Zone 181, Master Map
Menkarα
κ2
κ1
c
+00°00'
+02°00'
e
+04°00'
+06°00'
Normal View
Zone Master, Normal View, 10 deg FOV
Eridanus
Cetus
d
-04°00'
f
-02°00'
Taurus
04h 00m
03h 52m
03h 44m
03h 36m
03h 28m
03h 20m
03h 12m
03h 04m
Zone 181, Map 1
Normal Image
A 2032
Baillaud 2110
A 2417
α
Menkar
Alpha Cet
+04°00'
+05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Harvard 62
κ2
Kappa 1 Cet
+03°00'
κ1
A 2415
+01°00'
+02°00'
Baillaud 1629
Hough 320
STF 367
Gauchet 2
STF 393
03h 25m
03h 20m
03h 15m
03h 10m
03h 05m
Zone 181, Map 1
Mirror Image
A 2032
Baillaud 2110
A 2417
Menkar
Harvard 62
κ2
+03°00'
Kappa 1 Cet κ1
+02°00'
A 2415
Baillaud 1629
Hough 320
+01°00'
Alpha Cetα
+04°00'
+05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 367
Gauchet
2
Gauchet
2
STF 393
03h 05m
03h 10m
03h 15m
03h 20m
03h 25m
Zone 181, Map 2
Normal Image
Gauchet 2
STF 393
95 Cet
Taurus
Schjellerup 2
-03°00'
STF 341
-02°00'
-01°00'
Cetus
+00°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
h3554
Bur 528
STF 358
-04°00'
Bur 400
STF 365 rej
Bur 1180
03h 30m
03h 25m
03h 20m
03h 15m
03h 10m
03h 05m
03h 00m
Zone 181, Map 2
Mirror Image
+00°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Gauchet 2
STF 393
Cetus
Taurus
-01°00'
95 Cet
-02°00'
Schjellerup 2
-03°00'
STF 341
h3554
Bur 528
STF 358
-04°00'
Bur 400
STF 365 rej
Bur 1180
03h 00m
03h 05m
03h 10m
03h 15m
03h 20m
03h 25m
03h 30m
Zone 181, Map 3
Normal Image
STF 430
OSS 41
A. G. 69
+04°00'
+05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+03°00'
h2205
Baillaud 1260
Baillaud 1259
+02°00'
Baillaud 1639
+01°00'
STF 456 rej
STF 422
10 Tau
STF 463
h2202
Eridanus
Baillaud 658
h668
04h 00m
03h 55m
03h 50m
03h 45m
03h 40m
03h 35m
03h 30m
Zone 181, Map 3
Mirror Image
OSS 41
STF 406
+04°00'
STF 430
+05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
A. G. 69
+03°00'
h2205
+02°00'
Baillaud 1639
Baillaud 1260
Baillaud 1259
+01°00'
STF 456 rej
STF 422
10 Tau
STF 463
h2202
Eridanus
Baillaud 658
h668
03h 30m
03h 35m
03h 40m
03h 45m
03h 50m
03h 55m
04h 00m
Zone 181, Map 4
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+00°00'
h2202
Eridanus
Baillaud 658
-01°00'
h668
Taurus
Engelmann 15
Bur 543
Bur 401
-02°00'
STF 468
STF 466
STF 417 rej
32 Eri
STF 408
-04°00'
-03°00'
Bur 1042
h2201
04h 00m
03h 55m
03h 50m
03h 45m
03h 40m
03h 35m
03h 30m
Zone 181, Map 4
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
h668
Taurus
Engelmann 15
Bur 543
-01°00'
+00°00'
h2202
Eridanus
Baillaud 658
STF 468
STF 466
-02°00'
Bur 401
-04°00'
32 Eri
-03°00'
STF 417 rej
STF 408
h2201
03h 30m
03h 35m
03h 40m
03h 45m
03h 50m
03h 55m
04h 00m
Zone 181
2 Reference Stars, 39 Double Stars
Flamsteed
G
10 Tau .................................................. 12
32 Eri ................................................... 18
95 Cet................................................... 11
Gauchet 2 ............................................... 5
H
A 2415 ................................................... 3
A 2417 ................................................... 3
A. G. 69 ............................................... 14
Alpha Cet............................................... 2
h2202 ................................................... 17
h2205 ................................................... 15
h3554 ..................................................... 9
h668 ..................................................... 22
Harvard 62 ............................................. 4
Hough 320.............................................. 6
B
K
Baillaud 1259....................................... 15
Baillaud 1260....................................... 13
Baillaud 1629......................................... 4
Baillaud 1639....................................... 15
Baillaud 2110......................................... 4
Baillaud 658......................................... 16
Bur 1042 .............................................. 20
Bur 1180 ................................................ 8
Bur 400 ................................................ 10
Bur 401 ................................................ 21
Bur 528 ................................................ 12
Bur 543 ................................................ 20
Kappa 1 Cet ........................................... 5
A
S
Schjellerup 2 .......................................... 7
STF 341.................................................. 9
STF 358.................................................. 8
STF 365 rej .......................................... 10
STF 367.................................................. 6
STF 393................................................ 11
STF 408................................................ 22
STF 417 rej .......................................... 19
STF 422................................................ 13
STF 456 rej .......................................... 14
STF 463................................................ 16
STF 466................................................ 19
STF 468................................................ 17
E
Engelmann 15 ...................................... 21
-1-
Zone 181
Zone 181, Map 1
Reference Star
Alpha Cet (Menkar, "the nose" of the whale; 92 Cet; HD 18884; SAO 110920)
Position: 0302+0405
Mag : 2.54
Spectrum : M2 III
Color : O
Assumed distance: 220 light years
Assumed luminosity (suns): 390
Notes:
It is an infra-red source.
From James Kaler's Star Notes:
Though Menkar represents the jaws of the great beast, it inappropriately received a
name that from Arabic means "the nose" or "nostrils." Menkar is a cool red (class M)
giant with a temperature of only about 3,700 Kelvin. From its distance of 220 light years,
we find a visual luminosity, as it appears to the eye, 380 times that of the Sun. However,
because Menkar is so cool, it radiates much of its light in the infrared where we cannot
see it. If that is taken into account, Menkar becomes some five times brighter, its total
energy release 1800 times solar.
It is a true giant, temperature and luminosity combining to give a radius 84 times that
of the Sun. Its size and relative proximity also allow measure of angular diameter (0.0116
seconds of arc), which yields a slightly smaller (but still satisfyingly close) physical
radius 77 times solar, about the size of Mercury's orbit.
The star has a variety of characteristics that rather set it apart. It is a light irregular
variable, changing its brightness erratically by about six percent. (It is technically known
as an "Lb," or "giant irregular," variable). Menkar is also notably deficient in carbon,
having less than 20% the amount found in the Sun. More interesting perhaps is that it is
also observed as a source of radio waves, the radiation coming from a cool wind that
blows from the star's surface. Though its exact evolutionary status is uncertain, it is
surely dying. The best estimate is that it began life with about three times the mass of the
Sun, has quit fusing hydrogen to helium in its core (as the Sun is doing now), has already
passed the stage in which it fuses the helium to carbon, and is now entering the stage in
which the carbon core contracts. Menkar is then on its way to becoming another great
unstable variable like its constellation-mate Mira, its fate to lose its outer hydrogen
envelope and turn into a fairly massive white dwarf similar to the companion to Sirius.
-2-
Zone 181
Double Stars
Easy
A 2415
Rating: 3 E
ADS 2305
Position: 0302+0238
A
B
Magnitude
10.43
10.50
Separation PA
—
—
2.7 +
247 +
Year
—
1999
Spectra
F8
Colors
W
W
Notes:
1912: 2.4 @ 246. 12 measurements.
Observations:
C11 at 115x!
A 2417
Rating: 3 E
ADS 2556; HD 21497; SAO 111209
Position: 0328+0409
A
B
Magnitude
8.69
9.56
Separation PA
—
—
72.6 +
56 =?
Year
—
1991
Spectra
F8
Colors
W
W
Notes:
1909: 73.4 @ 236. 10 measurements. The stars share common proper motion.
However, May be optical because Hipparcos gives different distances (321 and 2,965
light years). Quadrant reversal?
B has a 10.8m companion at 0.9 @ 139 (1997).
Observations:
C8 at 83x. The quadrant is wrong— it should be pa56.
Scale Model (in which the Sun is a baseball):
Diameter: A = 3.60 inches.
Separation: AB = 36.4 miles.
Distance (LY): 321
Total luminosity (Suns): 4
-3-
Zone 181
Baillaud 1629
Position: 0302+0233
A
B
Magnitude
10.24
10.61
Rating: 4 E
Separation PA
—
—
11.1 298 +
Year
—
1962
Spectra
Colors
W
yW
Notes:
1909: 11.6 @ 295. 3 measurements.
The stars show similar proper motions.
Observations:
C8 at 83x.
Distance (LY): 320
Total luminosity (Suns): 1.13
Baillaud 2110
Position: 0303+0414
A
B
Magnitude
9.48
9.90
Rating: 4 E
Separation PA
—
—
8.3 223 -
Year
—
1992
Spectra
Colors
W
W
Notes:
1910: 9.0 @ 224. 2 measurements.
Observations:
C11 at 115x.
Harvard 62
Position: 0302+0348
A
B
Magnitude
10.75
10.91
Rating: 5 E
Separation PA
—
—
39.2 123 +
Notes:
1868: 39.6 @ 120. 11 measurements.
-4-
Year
—
1991
Spectra
F8
Colors
W
W
Zone 181
Observations:
C11 at 115x. Alpha Cet is 30 min N.
Gauchet 2
Baillaud 652; SAO 130249
Rating: 5 E
Position: 0302+0005
A
B
Magnitude
9.72
11.07
Separation PA
—
—
8.0 138 -
Year
—
1991
Spectra
G0
Colors
W
?
Notes:
1891: 8.3 @ 140. 5 measurements.
The stars share common proper motion.
Observations:
C8 at 104x.
Kappa 1 Cet
OS 557; Bpm 42 (C); HD 20630; SAO 111120
Rating: 5 E
Position: 0319+0322
A
B
C
BC
Magnitude
4.83
8.86
11.90
Separation PA
—
—
266.2 162 +
215.1
Year
—
1991
1909
Spectra
G5 Vv
Colors
Y
W
?
272
Notes:
AB 1853: 271.4 @ 153. 9 measurements. Optical pair. HIpparcos shows different
distances (30 and 189 light years).
Is A variable? A is also a spectroscopic binary and a very high proper motion star.
BC 1 measurement.
Observations:
C11 at 115x.
-5-
Zone 181
Moderate
Hough 320
Rating: 5 M
ADS 2484; HD 20771; SAO 111138
Position: 0321+0110
A
B
Magnitude
8.55
10.50
Separation PA
—
—
2.1 +
173 +
Year
—
1991
Spectra
G0 V
Colors
W
?
Notes:
1890: 1.2 @ 168. 19 measurements.
Observations:
C8 at 280x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 6.60 inches.
Separation: AB = 3,772 feets.
Distance (LY): 218
Total luminosity (Suns): 1.6
Difficult
STF 367
Rating: 3 D
ADS 2416; HD 20115; SAO 111062
Position: 0314+0044
A
B
Magnitude
8.19
8.90
Separation PA
—
—
1.2 +
137 -!
Year
—
1999
Spectra
F8 V
Colors
W
W
Notes:
1831: 1.0 @ 281. Over 100 measurements. The orbit takes 870 years, with a - 1.31",
retrograde motion.
Observations:
C8 at 697x.
-6-
Zone 181
Scale Model (in which the Sun is a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 1,954 feet.
Distance (LY): 200
Total luminosity (Suns): 4.3
Zone 181, Map 2
Double Stars
Easy
Schjellerup 2
Rating: 4 E
HD 21214
Position: 0325-0110
A
B
Magnitude
8.25
10.11
Separation PA
—
—
17.1 =
183 -
Year
—
1991
Notes:
1879: 17.1 @ 184. 15 measurements.
The stars share common proper motion.
Observations:
C11 at 115x.
Scale Model (in which the Sun is a baseball):
Diameter: 11.7 inches.
Separation: AB = 25.6 miles.
Distance (LY): 960
Total luminosity (Suns): 41.1
-7-
Spectra
F5
Colors
W
oW
Zone 181
Bur 1180
Rating: 4 E
ADS 2562; HD 21529; SAO 130510
Position: 0328-0434
A
B
C
Magnitude
7.59
9.78
8.13
Separation
—
0.4 =
7.0 -
PA
—
23 117 -
Year
—
1995
1991
Spectra
A2
Colors
yW
No
?
Notes:
AB 1890: 0.4 @ 25. 13 measurements.
AC 1890: 7.1 @ 118. 7 measurements.
Observations:
C8 at 83x. A 10m star is 10 min NNW.
Scale Model (in which the Sun is a baseball):
Diameter: A = 10.8 inches.
Separation: AB = 2,241 feet; AC = 7.43 miles.
Distance (LY): 680
Total luminosity (Suns): 54
STF 358
Rating: 5 E
ADS 2369; HD 19570
Position: 0309-0342
A
B
Magnitude
8.90
11.90
Separation PA
—
—
15.3 +
349 =
Notes:
1833: 15.2 @ 349. 10 measurements.
Observations:
C8 at 104x.
-8-
Year
—
1962
Spectra
G5
Colors
W
?
Zone 181
Moderate
STF 341
Rating: 3 M
ADS 2316; HD 18975; SAO 130256
Position: 0303-0206
A
B
Magnitude
7.51
9.85
Separation PA
—
—
8.7 +
223 -
Year
—
1991
Spectra
F5 V
Colors
W
B
Notes:
1831: 8.6 @ 230. 18 measurements.
Observations:
C8 at 83x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 11.2 inches.
Separation: AB = 2.35 miles.
Distance (LY): 173
Total luminosity (Suns): 2.34
h3554
Rating: 4 M
HD 19996; SAO 130354
Position: 0313-0255
A
B
Magnitude
8.65
11.91
Separation PA
—
—
19.5 346 -
Year
—
1991
Notes:
1879: 19.9 @ 348. 8 measurements.
Observations:
C8 at 104x. B is very faint.
Scale Model (in which the Sun is a baseball):
Diameter: A = 9.75 feet.
Separation: AB = 54.8 miles.
Distance (LY): 1,800
Total luminosity (Suns): 104
-9-
Spectra
K0
Colors
Y
?
Zone 181
Bur 400
Rating: 5 M
ADS 2389; HD 19836; SAO 130328
Position: 0311-0349
A
B
Magnitude
6.05
11.90
Separation PA
—
—
24.2 51 -
Year
—
1985
Spectra
M0 III
Colors
yO
W?
Notes:
1879: 22.2 @ 53. 11 measurements.
Observations:
C11 at 115x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 63.0 inches.
Separation: AB = 29.5 miles.
Distance (LY): 780
Total luminosity (Suns): 181
STF 365 rej
Rating: 5 M
Position: 0313-0414
A
B
Magnitude
10.19
11.10
Separation PA
—
—
12.7 =
143 +
Year
—
1981
Notes:
1895: 12.7 @ 142. 5 measurements.
Observations:
C11 at 115x.
Distance (LY): 520
Total luminosity (Suns): 2.53
- 10 -
Spectra
Colors
W
W?
Zone 181
STF 393
Rating: 5 M
ADS 2533
Position: 0326+0001
A
B
Magnitude
8.68
11.50
Separation PA
—
—
15.6 257 -
Year
—
1991
Spectra
F8
Colors
W
?
Notes:
1834: 16.0 @ 260. 9 measurements.
Observations:
C8 at 83x. Two 9m stars lie 15 min SW.
Difficult
95 Cet
AC 2; ADS 2459; HD 20559; SAO 130408
Rating: 4 D
Position: 0318-0056
A
B
Magnitude
5.62
7.97
Separation PA
—
—
1.2 +
256 +?
Year
—
1999
Spectra
K1 IV
G5 IV
Colors
Y!
Y
Notes:
1854: 0.7 @ 73. 84 measurements. Single in 1890-91. The orbital period is
uncertain, with at least two solutions known: 217.2 years (Jastrzebski, 1961; semi-major
axis is 0.97", direct motion) and 352 years (semi-major axis of 1.08", direct motion). The
primary is an infra-red emitter. Quadrant reversal?
Member of the Sigma Pup group.
Observations:
C8 at 280x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 12.5 feet; B = 9.00 inches.
Separation: AB = 2,195 feet.
Distance (LY): 222
Total luminosity (Suns): 26.3
- 11 -
Zone 181
Bur 528
Rating: 5 D
ADS 2366; HD 19542; SAO 130304
Position: 0308-0336
A
B
C
Magnitude
8.77
9.65
12.21
Separation
—
0.3 49.4 +
PA
—
182 102 +
Year
—
1995
1991
Spectra
F5
Colors
W
No
?
Notes:
AB 1877: 1.0 @ 198. 37 measurements.
AC 1896: 48.5 @ 100. 3 measurements.
Observations:
C8 at 83x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 4.35 inches.
Separation: AB = 1,105 feet; AC = 34.5 miles.
Distance (LY): 447
Total luminosity (Suns): 5.33
Zone 181, Map 3
Reference Star
10 Tau (; HD 22484; SAO 111292)
Position: 0337+0024
Mag : 4.29
Spectrum : F9 V
Color : W
Assumed distance: 45 light years
Assumed luminosity (suns): 3.0
Notes:
This star is an infra-red source.
- 12 -
Zone 181
Double Stars
Easy
STF 422
V711 Tau; ADS 2644; HD 22468; SAO 111291
Rating: 3 E
Position: 0337+0035
A
B
Magnitude
5.82
8.80
Separation PA
—
—
6=
259 +
Year
—
1975
Spectra
G5 V
K1 IV
Colors
O
Y
Notes:
1822: 5.4 @ 226. Over 100 measurements. Star A is a spectroscopic binary with a
2.8378 day period and a radio flare stare (V711 Tau, an RS CVn type). The visual binary
orbital period is about 2,101 years (Hopmann, 1964).
Observations:
C8 at 206x. Some observers report Y and B. Webb saw them as D and B. The dY
star 10 Tau is 11 min S.
Scale Model (in which the Sun is a baseball):
Diameter: A = 13.4 inches; B = 37.1 inches.
Separation: AB = 4,646 feet.
Distance (LY): 94
Total luminosity (Suns): 3.24
Baillaud 1260
Position: 0343+0202
A
B
Magnitude
10.40
10.60
Rating: 3 E
Separation PA
—
—
12.0 +
182 =
Notes:
1908: 11.8 @ 182. 5 measurements.
Observations:
C8 at 83x.
- 13 -
Year
—
1970
Spectra
Colors
W
W
Zone 181
A. G. 69
Rating: 4 E
ADS 2606; HD 22033; SAO 111254
Position: 0333+0409
A
B
Magnitude
10.04
10.35
Separation PA
—
—
6.6 =
354 =
Year
—
1991
Spectra
F8
Colors
W
W
Notes:
1903: 6.6 @ 354. 15 measurements.
Observations:
C11 at 115x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 3.60 inches.
Separation: AB = 3.73 miles.
Distance (LY): 362
Total luminosity (Suns): 1.77
STF 456 rej
Rating: 4 E
HD 23855; SAO 111431
Position: 0348+0136
A
B
Magnitude
9.19
10.09
Separation PA
—
—
22.2 +
121 +
Year
—
1991
Spectra
F0 V?
Colors
W
B?
Notes:
1879: 21.8 @ 119. 13 measurements. The stars share common proper motion.
Observations:
C8 at 104x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 12.4 inches.
Separation: AB = 25.6 miles.
Distance (LY): 740
Total luminosity (Suns): 14
- 14 -
Zone 181
Baillaud 1259
Position: 0335+0146
A
B
Magnitude
9.91
11.20
Rating: 5 E
Separation PA
—
—
7.4 +
196 +
Year
—
1991
Spectra
Colors
W
W?
Notes:
1909: 6.8 @ 195. 2 measurements.
Observations:
C11 at 115x.
h2205
Position: 0346+0325
A
B
Magnitude
10.30
11.17
Rating: 5 E
Separation PA
—
—
39.0 +
141 =
Year
—
1991
Spectra
Colors
W
W?
Notes:
1910: 37.2 @ 141. 7 measurements.
Observations:
C11 at 115x. Very faint. Two 8m stars to the SW are a nice view. They are about
15m apart (E-W).
Baillaud 1639
Rating: 5 E
SAO 111412
Position: 0347+0220
A
B
Magnitude
9.68
13.41
Separation PA
—
—
13.6 +
213 =
Notes:
1909: 13.4 @ 213. 2 measurements.
- 15 -
Year
—
1986
Spectra
Colors
W
W
Zone 181
Observations:
C11 at 115x.
Distance (LY): 930
Total luminosity (Suns): 9.4
STF 463
Rating: 5 E
ADS 2818; HD 24254; SAO 111466
Position: 0352+0020
A
B
Magnitude
9.82
11.90
Separation PA
—
—
9.8 193 -
Year
—
1962
Spectra
K0
Colors
yO
W
Notes:
1831: 10.8 @ 204. 11 measurements. The stars have different proper motions.
Observations:
C11 at 115x.
Moderate
Baillaud 658
Position: 0341+0005
A
B
Magnitude
10.94
11.13
Rating: 5 M
Separation PA
—
—
17.0 +
271 -
Year
—
1991
Notes:
1894: 16.2 @ 274. 4 measurements.
Observations:
C8 at 104x.
Distance (LY): 46
Total luminosity (Suns): 0.03
- 16 -
Spectra
Colors
W
W
Zone 181
h2202
Position: 0343+0015
A
B
Magnitude
10.16
12.44
Rating: 5 M
Separation PA
—
—
20.0
90
Year
—
1830
Spectra
Colors
W
W?
Notes:
1 measurement.
The digitized sky survey (1990.806 plate) shows 33.2 @ 79.
Observations:
C11 at 115x.
Distance (LY): 550
Total luminosity (Suns): 2.32
Zone 181, Map 4
Double Stars
Easy
STF 468
Rating: 3E
ADS 2837; HD 24435
Position: 0353-0150
A
B
C
BC
Magnitude
8.98
11.99
10.00
Separation PA
—
—
21.1 +
97 1.7 +
67 -
Year
—
1991
Spectra
F8 IV?
Colors
W
W
No
1999
Notes:
AB 1831: 20.1 @ 98. 22 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical.
- 17 -
Zone 181
BC 1898 (Burnham): 1.0 @ 81. 16 measurements.
Scale Model (in which the Sun is a baseball):
Diameter: A = 12.2 inches.
Separation: AB = 21.4 miles.
Distance (LY): 650
Total luminosity (Suns): 13
STF 468
Observed with C11
on 11/19/03; s6, t6
Magnification: 98x
32 Eri
w Eri; STF 470; ADS 2850; HD 24555; SAO 130806
Astronomical League Program: Double Star Club
Rating: 2 E
Position: 0354-0257
A
B
C
Magnitude
4.46
5.65
11.60
Separation
—
6.9 +
165.3 -
PA
—
348 4-
Year
—
1991
1963
Spectra
G8 III
A1 V
Colors
O
W
No
Notes:
AB 1822: 6.6 @ 350. Over 100 measurements. The primary is a spectroscopic
binary and an infra-red source.
AC 1886: 165.5 @ 5. 5 measurements.
Observations:
C8 at 516x. Webb saw them as Y and B or Y and G. Secchi called the colors,
"magnifici, superbi".
- 18 -
Zone 181
Scale Model (in which the Sun is a baseball):
Diameter: A = 43.5 inches; B = 8.70 inches.
Separation: AB = 3.70 miles; AC = 89.0 miles.
Distance (LY): 345
Total luminosity (Suns): 152
STF 417 rej
Rating: 4 E
HD 22094; SAO 130569
Position: 0334-0233
A
B
Magnitude
8.69
10.64
Separation PA
—
—
25.5 181 +
Year
—
1991
Spectra
K0
Colors
Y
W
Notes:
1891: 25.7 @ 180. 9 measurements.
Observations:
C11 at 115x.
STF 466
Rating: 4 E
ADS 2838; HD 24445; SAO 130795
Position: 0353-0200
A
B
Magnitude
8.22
10.52
Separation PA
—
—
8.4 +
58 -
Year
—
1991
Spectra
F0 V?
Colors
W
W?
Notes:
1831: 8.1 @ 60. 19 measurements. The stars show similar proper motions.
Observations:
C8 at 104x. Webb saw A as Y.
Scale Model (in which the Sun is a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 5.78 miles.
Distance (LY): 441
Total luminosity (Suns): 9
- 19 -
Zone 181
Bur 543
Rating: 4 E
ADS 2894; HD 24916; SAO 130840
Position: 0357-0109
A
B
Magnitude
8.07
11.32
Separation PA
—
—
11.1 17 -
Year
—
1994
Spectra
K4 V
Colors
Y
O
Notes:
AB 1877: 11.2 @ 32. 28 measurements. A premature orbit has been computed.
A is a flare suspect.
Observations:
C8 at 83x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 1.80 inches.
Separation: AB = 4,665 feet.
Distance (LY): 51
Total luminosity (Suns): 0.07
Bur 1042
Rating: 4 E
ADS 2909; HD 25040; SAO 130858
Position: 0359-0239
A
B
C
D
BC
Magnitude
7.66
10.13
10.96
10.80
Separation PA
—
—
58.1 +
92 39.2 1.1
250 35
Notes:
AB 1888: 54.9 @ 94. 15 measurements.
BC 1 measurement.
AD 1899: 39.3 @ 251. 2 measurements.
Observations:
C8 at 104x.
- 20 -
Year
—
1991
1910
1888
Spectra
G5
Colors
W
B
W
No
Zone 181
Scale Model (in which the Sun is a baseball):
Diameter: A = 19.0 inches.
Separation: AB = 55.3 miles; AD = 37.3 miles; BC = 1.05 miles.
Distance (LY): 610
Total luminosity (Suns): 55
Engelmann 15
Rating: 5 E
HD 24325; SAO 130780
Position: 0352-0109
A
B
Magnitude
6.77
10.19
Separation PA
—
—
96.7 +
154 =
Year
—
1991
Spectra
B9
Colors
bW
W?
Notes:
1886: 95.6 @ 154. 7 measurements.
May be optical because Hipparcos gives different distances (710 and 2,200 light
years). Most of the displacement can be traced to proper motion; the pair is probably
optical.
Observations:
C11 at 115x.
Moderate
Bur 401
Rating: 4 M
ADS 2803; HD 24098; SAO 130762
Position: 0351-0131
A
B
C
Magnitude
6.47
10.71
11.20
Separation
—
4.5 40.6
PA
—
254 289
Notes:
AB 1877: 4.7 @ 255. 16 measurements.
AC 1 measurement.
- 21 -
Year
—
1991
1913
Spectra
F2
Colors
W
?
?
Zone 181
Observations:
C8 at 280x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 5.10 inches.
Separation: AB = 1.03 miles; AC = 9.31 miles.
Distance (LY): 147
Total luminosity (Suns): 4.5
h668
A 1292 (B); ADS 2820; HD 24170; SAO 130767
Rating: 5 M
Position: 0351-0010
A
B
Magnitude
8.36
10.50
Separation PA
—
—
21.4 297 -
Year
—
1917
Spectra
K0 V
Colors
Y
W?
Notes:
1901: 21.4 @ 298. 3 measurements.
Observations:
C11 at 115x.
Scale Model (in which the Sun is a baseball):
Diameter: A = 2.40 inches.
Separation: AB = 3.64 miles.
Distance (LY): 109
Total luminosity (Suns): 0.532
Difficult
STF 408
Rating: 5 D
ADS 2581; HD 21789; SAO 130529
Position: 0331-0417
A
B
Magnitude
8.26
8.48
Separation PA
—
—
1.4 =
321 -
- 22 -
Year
—
1997
Spectra
A3
Colors
W
W
Zone 181
Notes:
1831: 1.4 @ 348. 73 measurements.
Observations:
C8 at 280x. Notched.
Scale Model (in which the Sun is a baseball):
Diameter: A = 7.51 inches.
Separation: AB = 3,854 feet.
Distance (LY): 336
Total luminosity (Suns): 12
- 23 -
Zone 181
Zone 181 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
32 Eri
0354-0257
2E
4
A 2415
0302+0238
3E
1
A 2417
0328+0409
3E
1
STF 422
0337+0035
3E
3
Baillaud 1260
0343+0202
3E
3
STF 468
0353-0150
3E
4
Baillaud 1629
0302+0233
4E
1
Baillaud 2110
0303+0414
4E
1
Schjellerup 2
0325-0110
4E
2
Bur 1180
0328-0434
4E
2
A. G. 69
0333+0409
4E
3
STF 417 rej
0334-0233
4E
4
STF 456 rej
0348+0136
4E
3
STF 466
0353-0200
4E
4
Bur 543
0357-0109
4E
4
Bur 1042
0359-0239
4E
4
Harvard 62
0302+0348
5E
1
Gauchet 2
0302+0005
5E
1
STF 358
0309-0342
5E
2
Kappa 1 Cet
0319+0322
5E
1
Component
A
B
C
A
B
A
B
A
B
A
B
A
B
C
BC
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
C
D
BC
A
B
A
B
A
B
A
B
C
BC
- 24 -
Mag
4.46
5.65
11.6
10.43
10.5
8.69
9.56
5.82
8.8
10.4
10.6
8.98
11.99
10
10.24
10.61
9.48
9.9
8.25
10.11
7.59
9.78
8.13
10.04
10.35
8.69
10.64
9.19
10.09
8.22
10.52
8.07
11.32
7.66
10.13
10.96
10.8
10.75
10.91
9.72
11.07
8.9
11.9
4.83
8.86
11.9
Separation
—
6.9 +
165.3 —
2.7 +
—
72.6 +
—
6=
—
12.0 +
—
21.1 +
PA
—
348 165.3 —
247 +
—
56 =?
—
259 +
—
182 =
—
97 -
1.7 +
—
11.1 —
8.3 —
17.1 =
—
0.4 =
7.0 —
6.6 =
—
25.5 —
22.2 +
—
8.4 +
—
11.1 —
58.1 +
39.2 -
67 —
298 +
—
223 —
183 —
23 7.0 —
354 =
—
181 +
—
121 +
—
58 —
17 —
92 39.2 -
1.1
—
39.2 —
8.0 —
15.3 +
—
266.2 -
35
—
123 +
—
138 —
349 =
—
162 +
215.1
272
Zone 181
Designation
Position
Rating
Map
Baillaud 1259
0335+0146
5E
3
h2205
0346+0325
5E
3
Baillaud 1639
0347+0220
5E
3
Engelmann 15
0352-0109
5E
4
STF 463
0352+0020
5E
3
STF 341
0303-0206
3M
2
h3554
0313-0255
4M
2
Bur 401
0351-0131
4M
4
Bur 400
0311-0349
5M
2
STF 365 rej
0313-0414
5M
2
Hough 320
0321+0110
5M
1
STF 393
0326+0001
5M
2
Baillaud 658
0341+0005
5M
3
h2202
0343+0015
5M
3
h668
0351-0010
5M
4
STF 367
0314+0044
3D
1
95 Cet
0318-0056
4D
2
Bur 528
0308-0336
5D
2
STF 408
0331-0417
5D
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
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
- 25 -
Mag
9.91
11.2
10.3
11.17
9.68
13.41
6.77
10.19
9.82
11.9
7.51
9.85
8.65
11.91
6.47
10.71
11.2
6.05
11.9
10.19
11.1
8.55
10.5
8.68
11.5
10.94
11.13
10.16
12.44
8.36
10.5
8.19
8.9
5.62
7.97
8.77
9.65
12.21
8.26
8.48
Separation
—
7.4 +
—
39.0 +
—
13.6 +
—
96.7 +
—
9.8 —
8.7 +
—
19.5 —
4.5 40.6
—
24.2 —
12.7 =
—
2.1 +
—
15.6 —
17.0 +
—
20.0
—
21.4 —
1.2 +
—
1.2 +
—
0.3 49.4 +
—
1.4 =
PA
—
196 +
—
141 =
—
213 =
—
154 =
—
193 —
223 —
346 —
254 40.6
—
51 —
143 +
—
173 +
—
257 —
271 —
90
—
297 —
137 -!
—
256 +?
—
182 49.4 +
—
321 -