Zone 169, Master Map
+16°00'
Normal View
Zone Master, Normal View, 10 deg FOV
τ2
τ6
γ
β
τ1
+14°00'
φ
υ
e
c
+12°00'
χ
+10°00'
δ
f
d
λ
+08°00'
Serpens Cauda
Bootes
+06°00'
Virgo
Unukalhaiα
ε
16h 00m
15h 52m
15h 44m
15h 36m
15h 28m
15h 20m
15h 12m
15h 04m
Zone 169, Map 1
Normal Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 1945
Heintz 165
STF 1923
+14°00'
Doolittle 58
h5492
+13°00'
h252
NGC 5926
+12°00'
NGC 5837
STF 1911
STF 1907
+11°00'
A. G. 347
STF 1931
15h 30m
15h 25m
15h 20m
15h 15m
15h 10m
15h 05m
15h 00m
Zone 169, Map 1
Mirror Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 1945
Heintz 165
STF 1923
h252
NGC 5936
+13°00'
+14°00'
Doolittle 58
h5492
NGC 5926
+12°00'
NGC 5837
STF 1911
STF 1907
+11°00'
A. G. 347
STF 1931
15h 00m
15h 05m
15h 10m
15h 15m
15h 20m
15h 25m
15h 30m
Zone 169, Map 2
Normal Image
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+09°00'
STF 1910
+08°00'
IC 1116
Bootes
Hipparcos 2170
NGC 5919
h1267
+07°00'
Virgo
+06°00'
h1270
STF 1944
h1268
h2760
STF 1904
STF 1943
STF 1912
NGC 5921 NGC 5921
15h 30m
15h 25m
15h 20m
15h 15m
15h 10m
15h 05m
15h 00m
Zone 169, Map 2
Mirror Image
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+09°00'
STF 1910
Bootes
Hipparcos 2170
+08°00'
IC 1116
NGC 5919
+07°00'
Virgo
h1270
STF 1944
+06°00'
h1267
h1268
h2760
STF 1904
STF 1943
STF 1912
NGC 5921 NGC 5921
15h 00m
15h 05m
15h 10m
15h 15m
15h 20m
15h 25m
15h 30m
Zone 169, Map 3
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Roe 75
+15°00'
NGC 5954
NGC 5953
NGC 5951
STF 1978
NGC 6012
φ
+14°00'
39 Ser
Hough 549
STF 1949
NGC 5936
+13°00'
NGC 5984
υ
χ
NGC 5970
NGC 5970
OS 300
IC 1149
NGC 6007
+12°00'
STF 1988
NGC 5957
NGC 5956
+11°00'
A 1639
Delta Serδ
NGC 5988
STF 1986
16h 00m
15h 55m
15h 50m
15h 45m
15h 40m
15h 35m
STF 1952
15h 30m
Zone 169, Map 3
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+15°00'
Roe 75
NGC 5954
NGC 5953
NGC 5951
STF 1978
NGC 6012
φ
+14°00'
NGC 5984
υ
Hough 549
+13°00'
39 Ser
STF 1949
χ
NGC 5970
NGC 5957
NGC 5970
OS 300
+12°00'
STF 1988
IC 1149
NGC 6007
+11°00'
NGC 5956
δ
Delta Ser
NGC 5988
STF 1986
15h 30m
STF 1952
15h 35m
15h 40m
15h 45m
15h 50m
15h 55m
16h 00m
Zone 169, Map 4
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+10°00'
NGC 5988
STF 1986
STF 1952
+09°00'
STF 1960
OSS 140
+08°00'
NGC 5983
h2785
NGC 5940
+07°00'
λ
α
Unukalhai
+06°00'
Alpha Ser
NGC 5964
NGC 5964
NGC 6017
NGC 6014
STF 1953
16h 00m
15h 55m
15h 50m
15h 45m
15h 40m
15h 35m
15h 30m
Zone 169, Map 4
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 1986
+10°00'
NGC 5988
STF 1952
+09°00'
STF 1960
OSS 140
+08°00'
NGC 5983
h2785
+07°00'
λ
NGC 5964
Unukalhai
NGC 6017
NGC 6014
NGC 5964
+06°00'
Alpha Serα
STF 1953
15h 30m
15h 35m
15h 40m
15h 45m
15h 50m
15h 55m
16h 00m
Zone 169
34 Double Stars, 3 Galaxies
Flamsteed
39 Ser ........................................................ 15
NGC 5964 ................................................. 21
NGC 5970 ................................................. 17
A
O
A. G. 347..................................................... 4
Alpha Ser .................................................. 20
OS 300 ...................................................... 15
OSS 140 .................................................... 18
D
S
Delta Ser.................................................... 17
Doolittle 58 ................................................. 6
STF 1904..................................................... 7
STF 1907..................................................... 6
STF 1910..................................................... 9
STF 1911..................................................... 5
STF 1912..................................................... 8
STF 1923..................................................... 3
STF 1931..................................................... 2
STF 1943................................................... 11
STF 1944................................................... 11
STF 1945..................................................... 3
STF 1949................................................... 13
STF 1952................................................... 18
STF 1953................................................... 19
STF 1960................................................... 19
STF 1978................................................... 14
STF 1986................................................... 14
STF 1988................................................... 16
H
h1267........................................................... 8
h1268......................................................... 10
h1270........................................................... 9
h252............................................................. 4
h2760........................................................... 8
h2785......................................................... 20
h5492........................................................... 6
Heintz 165................................................... 5
Hipparcos 2170 ......................................... 10
Hough 549................................................. 13
N
NGC 5921 ................................................. 12
-1-
Zone 169
Zone 169, Map 1
Double Stars
Easy
STF 1931
Rating: 2 E
ADS 9580; HD 136160; SAO 101480
Position: 1519+1026
A
B
C
Magnitude
7.11
8.04
11.90
Separation
—
13.3 +
162.1
PA
—
167 93
Year
—
1996
1908
Spectra
F8 V
G5 V
Colors
Y
O
?
Notes:
AB 1832: 13.1 @ 173. 70 measurements. The stars share common proper motion.
AC 1 measurement.
Observations:
C8 at 65x. Webb saw them as yW and bW.
Scale model (in which the Sun is the size of a
baseball):
Diameter: A = 3.60 inches; B = 19.4 inches.
Separation: AB = 3.21 miles; AC = 29.3 miles.
Distance (LY): 155
Total luminosity (Suns): 3.9294
STF 1931
-2-
Zone 169
STF 1923
Rating: 3 E
ADS 9543; HD 135264; SAO 101451
Position: 1514+1427
A
B
Magnitude
8.62
9.72
Separation PA
—
—
4.7 11 -
Year
—
1993
Spectra
G0 V
Colors
W
O
Notes:
1829: 4.8 @ 13. 28 measurements.
Observations:
C8 at 104x. Webb saw them as Y and B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.45 inches.
Separation: AB = 3.74 miles.
Distance (LY): 510
Total luminosity (Suns): 13
STF 1945
Rating: 3 E
ADS 9653
Position: 1528+1442
A
B
C
D
E
Magnitude
9.96
10.37
10.39
15.20
11.60
Separation
—
36.8 +
45.6 +
23.1
246.5 +!!
PA
—
303 +
299 +
28
53 -
Year
—
1961
1961
1887
1961
Spectra
K2
Colors
O
W
W
No
W?
Notes:
AB 1830: 30.7 @ 273. 21 measurements.
AC 1867: 40.0 @ 282. 10 measurements.
AD 1 measurement.
AE 1908: 146.2 @ 54. 2 measurements. Is the 1961 separation overstated by 100
seconds?
Observations:
C11 at 115x. D was not detected.
-3-
Zone 169
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 29.9 inches.
Separation: AB = 3.96 miles; AC = 4.91 miles; AD = 2.48 miles; AE = 26.5
miles.
Distance (LY): 69
Total luminosity (Suns): 0.10
h252
Rating: 4 E
ADS B7254
Position: 1525+1359
A
B
C
Magnitude
9.83
10.51
12.18
Separation
—
11.6 49.9 +
PA
—
97 =
75 -
Year
—
1991
1988
Spectra
G9 V
Colors
W
O
?
Notes:
AB 1880: 11.7 @ 97. 9 measurements.
AC 1897: 44.4 @ 85. 4 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 2.85 inches.
Separation: AB = 4,963 feet; AC = 4.04 miles.
Distance (LY): 52
Total luminosity (Suns): 0.06
A. G. 347
Rating: 5 E
HD 136926; SAO 101516
Position: 1523+1122
A
B
Magnitude
9.57
10.35
Separation PA
—
—
24.2 7+
Year
—
1982
Spectra
G
Colors
W
O?
Notes:
1893: 24.6 @ 352 .7 measurements. The stars have a large difference in proper
motion.
-4-
Zone 169
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 21.2 inches.
Separation: AB = 2.26 miles.
Distance (LY): 60
Total luminosity (Suns): 0.060
Moderate
STF 1911
Rating: 3 M
ADS 9508; SAO 101384
Position: 1508+1158
A
B
Magnitude
9.41
9.82
Separation PA
—
—
2.0 =
293 -
Year
—
1991
Spectra
F8
Colors
W
W
Notes:
1830: 2.0 @ 294. 24 measurements.
Observations:
C11 at 339x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.2 inches.
Separation: AB = 2.62 miles.
Distance (LY): 840
Total luminosity (Suns): 16
Heintz 165
Position: 1509+1437
A
B
Magnitude
10.61
10.70
Rating: 5 M
Separation PA
—
—
3.7 +
15 -
Notes:
1980: 3.2 @ 17. 2 measurements.
-5-
Year
—
1999
Spectra
Colors
W
W
Zone 169
Observations:
C11 at 115x.
Doolittle 58
Position: 1517+1416
A
B
Magnitude
11.55
11.80
Rating: 5 M
Separation PA
—
—
34.9 +
239 -
Year
—
1988
Spectra
Colors
W
W
Notes:
1909: 34.0 @ 242. 2 measurements.
Observations:
C8 at 104x. An 8.3m star 2 min WSW is a glaring problem!
h5492
Position: 1518+1412
A
B
Magnitude
9.61
11.00
Rating: 5 M
Separation PA
—
—
10.6 265 +
Year
—
1918
Spectra
K5
Colors
Y
W
Notes:
1897: 12.5 @ 258. 5 measurements.
Observations:
C11 at 115x.
Difficult
STF 1907
Rating: 4 D
ADS 9498; HD 133708
Position: 1506+1138
A
B
Magnitude
8.35
8.42
Separation PA
—
—
0.9 353 -
-6-
Year
—
1999
Spectra
G0
Colors
W
Zone 169
Notes:
1830: 1.1 @ 12. 59 measurements.
Observations:
C11 at 560x. Difficult split. In a bleak field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.3 inches.
Separation: AB = 2,376 feet.
Distance (LY): 327
Total luminosity (Suns): 7.4
Zone 169, Map 2
Double Stars
Easy
STF 1904
Rating: 2 E
ADS 9493; HD 133408; SAO 120822
Position: 1504+0530
A
B
Magnitude
7.15
7.29
Separation PA
—
—
10.0 +
348 +
Year
—
1992
Spectra
F0 V
F0 V
Colors
W
W
Notes:
1829: 9.6 @ 346. 53 measurements. The stars show similar proper motions.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.70 inches; B = 9.96 inches.
Separation: AB = 4.00 miles.
Distance (LY): 256
Total luminosity (Suns): 13.6
-7-
Zone 169
h2760
Rating: 3 E
HD 132952; SAO 120799
Position: 1502+0538
A
B
Magnitude
9.94
10.86
Separation PA
—
—
18.2 21 =
Year
—
1991
Spectra
F8
Colors
W
B
Notes:
1895: 19.3 @ 21. 9 measurements.
This may be an optical pair as Hipparcos gives different distances (520 and 101 light
years).
Observations:
C11 at 115x.
h1267
Rating: 3 E
HD 133232
Position: 1503+0740
A
B
Magnitude
9.38
10.53
Separation PA
—
—
13.6 +
8-
Year
—
1991
Spectra
G5
Colors
Y
bW
Notes:
1895: 13.4 @ 9. 9 measurements.
This may be an optical pair as Hipparcos shows different distances (213 and 2,910
light years).
Observations:
C11 at 115x.
STF 1912
Rating: 3 E
ADS 9518; HD 134325; SAO 120864
Position: 1509+0512
A
B
Magnitude
9.01
9.73
Separation PA
—
—
7.0 +
153 -
Year
—
1991
Spectra
F2
Colors
W
W
Notes:
1829: 6.8 @ 158. 28 measurements. The stars show similar proper motions.
-8-
Zone 169
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.4 inches.
Separation: AB = 2.02 miles.
Distance (LY): 185
Total luminosity (Suns): 1
h1270
Rating: 5 E
ADS 9548; HD 135266; SAO 120906
Position: 1514+0651
A
B
Magnitude
9.33
10.96
Separation PA
—
—
15.3 +
166 +
Year
—
1991
Spectra
K5
Colors
yO
W
Notes:
1873: 13.8 @ 158. 9 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 37.1 inches.
Separation: AB = 2.38 miles.
Distance (LY): 100
Total luminosity (Suns): 0.13
Moderate
STF 1910
Rating: 3 M
ADS 9507; HD 134066; SAO 120851
Position: 1508+0914
A
B
Magnitude
6.72
6.95
Separation PA
—
—
4.0 =
212 +
-9-
Year
—
1997
Spectra
G5 V
G5 V
Colors
O
pB
Zone 169
Notes:
1823: 4.0 @ 206. Over 100 measurements. The stars show a similar, but large,
proper motion.
Observations:
C8 at 206x. Webb saw A as Y.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.00 inches; B = 18.1 inches.
Separation: AB = 3,432 feet.
Distance (LY): 105
Total luminosity (Suns): 1.8
h1268
Rating: 4 M
HD 133986; SAO 120841
Position: 1507+0547
A
B
Magnitude
8.27
12.13
Separation PA
—
—
29.0 +
94 +
Year
—
1916
Spectra
F5
Colors
bW
W
Notes:
1909: 28.6 @ 92. 3 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.3 inches.
Separation: AB = 15.1 miles.
Distance (LY): 333
Total luminosity (Suns): 4.12
Hipparcos 2170
Position: 1526+0752
A
B
Magnitude
10.43
12.42
Rating: 5 M
Separation PA
—
—
14.6
184
- 10 -
Year
—
1991
Spectra
F8
Colors
W
?
Zone 169
Notes:
1 measurement.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.1 inches.
Separation: AB = 23.7 miles.
Distance (LY): 1,040
Total luminosity (Suns): 6.6
STF 1943
Rating: 5 M
ADS 9648
Position: 1528+0522
A
B
Magnitude
10.00
10.50
Separation PA
—
—
5.2 147 -
Year
—
1986
Spectra
G5
Colors
yO
W
Notes:
1833: 5.3 @ 153. 34 measurements.
Observations:
C11 at 115x.
Difficult
STF 1944
Rating: 3 D
ADS 9647; HD 137761; SAO 121013
Position: 1528+0606
A
B
Magnitude
7.72
8.26
Separation PA
—
—
0.7 303 -
Notes:
1832: 1.3 @ 342. Over 100 measurements.
Observations:
C11 at 634x.
- 11 -
Year
—
1999
Spectra
F8
Colors
W
W
Zone 169
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.7 inches.
Separation: AB = 3,274 feet.
Distance (LY): 570
Total luminosity (Suns): 33
Deep Sky Objects
Difficult
NGC 5921
Other Names: UGC 9824; H I 148
Position: 1522+0504
Type: Gal
Surface brightness: 14.0
Rating: 5 D
Class: SB(r)bc
Dimensions: 4'
Magnitude: 12.0
PA: 130
Notes:
This galaxy produced supernova 2001X (type II).
Observations:
C8 at 65x. Very faint. A 12m star is 1.3 min SSW of the center.
Distance (LY): 65,000,000
Radial velocity (km/sec): +1,430
Total luminosity (Suns): 5,300,000,000
- 12 -
Zone 169
Zone 169, Map 3
Double Stars
Easy
STF 1949
Rating: 3 E
ADS B7296; SAO 101588
Position: 1531+1303
A
B
Magnitude
10.16
10.25
Separation PA
—
—
16.5 +
213 =
Year
—
1991
Spectra
G0
G0
Colors
W
W
Notes:
1828: 16.4 @ 213. 13 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 = 19.0 inches; B = 19.1 inches.
Separation: AB = 2.90 miles.
Distance (LY): 113
Total luminosity (Suns): 0.2
Hough 549
Rating: 4 E
ADS 9685; HD 138454; SAO 101595
Position: 1532+1405
A
B
Magnitude
7.92
10.58
Separation PA
—
—
132.4 +! 306 -?
Year
—
1991
Notes:
1895: 118.8 @ 134. 3 measurements. Quadrant reversal?
B has an 11.3m companion at 0.9 @ 241 (1991).
- 13 -
Spectra
G5
Colors
W
?
Zone 169
Observations:
C8 at 104x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 19.3 inches.
Separation: AB = 215 miles.
Distance (LY): 1,040
Total luminosity (Suns): 107
STF 1978
Rating: 4 E
SAO 101772
Position: 1551+1441
A
B
Magnitude
9.12
9.99
Separation PA
—
—
15.4 +
235 =
Year
—
1991
Spectra
G0
K0
Colors
Y
O?
Notes:
1831: 15.3 @ 235. 17 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 = 18.0 inches; B = 27.2 inches.
Separation: AB = 57.7 miles.
Distance (LY): 2,400
Total luminosity (Suns): 146
STF 1986
Rating: 4 E
ADS 9840; HD 142658; SAO 101817
Position: 1555+1006
A
B
Magnitude
8.85
9.72
Separation PA
—
—
14.8 +
93 -
Year
—
1991
Spectra
F0
F0
Colors
W
O
Notes:
1831: 14.4 @ 94. 22 measurements. The stars share a small common proper motion.
- 14 -
Zone 169
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.0 inches; B = 11.5 inches.
Separation: AB = 19.4 miles.
Distance (LY): 840
Total luminosity (Suns): 27
39 Ser
OS 583; HD 142267; SAO 101792
Position: 1553+1313
A
B
Magnitude
6.20
11.80
Rating: 5 E
Separation PA
—
—
96.8 110 -!
Year
—
1924
Spectra
G0 IV
Colors
yW
?
Notes:
1862: 106.4 @ 131. 5 measurements. The primary is a spectroscopic binary.
Observations:
C8 at 104x. Use averted vision to see B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.55 inches.
Separation: AB = 8.61 miles.
Distance (LY): 57
Total luminosity (Suns): 0.845
Moderate
OS 300
Rating: 2 M
ADS 9740; HD 139862; SAO 101673
Position: 1540+1203
A
B
Magnitude
6.22
10.01
Separation PA
—
—
15.5 +
262 =
Notes:
1843: 14.3 @ 262. 24 measurements.
- 15 -
Year
—
1998
Spectra
G8 II
F5 V
Colors
W
dB!
Zone 169
A is a spectroscopic binary.
The stars show similar proper motions.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size
of a baseball):
Diameter: A = 16 feet; B = 14.6 inches.
Separation: AB = 25.6 miles.
Distance (LY): 1,060
Total luminosity (Suns): 309
OS 300
STF 1988
Rating: 3 M
ADS 9850; HD 142910; SAO 101829
Position: 1557+1229
A
B
Magnitude
7.61
7.92
Separation PA
—
—
1.9 251 -
Year
—
1997
Spectra
F2 V
Colors
W
?
Notes:
1830: 2.9 @ 266. Over 100 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.10 inches.
Separation: AB = 4,118 feet.
Distance (LY): 264
Total luminosity (Suns): 12.6
- 16 -
Zone 169
Delta Ser
13 Ser; STF 1954; ADS 9701; SAO 101623
Position: 1535+1032
A
B
Magnitude
3.80
4.84
Separation PA
—
—
4.1 +
174 -
Rating: 4 M
Year
—
1999
Spectra
F0 IV
F0 V
Colors
W
G
Notes:
The orbit takes 3,168 years (Hopmann, 1973).
The primary is a Delta Scuti variable.
1819: 3.4 @ 202. Over 100 measurements.
Observations:
C8 at 206x. Some observers report colors of B and O. Webb thought they were yW
and W.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches; B = 8.11 inches.
Separation: AB = 1.34 miles.
Distance (LY): 210
Total luminosity (Suns): 135
Deep Sky Objects
Moderate
NGC 5970
Other Names: UGC 9943; H II 76
Astronomical League Program: Herschel II Club
Rating: 5 M
Position: 1539+1211
Type: Gal
Surface brightness: 13.1
Class: SB(r)c
Dimensions: 3' x 1'
- 17 -
Magnitude: 12.4
PA: 88
Zone 169
Observations:
C8 at 83x. Small, with an E-W axis. Three bright stars serve as landmarks in this
field. 5 min to the NE lies SAO 101663 (7.9m), a real pest for seeing the galaxy!
Distance (LY): 90,000,000
Radial velocity (km/sec): +2,115
Total luminosity (Suns): 7,000,000,000
Zone 169, Map 4
Double Stars
Easy
STF 1952
A 1122 (B); ADS 9686; HD 138455
Position: 1532+0940
A
B
C
Magnitude
8.63
10.10
9.80
Separation
—
0.4 16.4 +
Rating: 3 E
PA
—
346 -!
221 -
Year
—
1988
1991
Spectra
F8
Colors
W
No
O
Notes:
AB 1905: 0.5 @ 23. 17 measurements. This system may be optical as Hipparcos
shows different distances (209 and 73 light years).
AC 1829: 15.9 @ 222. 28 measurements.
Observations:
C11 at 115x. B was not detected at any magnification.
OSS 140
Rating: 3 E
HD 138528; SAO 121052
Position: 1532+0835
A
B
C
Magnitude
8.24
8.53
11.08
Separation
—
114.0 +
87.5 -
PA
—
179 356 +
- 18 -
Year
—
1994
1991
Spectra
F8
Colors
W
Y
No
Zone 169
Notes:
AB 1874: 111.9 @ 180. 7 measurements. The stars show similar proper motions;
however, Hipparcos shows different distances (950 and 165 light years).
AC 1906: 90.8 @ 355. 4 measurements.
Observations:
C8 at 104x. A 10m star is at a distance of 60" in pa 0. Very rich field.
STF 1960
Position: 1537+0915
A
B
Magnitude
9.96
10.52
Rating: 3 E
Separation PA
—
—
12.0 319 -
Year
—
1991
Spectra
G5
Colors
Y
W
Notes:
1830: 12.2 @ 320. 12 measurements.
Observations:
C11 at 115x.
STF 1953
Rating: 4 E
ADS 9691; HD 138596; SAO 121056
Position: 1533+0531
A
B
Magnitude
9.24
10.26
Separation PA
—
—
6.6 +
253 -
Year
—
1991
Spectra
F5
Colors
W
B
Notes:
1831: 6.5 @ 255. 18 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.1 inches.
Separation: AB = 67.2 miles.
Distance (LY): 6,520
Total luminosity (Suns): 930
- 19 -
Zone 169
Moderate
h2785
Position: 1535+0800
A
B
Magnitude
11.36
11.37
Rating: 4 M
Separation PA
—
—
18.9 284 -?
Year
—
1991
Spectra
Colors
W
W
Notes:
1897: 19.9 @ 113. 4 measurements. Quadrant reversal?
Observations:
C11 at 115x.
Difficult
Alpha Ser
Rating: 5 D
24 Ser; Unukalhai, "the neck of the snake"; h1277; ADS 9765; HD 140573; SAO
121157
Position: 1544+0625
A
B
C
Magnitude
2.63
11.80
13.00
Separation
—
57.9 136.1 +!
PA
—
349 268 -
Year
—
1911
1960
Spectra
K0 III
Colors
Y!!
?
No
Notes:
AB 1836: 61.5 @ 0. 8 measurements. This star is an infra-red source.
AC 1836: 112.7 @ 271. 2 measurements.
From James Kaler's Star Notes:
Unukalhai (oo-nook’-ul-high), closely following the original Arabic, means "the
serpent's neck," the star more rarely called "Cor Serpentis," "the serpent's heart."
With a temperature of about 4,300 degrees Kelvin, the star is a relatively warm orange
giant some 15 times the solar diameter across. No longer living off hydrogen fusion in its
deep core as does the Sun, the dying star is for a time most likely illuminated by the
fusion of helium into carbon and oxygen. If we add in the invisible infrared radiation
produced by the cool star, the luminosity climbs to 70 times solar.
Warm orange giants radiate X- rays, while cool orange giants do not, the high-energy
radiation coming from activity vaguely like that produced by the solar activity associated
- 20 -
Zone 169
with sunspots. In league with its kind, Unukalhai is a modest X-ray emitter. The star does
stand out, however, as an example of a "strong-lined giant," meaning that the dark gaps in
its spectrum, its rainbow of colors, are especially strong, the result of a modest
enhancement of metals and carbon in its cool atmosphere.
Observations:
C8 at 206x. Use averted vision and high powers to see the illusive B. A mask was no
help.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 6.59 miles; AC = 15.5 miles.
Distance (LY): 73
Total luminosity (Suns): 38
Deep Sky Objects
Difficult
NGC 5964
Other Names: UGC 9935, IC4551?
Rating: 5 D
Position: 1538+0559
Type: Gal
Surface brightness: 14.6
Class: SB(rs)d
Dimensions: 4.0' x 3.1'
Magnitude: 12.0
PA: 145
Observations:
C11 at 115x. Very faint patch with a stellar nucleus in a bare field.
Radial velocity (km/sec): +1,492
- 21 -
Zone 169
Zone 169 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
STF 1904
1504+0530
2E
2
STF 1931
1519+1026
2E
1
h2760
1502+0538
3E
2
h1267
1503+0740
3E
2
STF 1912
1509+0512
3E
2
STF 1923
1514+1427
3E
1
STF 1945
1528+1442
3E
1
STF 1949
1531+1303
3E
3
STF 1952
1532+0940
3E
4
OSS 140
1532+0835
3E
4
STF 1960
1537+0915
3E
4
h252
1525+1359
4E
1
Hough 549
1532+1405
4E
3
STF 1953
1533+0531
4E
4
STF 1978
1551+1441
4E
3
STF 1986
1555+1006
4E
3
h1270
1514+0651
5E
2
A. G. 347
1523+1122
5E
1
39 Ser
1553+1313
5E
3
OS 300
1540+1203
2M
3
STF 1910
1508+0914
3M
2
Component
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
C
D
E
A
B
A
B
C
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
- 22 -
Mag
7.15
7.29
7.11
8.04
11.90
9.94
10.86
9.38
10.53
9.01
9.73
8.62
9.72
9.96
10.37
10.39
15.20
11.60
10.16
10.25
8.63
10.10
9.80
8.24
8.53
11.08
9.96
10.52
9.83
10.51
12.18
7.92
10.58
9.24
10.26
9.12
9.99
8.85
9.72
9.33
10.96
9.57
10.35
6.20
11.80
6.22
10.01
6.72
6.95
Separation
—
10.0 +
—
13.3 +
162.1
—
18.2 —
13.6 +
—
7.0 +
—
4.7 —
36.8 +
45.6 +
23.1
246.5 +!!
—
16.5 +
—
0.4 16.4 +
—
114.0 +
87.5 —
12.0 —
11.6 49.9 +
—
132.4 +!
—
6.6 +
—
15.4 +
—
14.8 +
—
15.3 +
—
24.2 —
96.8 —
15.5 +
—
4.0 =
PA
—
348 +
—
167 162.1
—
21 =
—
8—
153 —
11 —
303 +
45.6 +
23.1
53 —
213 =
—
346 -!
16.4 +
—
179 87.5 —
319 —
97 =
49.9 +
—
306 -?
—
253 —
235 =
—
93 —
166 +
—
7+
—
110 -!
—
262 =
—
212 +
Zone 169
Designation
Position
Rating
Map
STF 1911
1508+1158
3M
1
STF 1988
1557+1229
3M
3
h1268
1507+0547
4M
2
h2785
1535+0800
4M
4
Delta Ser
1535+1032
4M
3
Heintz 165
1509+1437
5M
1
Doolittle 58
1517+1416
5M
1
h5492
Hipparcos
2170
1518+1412
5M
1
1526+0752
5M
2
STF 1943
1528+0522
5M
2
STF 1944
1528+0606
3D
2
STF 1907
1506+1138
4D
1
Alpha Ser
1544+0625
5D
4
Component
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
Mag
9.41
9.82
7.61
7.92
8.27
12.13
11.36
11.37
3.80
4.84
10.61
10.70
11.55
11.80
9.61
11.00
10.43
12.42
10.00
10.50
7.72
8.26
8.35
8.42
2.63
11.80
13.00
Separation
—
2.0 =
—
1.9 —
29.0 +
—
18.9 —
4.1 +
—
3.7 +
—
34.9 +
—
10.6 —
14.6
—
5.2 —
0.7 —
0.9 —
57.9 136.1 +!
PA
—
293 —
251 —
94 +
—
284 -?
—
174 —
15 —
239 —
265 +
—
184
—
147 —
303 —
353 —
349 136.1 +!
Deep Space
Object
NGC 5970
NGC 5921
NGC 5964
Position
1539+1211
1522+0504
1538+0559
Rating
5M
5D
5D
Map
3
2
4
Type
Gal (SB(r)c II-III)
Gal (SB(r)bc I-II)
Gal (SB(rs)d)
- 23 -
Specifications
Surface
Mag
Br
12.4
13.1
12.0
14.0
12.0
14.6
Population