Zone 75, Master Map
Normal View
β
+52°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Rastaban
Beta Dra
STF 2225
c
e
Espin
77
Draco
STF 2180
+51°00'
Hussey 672
+50°00'
Espin 2661
STF 2229
STF 2251
STF 2133
STF 2142
Fox 202
+49°00'
STF 2167 rej
STF 2153
Hussey 923
f
d
+48°00'
STF 2210
STF 2189 rej
STF 2164
Espin 1259
17h 48m
17h 42m
17h 36m
17h 30m
17h 24m
17h 18m
17h 12m
Zone 75, Map 1
Normal Image
Nu 1 and Nu 2 Dra
Espin 637
STF 2138
µ Alrakis
Mu Dra
+54°00'
ν1
ν2
+55°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 2146
Espin 776
+53°00'
Bur 1249
OSS 151
+52°00'
Rastaban
Beta Dra
Espin 2654
Hussey 672
STF 2180
Espin 77
+51°00'
β
Hercules
Draco
+50°00'
Espin 2661
Fox 202
17h 36m
17h 30m
STF 2167 rej
17h 24m
17h 18m
STF 2133
STF 2142
17h 12m
17h 06m
17h 00m
16h 54m
Zone 75, Map 1
Mirror Image
ν1
ν2
STF 2108 rej
Espin 637
STF 2138
+54°00'
µ Alrakis
Mu Dra
Nu 1 and Nu 2 Dra
+55°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 2146
Bur 1249
+53°00'
Espin 776
OSS 151
Espin 2654
+52°00'
Rastabanβ
Beta Dra
+51°00'
Hussey 672
Espin 971
STF 2180
Espin 77
+50°00'
Hercules
Draco
STF 2133
STF 2142
16h 54m
17h 00m
17h 06m
17h 12m
Fox 202
17h 18m
STF 2167 rej
17h 30m
17h 24m
17h 36m
Zone 75, Map 2
Normal Image
+50°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Fox 202
STF 2167 rej
Hussey 923
+49°00'
STF 2133
STF 2142
STF 2153
+48°00'
Espin 1090
STF 2189 rej
+47°00'
SI 32
STF 2164
OS 323
STF 2177
Stone 35
+46°00'
Kazeza 122
Espin 1255
Couteau 1773
Kuiper 79
Espin 2655
Espin 1257
17h 36m
17h 30m
17h 24m
17h 18m
17h 12m
17h 06m
17h 00m
16h 54m
+45°00'
STF 2152
Zone 75, Map 2
Mirror Image
+50°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 2133
STF 2142
Fox 202
Espin 1090
STF 2189 rej
+48°00'
Hussey 923
STF 2153
+49°00'
STF 2167 rej
+47°00'
SI 32
STF 2164
OS 323
Kazeza 122
+46°00'
STF 2177
Espin 1255
Stone 35
Couteau 1773
STF 2152
+45°00'
Kuiper 79
Espin 2655
OS 317
16h 54m
17h 00m
17h 06m
17h 12m
17h 18m
17h 24m
17h 30m
17h 36m
Zone 75, Map 3
Normal Image
ν1
ν2
+55°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Nu 1 and Nu 2 Dra
Bur 1249
+54°00'
Espin 637
A. G. 217
+53°00'
P Muller 605
A 1886
STF 2271
STF 2261
Beta Dra
Rastaban
+52°00'
β
STF 2225
Hussey 672
Eltanin
+51°00'
Gamma Draγ
Espin 78
STF 2279
STF 2180
Espin 2661
+50°00'
Hussey 674
STF 2229
STF 2290
Fox 202
STF 2251
18h 06m
18h 00m
17h 54m
17h 48m
17h 42m
17h 36m
17h 30m
17h 24m
Zone 75, Map 3
Mirror Image
ν1
ν2
+55°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Nu 1 and Nu 2 Dra
+54°00'
Espin 637
P Muller 605
+53°00'
Espin 776 Bur 1249
A 1886
Beta Dra
Rastabanβ
+52°00'
STF 2271
STF 2261
STF 2225
γ
Eltanin
Gamma Dra
Espin 78
STF 2180
+51°00'
Hussey 672
STF 2279
+50°00'
Espin 2661
STF 2229
Fox 202
STF 2251
STF 2167 rej
17h 24m
17h 30m
17h 36m
17h 42m
17h 48m
17h 54m
18h 00m
18h 06m
Zone 75, Map 4
Normal Image
+50°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 2229
Fox 202
STF 2251
+49°00'
STF 2290
Hussey 923
STF 2210
+48°00'
STF 2258
+47°00'
STF 2189 rej
Espin 1259
Espin 1157
STF 2177
Stone 35
Barnard 43
ι
Hussey 235
Bur 1459
Espin 640
Smart 79
Espin 1257
STF 2242
18h 06m
18h 00m
17h 54m
17h 48m
+45°00'
STF 3129
17h 42m
17h 36m
+46°00'
STF 2277
17h 30m
17h 24m
Zone 75, Map 4
Mirror Image
+50°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 2229
Fox 202
STF 2251
+49°00'
STF 2167 rej
Hussey 923
STF 2210
STF 2258
+48°00'
STF 2277
STF 2189 rej
+47°00'
STF 2164
Espin 1259
STF 2177
Barnard 43
ι
+46°00'
Stone 35
Bur 1459
Hussey 235
Espin 1257
17h 24m
17h 30m
17h 36m
17h 42m
+45°00'
STF 3129
Espin 640
Smart 79
STF 2242
17h 48m
17h 54m
18h 00m
18h 06m
Zone 75
Index
43 Double Stars
B
K
Barnard 43 ............................................... 23
Beta Dra ..................................................... 4
Bur 1249 .................................................... 3
Kuiper 79 ................................................. 14
M
Mu Dra ....................................................... 5
C
O
Couteau 1773 .......................................... 14
OS 323 ....................................................... 9
OSS 151 ..................................................... 2
E
Espin 1090 ................................................. 9
Espin 1255 ............................................... 12
Espin 1257 ............................................... 21
Espin 1259 ............................................... 22
Espin 2661 ............................................... 17
Espin 637 ................................................. 16
Espin 77 ..................................................... 6
Espin 776 ................................................... 3
Espin 78 ................................................... 18
P
P Muller 605............................................ 18
S
Smart 79 ................................................... 21
STF 2133 ................................................. 11
STF 2138 ................................................... 2
STF 2142 ................................................. 11
STF 2146 ................................................... 7
STF 2152 ................................................. 13
STF 2153 ................................................. 13
STF 2164 ................................................... 8
STF 2167 rej............................................ 10
STF 2177 ................................................. 10
STF 2180 ................................................... 6
STF 2189 rej............................................ 20
STF 2210 ................................................. 24
STF 2225 ................................................. 17
STF 2229 ................................................. 15
STF 2251 ................................................. 22
STF 2258 ................................................. 24
STF 2261 ................................................. 16
Stone 35 ................................................... 12
F
Fox 202 .................................................... 26
G
Gamma Dra ............................................. 19
H
Hussey 235 .............................................. 25
Hussey 672 ................................................ 7
Hussey 923 .............................................. 25
I
Iota Her .................................................... 23
-1-
Zone 75
Zone 75, Map 1
Double Stars
Easy
OSS 151
HD 154650; SAO 30225
Rating: 4 E
Position: 1704+5314
A
B
Magnitude
7.82
9.34
Separation PA
—
—
84.7 +
172 -
Year
—
1993
Spectra
K0
Colors
Y
pO
Notes:
1875: 78.2 @ 173. 17 measurements.
Hipparcos/Tycho data show different distances for these stars (1,030 and 740 light
years); they may be optical. The stars have different proper motions.
Observations:
C8 at 104x. This pair is the W vertex of a flat triangle of 9m and 10m stars.
STF 2138
ADS 10386; HD 155674; SAO 30274
Rating: 4 E
Position: 1710+5430
A
B
Magnitude
8.85
9.34
Separation PA
—
—
22.3 =
134 -
Year
—
1991
Spectra
K0
K8
Colors
O
W
Notes:
1830: 22.3 @ 139. 29 measurements. The stars share common proper motion.
Observations:
C8 at 104x.
-2-
Zone 75
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 25.6 inches; B = 37.9 inches.
Separation: AB = 2.40 miles.
Distance (LY): 69
Total luminosity (Suns): 0.17
Bur 1249
ADS 10513; HD 234431; SAO 30357
Rating: 4 E
Position: 1722+5351
A
B
C
Magnitude
9.26
10.20
9.76
Separation
—
0.4 =
62.2 -
PA
—
271 +?
77 +
Year
—
1982
1991
Spectra
G0
Colors
W
No
O
Notes:
AB 1891: 0.4 @ 80. 17 measurements. Quadrant reversal?
AC 1891: 62.5 @ 74. 9 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.2 inches.
Separation: AB = 950 feet; AC = 29.3 miles.
Distance (LY): 302
Total luminosity (Suns): 3
Espin 776
ADS 10471; HD 234422; SAO 30334
Rating: 5 E
Position: 1718+5346
A
B
C
BC
Magnitude
9.30
10.98
11.40
Separation PA
—
—
28.8 154 +
2.6 +
311 -
-3-
Year
—
1921
1993
Spectra
K0
Colors
W
?
No
Zone 75
Notes:
AB 1909: 29.4 @ 151. 2 measurements.
BC 1909: 1.9 @ 315. 5 measurements.
Heintz 1995 confirms that the Furner measures listed in ADS belong to this system.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 26.2 inches.
Separation: AB = 69.7 miles; BC = 6.29 miles.
Distance (LY): 1,550
Total luminosity (Suns): 54
Beta Dra
Rating: 5 E
23 Dra; Rastaban; Bur 1090; ADS 10611; HD 159181; SAO 30429
Position: 1730+5218
A
B
Magnitude
2.79
12.70
Separation PA
—
—
117.4 +
156 -
Year
—
1960
Spectra
G2 II
Notes:
1912: 115.6 @ 157. 2 measurements.
The primary is an infra-red source.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 138 inches.
Separation: AB = 66.3 miles.
Distance (LY): 362
Total luminosity (Suns): 660.08
-4-
Colors
yW
?
Zone 75
Moderate
Mu Dra
Rating: 1 M
21 Dra; Arrakis, "the dancer"; STF 2130; ADS 10345; HD 154906; SAO 30239
Astronomical League Program: Double Star Club
Position: 1705+5428
A
B
Magnitude
4.91
5.78
Separation PA
—
—
2.2 20 -!!
Year
—
1999
Spectra
F5 V
F6 V
Colors
W
W
Notes:
1779 (William Herschel): 3.2 @ 205.
1819: 4.2 @ 210. Over 100 measurements.
The orbit takes 672 years to complete, with semi-major axis of 3.94" and retrograde
motion.
The masses are each 1.3 Suns.
Observations:
C8 at 206x. Some observers
report Y and B.
Scale model (in which the Sun
is the size of a baseball):
Diameter: A = 4.35 inches; B =
11.5 inches.
Separation: AB = 1,584 feet.
Distance (LY): 88
Total luminosity (Suns): 6.38
Mu Dra
Double Star (5.7, 5.7), 2.2” @ 20
C8 at 570x; 7/6/95
-5-
Zone 75
STF 2180
ADS 10597; HD 158868; SAO 30413
Rating: 3 M
Position: 1729+5052
A
B
Magnitude
7.08
7.41
Separation PA
—
—
2.9 260 -
Year
—
1998
Spectra
F0 IV
Colors
W
Y
Notes:
1831: 3.2 @ 265. Over 100 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 1.82 miles.
Distance (LY): 403
Total luminosity (Suns): 29
Espin 77
CHR 60 (a)ADS 10369; HD 155328; SAO 30262
Rating: 5 M
Position: 1708+5051
A
B
Magnitude
6.46
10.89
Separation PA
—
—
18.3 +
274 =
Year
—
1959
Notes:
1901: 17.0 @ 274. 12 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.70 inches.
Separation: AB = 19.7 miles.
Distance (LY): 690
Total luminosity (Suns): 100
-6-
Spectra
A1 V
Colors
W
?
Zone 75
STF 2146
ADS 10410; HD 156162; SAO 30299
Rating: 5 M
Position: 1713+5408
A
B
C
Magnitude
6.90
9.20
8.87
Separation
—
2.7 =
89.2 +
PA
—
223 233 +?
Year
—
1996
1999
Spectra
F0 III
G5
Colors
W
W
W
Notes:
AB 1831: 2.7 @ 226. 16 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. However, the stars exhibit common proper
motion.
AC 1901: 88.8 @ 50. 13 measurements. Quadrant reversal?
Observations:
C8 at 280x. AB were were notched.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 23.7 inches; B = 20.4 inches.
Separation: AB = 1.42 miles; AC = 47.0 miles.
Distance (LY): 338
Total luminosity (Suns): 21
Hussey 672
ADS 10552; HD 158260; SAO 30381
Rating: 5 M
Position: 1726+5130
A
B
Magnitude
8.93
10.87
Separation PA
—
—
4.3 58 -
Notes:
1902: 5.0 @ 67. 12 measurements.
Observations:
C11 at 115x.
-7-
Year
—
1993
Spectra
A3
Colors
W
W?
Zone 75
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.81 inches.
Separation: AB = 7.44 miles.
Distance (LY): 1,110
Total luminosity (Suns): 30
Zone 75, Map 2
Double Stars
Easy
STF 2164
ADS 10530; HD 157906; SAO 46691
Rating: 2 E
Position: 1724+4716
A
B
Magnitude
7.92
9.64
Separation PA
—
—
9.2 +
13 -
Year
—
1991
Notes:
1829: 8.8 @ 17. 19 measurements.
Observations:
C8 at 83x. It forms the N vertex of an 8m quadrangle.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.9 inches.
Separation: AB = 3.74 miles.
Distance (LY): 261
Total luminosity (Suns): 4.5
-8-
Spectra
F8
Colors
Y!
B!
Zone 75
Espin 1090
ADS 10309
Rating: 3 E
Position: 1701+4817
A
B
Magnitude
10.60
10.60
Separation PA
—
—
5.0 277 =
Year
—
1981
Spectra
Colors
Y
Y
Notes:
1911: 5.1 @ 277. 2 measurements.
Observations:
C11 at 115x.
OS 323
ADS 10338; HD 154759; SAO 46479
Rating: 4 E
Position: 1705+4658
A
B
Magnitude
8.24
11.21
Separation PA
—
—
10.8 +
81 -
Year
—
1991
Notes:
1845: 5.5 @ 105. 28 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 51.3 inches.
Separation: AB = 9.26 miles.
Distance (LY): 550
Total luminosity (Suns): 11
-9-
Spectra
K3 III
Colors
Y
B
Zone 75
STF 2167 rej
ADS 10541; HD 158033; SAO 46697
Rating: 4 E
Position: 1724+4931
A
B
Magnitude
8.09
10.21
Separation PA
—
—
20.3 +
210 -
Year
—
1991
Spectra
F5
Colors
W
O
Notes:
1900: 18.2 @ 223. 7 measurements.
Observations:
C8 at 104x. Averted vision helps see B. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.1 inches.
Separation: AB = 26.6 miles.
Distance (LY): 840
Total luminosity (Suns): 31
STF 2177
ADS 10574; HD 158570; SAO 46736
Rating: 4 E
Position: 1728+4625
A
B
Magnitude
9.28
10.68
Separation PA
—
—
3.6 +
135 +
Year
—
1987
Notes:
1831: 3.2 @ 134. 19 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.2 inches.
Separation: AB = 4.49 miles.
Distance (LY): 800
Total luminosity (Suns): 12.5
- 10 -
Spectra
F0
Colors
W
B?
Zone 75
Moderate
STF 2133
ADS 10372; SAO 46516
Rating: 4 M
Position: 1709+4945
A
B
Magnitude
9.32
10.57
Separation PA
—
—
3.4 +
199 -
Year
—
1991
Spectra
G0
Colors
Y
pO?
Notes:
1830: 3.2 @ 200. 15 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.2 inches.
Separation: AB = 2.97 miles.
Distance (LY): 560
Total luminosity (Suns): 6.06
STF 2142
ADS 10397; HD 155860; SAO 46561
Rating: 4 M
Position: 1712+4945
A
B
Magnitude
6.12
9.68
Separation PA
—
—
4.9 110 -
Year
—
1996
Notes:
1830: 5.3 @ 116. 22 measurements.
Kuiper found a 14.5m star at 28.8 @ 105 in 1958.
Observations:
C8 at 83x.
- 11 -
Spectra
A5 III
Colors
B
R
Zone 75
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.80 inches.
Separation: AB = 2.41 miles.
Distance (LY): 316
Total luminosity (Suns): 30
Espin 1255
ADS 10311; HD 154082; SAO 46438
Rating: 5 M
Position: 1701+4616
A
B
Magnitude
8.02
11.70
Separation PA
—
—
8.4
45
Year
—
1913
Spectra
K5
Colors
O
W?
Notes:
1 measurement.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 34.4 inches.
Separation: AB = 15.6 miles.
Distance (LY): 1,190
Total luminosity (Suns): 102
Stone 35
ADS 10577
Rating: 5 M
Position: 1728+4616
A
B
Magnitude
11.43
11.90
Separation PA
—
—
7.5 183 =
Notes:
1879: 7.6 @ 183. 6 measurements.
- 12 -
Year
—
1924
Spectra
G
Colors
yW
W
Zone 75
Observations:
C11 at 115x. This pair lies 10 min S of STF 2177.
Difficult
STF 2152
ADS 10458; SAO 46618
Rating: 2 D
Position: 1718+4535
A
B
Magnitude
9.79
9.89
Separation PA
—
—
1.9 =
237 -
Year
—
1999
Spectra
F8
Colors
W
W
Notes:
1830: 1.9 @ 249. 26 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.6 inches.
Separation: AB = 3.58 miles.
Distance (LY): 1,210
Total luminosity (Suns): 32
STF 2153
ADS 10460; HD 156963; SAO 46619
Rating: 3 D
Position: 1718+4918
A
B
Magnitude
9.36
9.80
Separation PA
—
—
1.4 248 -
Notes:
1831: 1.9 @ 282. 72 measurements.
Observations:
C8 at 280x.
- 13 -
Year
—
1998
Spectra
K0
Colors
Y
W
Zone 75
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 26.3 inches.
Separation: AB = 1,320 feet.
Distance (LY): 119
Total luminosity (Suns): 0.4
Couteau 1773
Rating: 4 D
Position: 1707+4604
A
B
Magnitude
10.27
10.50
Separation PA
—
—
0.7 =
25 +
Year
—
1993
Spectra
Colors
W
W
Notes:
1978: 0.7 @ 24. 3 measurements.
Observations:
C11 at 634x.
Distance (LY): 108
Total luminosity (Suns): 0.127
Kuiper 79
HD 155876
Rating: 4 D
Position: 1712+4540
A
B
C
Magnitude
9.31
9.54
14.20
Separation
—
1.1 =
41.4 +
PA
—
231 +
320 +
Year
—
1998
1937
Spectra
K5
Colors
O
Y
No
Notes:
AB 1934: 1.1 @ 229. Over 100 measurements. Period is 12.95 years, semi-major
axis of 0.762", motion retrograde.
AC 1934: 36.8 @ 316. 4 measurements.
Observations:
C11 at 634x.
- 14 -
Zone 75
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 37.1 inches.
Separation: AB = 158 feet; AC = 1.35 miles.
Distance (LY): 21
Total luminosity (Suns): 0.012
Zone 75, Map 3
Double Stars
Easy
STF 2229
ADS 10790; HD 161956; SAO 30555
Rating: 3 E
Position: 1746+5011
A
B
Magnitude
8.20
10.30
Separation PA
—
—
5.3 346 +
Year
—
1931
Notes:
1830: 6.1 @ 342. 10 measurements.
Observations:
C8 at 104x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 27.2 inches.
Separation: AB = 3.29 miles.
Distance (LY): 398
Total luminosity (Suns): 8
- 15 -
Spectra
K2
Colors
Y
pO
Zone 75
STF 2261
ADS 10953; HD 164394; SAO 30665
Rating: 3 E
Position: 1758+5213
A
B
Magnitude
7.43
10.05
Separation PA
—
—
9.6 +
262 -
Year
—
1991
Spectra
A2
Colors
Y
O
Notes:
1829: 9.2 @ 263. 16 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 = 6.80 inches.
Separation: AB = 4.70 miles.
Distance (LY): 314
Total luminosity (Suns): 10
Espin 637
ADS 10670
Rating: 4 E
Position: 1736+5425
A
B
Magnitude
10.41
10.59
Separation PA
—
—
4.1 +
116 -!!
Year
—
1992
Notes:
1902: 3.9 @ 296. 5 measurements. Quadrant reversal?
Observations:
C11 at 115x! This is the southwest star of a wide 11m pair.
- 16 -
Spectra
Colors
W
W
Zone 75
Espin 2661
HD 160469; SAO 30486
Rating: 4 E
Position: 1737+5040
A
B
Magnitude
8.32
9.77
Separation PA
—
—
58.2 +
102 -
Year
—
1991
Spectra
K5
Colors
O
B
Notes:
1902: 58.1 @ 104. 6 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 35.0 inches.
Separation: AB = 179 miles.
Distance (LY): 1,970
Total luminosity (Suns): 190
STF 2225
ADS 10777; HD 234484; SAO 30551
Rating: 5 E
Position: 1745+5157
A
B
C
D
CD
Magnitude
8.90
10.90
9.70
10.10
Separation
—
5.5 +
230.7 -
PA
—
340 66 =?
Year
—
1958
1924
8.8 -
304 -
1958
Spectra
K2
G5
K8
Colors
Y
W
No
No
Notes:
AB 1868: 4.8 @ 343. 14 measurements. The stars show similar proper motions.
AC 1869: 231.2 @ 246. 6 measurements. Quadrant reversal?
CD 1830: 9.1 @ 314. 27 measurements.
Dembowski found a pair east of here, and Lewis measured it (1904) at 5.9 @ 335.
- 17 -
Zone 75
Observations:
C8 at 104x.
Espin 78
ADS 10941; HD 234522; SAO 30657
Rating: 5 E
Position: 1757+5111
A
B
Magnitude
9.35
12.19
Separation PA
—
—
7.3 +
131 -
Year
—
1991
Spectra
G0
Colors
W
yO
Notes:
AB 1901: 6.5 @ 137. 6 measurements.
Fox also notes a 1" double (12 mag.) from A at 23.0 @ 199.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.3 inches.
Separation: AB = 5.69 miles.
Distance (LY): 500
Total luminosity (Suns): 3.45
Moderate
P Muller 605
HD 234487; SAO 30556
Rating: 5 M
Position: 1746+5326
A
B
Magnitude
9.57
12.20
Separation PA
—
—
12.0
37
Notes:
1 measurement.
- 18 -
Year
—
1981
Spectra
F5
Colors
W
W?
Zone 75
Observations:
C11 at 115x. Nice field.
Difficult
Gamma Dra
Rating: 5 D
33 Dra; Eltanin; Bur 633; ADS 10923; HD 164058; SAO 30653
Position: 1757+5129
A
B
C
D
E
Magnitude
2.24
13.40
12.90
12.90
11.90
Separation
—
20.9 =
45.7 57.7 +
96.9 -
PA
—
152 =
230 +
12 235 =
Year
—
1934
1898
1915
1913
Spectra
K5 IIIe
Colors
Y
No
?
?
?
Notes:
AB 1878: 20.9 @ 152. 7 measurements. The primary is an infra-red source and is
variable.
AC 1878: 47.9 @ 227. 2 measurements.
AD 1878: 56.7 @ 14. 3 measurements.
AE 1898: 97.5 @ 235. 3 measurements.
AF (11.20m) 1879: 124.8 @ 116. 1976: 127.2 @ 118. 5 measurements.
AG (11.90m) 1898: 139.2 @ 28. 1913: 140.1 @ 28. 3 measurements.
From James Kaler's Star Notes:
It is the closest bright star to the "winter" side of the "solstitial colure," the circle in
the sky that passes through the poles and winter and summer solstices, the star lying
almost exactly 75o north of the winter solstice in Sagittarius. Eltanin's high northerly
position also takes it nearly through the zenith, the point overhead, as seen from London,
causing it to acquire the now obscure name "zenith star." As a result the star was heavily
studied.
In attempting to find stellar parallax, the annual shift in stellar position caused by the
shifting position of the orbiting Earth (from which we get stellar distance), in 1728 James
Bradley discovered in "aberration of starlight," which is caused by the velocity of the
moving Earth relative to the speed of the light coming from the star. The discovery once
and for all proved that Copernicus was right and that the Earth truly does move around
the central Sun. Eltanin is also moving toward us, and will make a close pass at a distance
of 28 light years 1.5 million years from now, when it will be the brightest star in the sky
and will rival our current Sirius.
- 19 -
Zone 75
Physically, Eltanin is a cool (4,000 Kelvin) class K orange giant, its only marked
characteristic a slightly low iron abundance. Calculations from the temperature and
luminosity as well as from the measured angular diameter agree that the star is 50 times
the solar diameter, a bit over half the size of Mercury's orbit. As a giant it is dying, its
days of core hydrogen fusion long over. Beginning life as a star with a mass about 1.7
times that of the Sun, it is now probably slowly increasing in brightness as it prepares to
fire its internal helium.
Observations:
C8 at 104x. Averted vision is needed to glimpse the "puppies". This one is a real
dud.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 154 inches.
Separation: AB = 4.82 miles; AC = 10.5 miles; AD = 13.3 miles.
Distance (LY): 148
Total luminosity (Suns): 600
Zone 75, Map 4
Double Stars
Easy
STF 2189 rej
ADS 10630; HD 159543; SAO 46791
Rating: 4 E
Position: 1733+4753
A
B
C
Magnitude
7.82
11.63
8.94
Separation
—
21.3 +
66.3 +
PA
—
98 358 -
Notes:
AB 1900: 20.6 @ 99. 12 measurements.
AC 1901: 65.0 @ 0. 13 measurements.
- 20 -
Year
—
1999
1999
Spectra
A0 V
Colors
W
?
L
Zone 75
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 20.3 miles; AC = 63.1 miles.
Distance (LY): 610
Total luminosity (Suns): 32
Espin 1257
ADS 10686
Rating: 4 E
Position: 1738+4500
A
B
C
Magnitude
10.31
10.60
10.36
Separation
—
2.8 +
52.7 -
PA
—
294 123 +
Year
—
1966
1991
Spectra
Colors
W
No
W
Notes:
AB 1893: 2.5 @ 296. 11 measurements.
AC 1893: 55.6 @ 121. 9 measurements. May be optical because Hipparcos gives
different distances (66 and 126 light years).
Observations:
C8 at 104x. Nice field!
Smart 79
Rating: 4 E
Position: 1748+4506
A
B
Magnitude
10.51
10.77
Separation PA
—
—
15.8 87 +
Notes:
1925: 17.5 @ 76. 2 measurements.
- 21 -
Year
—
1991
Spectra
Colors
yW
bW
Zone 75
Observations:
C11 at 115x.
Espin 1259
ADS 10864
Rating: 5 E
Position: 1752+4656
A
B
Magnitude
9.17
9.80
Separation PA
—
—
6.5 +
227 +
Year
—
1937
Spectra
Colors
W
W
Notes:
1901: 6.4 @ 226. 4measurements.
Observations:
C8 at 104x. This pair is the E end of a 3-star 9m chain.
Distance (LY): 384
Total luminosity (Suns): 3
STF 2251
ADS 10889; HD 163619; SAO 47056
Rating: 5 E
Position: 1755+4938
A
B
Magnitude
8.70
11.70
Separation PA
—
—
15.6 +
23 -!
Year
—
1961
Notes:
1830: 14.4 @ 33. 11 measurements.
Observations:
C8 at 104x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 25.3 inches.
Separation: AB = 7.71 miles.
Distance (LY): 317
Total luminosity (Suns): 2.1
- 22 -
Spectra
K0
Colors
Y
W
Zone 75
Barnard 43
ADS 10906
Rating: 5 E
Position: 1756+4626
A
B
C
Magnitude
10.19
13.20
10.68
Separation
—
2.1 +
33.5 +
PA
—
255 +!?
314 -
Year
—
1948
1991
Spectra
A5
Colors
W
No
?
Notes:
AB 1921: 2.0 @ 76. 2 measurements. Quadrant reversal?
AC 1893: 32.7 @ 316. 5 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.18 inches.
Separation: AB = 1.17 miles; AC = 18.7 miles.
Distance (LY): 358
Total luminosity (Suns): 1.23
Moderate
Iota Her
Bur 1459; Blazit 5 (a); HD 160762; SAO 46872
Rating: 5 M
Position: 1740+4600
A
B
Magnitude
3.76
11.80
Separation PA
—
—
117.1 +
49 +
Year
—
1991
Spectra
B3 IV
Notes:
1893: 115.1 @ 48. 3 measurements.
A is a spectroscopic binary, now resolved by speckle interferometry.
Observations:
C11 at 115x.
- 23 -
Colors
W
W
Zone 75
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.9 inches.
Separation: AB = 90.6 miles.
Distance (LY): 496
Total luminosity (Suns): 617
STF 2210
ADS 10736; HD 161286; SAO 46899
Rating: 5 M
Position: 1742+4900
A
B
Magnitude
8.59
10.06
Separation PA
—
—
3.2 +
121 -
Year
—
1998
Spectra
K0
Colors
Y
W
Notes:
1831: 3.0 @ 122. 23 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 25.2 inches.
Separation: AB = 5.19 miles.
Distance (LY): 1,040
Total luminosity (Suns): 39
STF 2258
ADS 10924; SAO 47081
Rating: 5 M
Position: 1757+4837
A
B
Magnitude
8.70
9.66
Separation PA
—
—
2.1 221 =
Notes:
1830: 2.6 @ 221. 26 measurements.
- 24 -
Year
—
1998
Spectra
G5
Colors
W
W
Zone 75
Observations:
C8 at 280x.
Difficult
Hussey 235
ADS 10934; HD 164059; SAO 47084
Rating: 3 D
Position: 1757+4551
A
B
Magnitude
6.75
9.16
Separation PA
—
—
1.6 +
281 +
Year
—
1991
Spectra
F5 IV
Colors
W
O
Notes:
1900: 1.5 @ 265. 25 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.32 inches.
Separation: AB = 3,115 feet.
Distance (LY): 238
Total luminosity (Suns): 9.2
Hussey 923
ADS 10646; SAO 46807
Rating: 4 D
Position: 1734+4913
A
B
Magnitude
9.49
9.90
Separation PA
—
—
0.9 106 +
Year
—
1998
Notes:
1904: 1.0 @ 100. 18 measurements.
Observations:
C11 at 634x. I got a figure "8" on a night of good seeing.
- 25 -
Spectra
G0
Colors
yW
W
Zone 75
Fox 202
HD 159318; SAO 46777
Rating: 5 D
Position: 1732+4943
A
B
Magnitude
7.76
13.21
Separation PA
—
—
44.4
230
Year
—
1909
Notes:
1 measurement.
Observations:
C8 at 104x. This star lies N of an E-W line of three 9m stars.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 23.9 inches.
Separation: AB = 51.3 miles.
Distance (LY): 740
Total luminosity (Suns): 32.22
- 26 -
Spectra
K0
Colors
Y
W?
Zone 75
Zone 75 Mini-Catalog
Designation
Position
Rating
Map
STF 2164
1724+4716
2E
2
Espin 1090
1701+4817
3E
2
STF 2229
1746+5011
3E
3
STF 2261
1758+5213
3E
3
OSS 151
1704+5314
4E
1
OS 323
1705+4658
4E
2
STF 2138
1710+5430
4E
1
Bur 1249
1722+5351
4E
1
STF 2167 rej
1724+4931
4E
2
STF 2177
1728+4625
4E
2
STF 2189 rej
1733+4753
4E
4
Espin 637
1736+5425
4E
3
Espin 2661
1737+5040
4E
3
Espin 1257
1738+4500
4E
4
Smart 79
1748+4506
4E
4
Espin 776
1718+5346
5E
1
Beta Dra
1730+5218
5E
1
STF 2225
1745+5157
5E
3
Espin 1259
1752+4656
5E
4
STF 2251
1755+4938
5E
4
Component
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
C
A
B
A
B
A
B
C
A
B
A
B
C
BC
A
B
A
B
C
D
CD
A
B
A
B
- 27 -
Mag
7.92
9.64
10.60
10.60
8.20
10.30
7.43
10.05
7.82
9.34
8.24
11.21
8.85
9.34
9.26
10.20
9.76
8.09
10.21
9.28
10.68
7.82
11.63
8.94
10.41
10.59
8.32
9.77
10.31
10.60
10.36
10.51
10.77
9.30
10.98
11.40
2.79
12.70
8.90
10.90
9.70
10.10
9.17
9.80
8.70
11.70
Separation
—
9.2 +
—
5.0 —
5.3 —
9.6 +
—
84.7 +
—
10.8 +
—
22.3 =
—
0.4 =
62.2 —
20.3 +
—
3.6 +
—
21.3 +
66.3 +
—
4.1 +
—
58.2 +
—
2.8 +
52.7 —
15.8 —
28.8 -
PA
—
13 —
277 =
—
346 +
—
262 —
172 —
81 —
134 —
271 +?
62.2 —
210 —
135 +
—
98 66.3 +
—
116 -!!
—
102 —
294 52.7 —
87 +
—
154 +
2.6 +
—
117.4 +
—
5.5 +
230.7 -
311 —
156 —
340 230.7 -
8.8 —
6.5 +
—
15.6 +
304 —
227 +
—
23 -!
Zone 75
Designation
Position
Rating
Map
Barnard 43
1756+4626
5E
4
Espin 78
1757+5111
5E
3
Mu Dra
1705+5428
1M
1
STF 2180
1729+5052
3M
1
STF 2133
1709+4945
4M
2
STF 2142
1712+4945
4M
2
Espin 1255
1701+4616
5M
2
Espin 77
1708+5051
5M
1
STF 2146
1713+5408
5M
1
Hussey 672
1726+5130
5M
1
Stone 35
1728+4616
5M
2
Iota Her
1740+4600
5M
4
STF 2210
1742+4900
5M
4
P Muller 605
1746+5326
5M
3
STF 2258
1757+4837
5M
4
STF 2152
1718+4535
2D
2
STF 2153
1718+4918
3D
2
Hussey 235
1757+4551
3D
4
Couteau 1773
1707+4604
4D
2
Kuiper 79
1712+4540
4D
2
Hussey 923
1734+4913
4D
4
Fox 202
1732+4943
5D
4
Gamma Dra
1757+5129
5D
3
Component
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
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
A
B
C
A
B
A
B
A
B
C
D
E
- 28 -
Mag
10.19
13.20
10.68
9.35
12.19
4.91
5.78
7.08
7.41
9.32
10.57
6.12
9.68
8.02
11.70
6.46
10.89
6.90
9.20
8.87
8.93
10.87
11.43
11.90
3.76
11.80
8.59
10.06
9.57
12.20
8.70
9.66
9.79
9.89
9.36
9.80
6.75
9.16
10.27
10.50
9.31
9.54
14.20
9.49
9.90
7.76
13.21
2.24
13.40
12.90
12.90
11.90
Separation
—
2.1 +
33.5 +
—
7.3 +
—
2.2 —
2.9 —
3.4 +
—
4.9 —
8.4
—
18.3 +
—
2.7 =
89.2 +
—
4.3 —
7.5 —
117.1 +
—
3.2 +
—
12.0
—
2.1 —
1.9 =
—
1.4 —
1.6 +
—
0.7 =
—
1.1 =
41.4 +
—
0.9 —
44.4
—
20.9 =
45.7 57.7 +
96.9 -
PA
—
255 +!?
33.5 +
—
131 —
20 -!!
—
260 —
199 —
110 —
45
—
274 =
—
223 89.2 +
—
58 —
183 =
—
49 +
—
121 —
37
—
221 =
—
237 —
248 —
281 +
—
25 +
—
231 +
41.4 +
—
106 +
—
230
—
152 =
45.7 57.7 +
235 =