5M
3
0553+1424
5M
3
32 Ori
0531+0557
1D
4
52 Ori
0548+0627
1D
4
STF 726
0531+1015
3D
3
OS 123
0554+1015
3D
3
14 Ori
0508+0829
5D
2
Gamma Ori
Jonckheere
251
0525+0620
5D
2
0547+0931
5D
4
Component
A
B
C
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
Mag
5.43
12.70
10.50
5.29
12.17
12.01
4.88
10.30
10.09
10.90
4.19
5.58
6.01
6.10
7.47
8.12
7.04
8.90
5.79
6.68
1.64
13.93
5.78
10.97
Separation
—
89
168
—
17.8 24.6 —
118.9
—
4.2 +
—
1.2 +
—
1.2 —
1.1 —
2.1 +
—
0.7 —
179.9 +
—
16.2 -
PA
—
122
168
—
301 +
24.6 —
129
—
107 +
—
47 +!!
—
217 +
—
263 +
—
186 +
—
322 +
—
144 =
—
285 +
Deep Space
Object
Dolidze 17
Dolidze 21
Collinder 69
DolidzeDzimselejsvili 2
NGC 2022
PK 190-17.1
Position
0522+0707
0527+0704
0535+0956
Rating
4E
4E
4E
Map
2
2
4
0524+1128
0542+0905
0506+1042
5E
3D
4D
1
4
1
Type
Oc (IV 2 p)
Oc (IV 2 p)
Oc (II 3pn)
Oc
Pn (4)
Pn (2(4))
- 40 -
Specifications
Surface
Mag
Br
10.0
8.0
2.8
10.0
12.3
12.9
Population
20
12