Harshaw R. The Complete CD Guide to the Universe. Practical Astronomy (The Complete CD Atlas of the Universe)
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Appendix 75
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Appendix 77
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Appendix 79
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Appendix 81
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Zone 37
Zone 37, Map 1
Double Stars
Easy
STF 335 Rating: 3 E
Other name(s): HD 18800; SAO 12589
Position: 0305+6345
Magnitude Separation PA Year Spectra Colors
A 8.61 — — — F5 V W
B 9.46 21.9 - 161 + 1991 O
Notes:
1831: 24.4 @ 159. Sixteen measurements. Hipparcos/Tycho data show different dis-
tances for these stars; they may be optical. The stars show a similar, but small,
proper motion.
Observations:
C-8 at 104x. It is the obtuse angle of an 8.5-m triangle.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 12.4 miles.
Distance (LY): 362 Total luminosity (Suns): 6
STF 349 Rating: 2 E
Other name(s): ADS 2371; HD 19440; SAO 12635
Position: 0311+6347
Magnitude Separation PA Year Spectra Colors
A 7.43 — — — F8 V W
B 8.14 6.1 = 317 - 1994 Y
Notes:
1832: 6.1 @ 320. Fourty-two measurements. The stars show a similar, but large, proper
motion.
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Appendix 83
Zone 37
Observations:
C-8 at 104x. There is a delightful and very rich field about 50' S of this star. It
looks like a good Messier open cluster!
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.1 inches.
Separation: AB = 2.48 miles.
Distance (LY): 260 Total luminosity (Suns): 7.7
STF 362 Rating: 2 E
Other name(s): ADS 2426; HD 20053; SAO 23908
Position: 0316+6002
Magnitude Separation PA Year Spectra Colors
A 8.30 — — — A0 V W
B 8.80 7.3 + 137 - 1994 W
C 10.50 26.7 + 46 + 1987 ?
D 11.10 29.9 - 287 + 1987 No
E 9.90 35.3 = 243 + 1987 No
F 11.00 106.6 258 1987 No
G 13.72 110.6 281 1987 No
Notes:
AB 1831: 7.1 @ 143. Fourty-five measurements. The stars have a small difference in
proper motion.
AC 1893: 26.0 @ 42. Four measurements.
AD 1915: 30.9 @ 286. Two measurements.
AE 1866: 35.3 @ 242. Seven measurements.
AF and AG, One measurement.
Observations:
C-8 at 83x. Beautiful! The field is Stock 23. Bright and rich.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.76 inches.
Separation: AB = 2.06 miles; AC = 7.54 miles; AD = 8.45 miles; AE = 9.98
miles; AF = 30.1 miles; AG = 31.2 miles.
Distance (LY): 181 Total luminosity (Suns): 1.7
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84 The Complete CD Guide to the Universe
Zone 37
STF 373 rej Rating: 2 E
Other name(s): OS 33 rej (C); HD 20588; SAO 12721
Position: 0322+6244
Magnitude Separation PA Year Spectra Colors
A 7.63 — — — F8 IV W
B 10.40 20.1 + 118 + 1991 G B
C 7.78 116.2 - 111 + 1991 A0 bW
D 179.8 166 1984 No
Notes:
AB 1875: 19.8 @ 117. Eleven measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. However, the stars exhibit common proper
motion.
AC 1875: 117.7 @ 110. Fifteen measurements.
AD 1 measurement.
Observations:
C-8 at 83x. Nice! There is a 9.0-m star 4' S (SAO 12722) that makes for a nice,
bright triangle pointing S. An 11-m star is 20" away in pa 110; and an 8.8-m star is 115" in
pa 175.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.3 inches; B = 13.2 inches.
Separation: AB = 16.3 miles; AC = 94.3 miles; AD = 146 miles.
Distance (LY): 520 Total luminosity (Suns): 41
Moderate
Stein 422 Rating: 5 M
Position: 0303+6412
Magnitude Separation PA Year Spectra Colors
A 10.14 — — — W
B 10.71 9.8 - 126 - 1906 W
Notes:
1904: 10.1 @ 127. Four measurements.
Observations:
C-11 at 115x.