Zone 256, Master Map
Normal View
Zone Master, Normal View, 10 deg FOV
ο2
-24°00'
ο1
Lepus
δ Wezen
ω
e
σ
c
ν1
ε Adhara
ν2
-30°00'
ζ Furud
Aludra
-28°00'
-26°00'
τ
σ
d
-32°00'
Puppis
Canis Major
µ
δ
λ
α Phact
κ
γ
Columba
β Wazn
No Map
θ
ξ
-38°00'
π
g
-34°00'
f
λ
-36°00'
κ
07h 28m 07h 20m 07h 12m
06h 56m 06h 48m 06h 40m
06h 24m 06h 16m
06h 00m
05h 44m 05h 36m 05h 28m
Zone 256, Map 1
Normal Image
South 516
Argelander 12
h3859
-27°00'
-26°00'
LDS 162
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Lepus
NGC 2217
Columba
-28°00'
h3825
Cordoba 36
-29°00'
h3830
Innes 349
Jacob 3
ζ
06h 30m
06h 25m
Furud
Zeta CMa
06h 20m
06h 15m
06h 10m
06h 05m
06h 00m
Zone 256, Map 1
Mirror Image
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
South 516
Argelander 12
-26°00'
LDS 162
-27°00'
h3859
Lepus
NGC 2217
-28°00'
Columba
h3825
Cordoba 36
-29°00'
h3830
Innes 349
Jacob 3
ζ
06h 00m
06h 05m
06h 10m
06h 15m
Furud
Z
06h 20m t CM
06h 25m
06h 30m
Zone 256, Map 2
Normal Image
Furud
Zeta CMa
-31°00'
ζ
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 2243
-32°00'
USNO 4
Bur 753
Canis Major
-33°00'
λ
δ
06h 30m
06h 25m
06h 20m
-34°00'
See 65
κ
06h 15m
06h 10m
06h 05m
06h 00m
Zone 256, Map 2
Mirror Image
Furud
Zeta CMa
NGC 2243
-31°00'
ζ
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-32°00'
USNO 4
Bur 753
λ
-33°00'
Canis Major
δ
06h 00m
06h 05m
06h 10m
06h 15m
κ
06h 20m
06h 25m
-34°00'
See 65
06h 30m
Zone 256, Map 3
Normal Image
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Collinder 121
Cordoba 279
-26°00'
Stone 16
Cordoba 38
Bur 325
-27°00'
Innes 757
-28°00'
NGC 2280
ε
Rousseau 6
-29°00'
h3896
Adhara
Ruprecht 3
Ruprecht 2
07h 00m
06h 55m
06h 50m
06h 45m
06h 40m
h3871
06h 35m
06h 30m
Zone 256, Map 3
Mirror Image
Collinder 121
Cordoba 279
-25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-26°00'
Stone 16
Cordoba 38
Innes 757
-27°00'
Bur 325
-28°00'
NGC 2280
Rousseau 6
ε
Ruprecht 3
Ruprecht 2
h3871
06h 30m
06h 35m
Adhara
06h 40m
06h 45m
06h 50m
06h 55m
07h 00m
-29°00'
h3896
Zone 256, Map 4
Normal Image
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-31°00'
h3891
Harvard 198
10 CMa
H V 108
-32°00'
Voute 21
h3869
Cordoba 43
Bur 753
κ
Columba
-34°00'
Puppis
-33°00'
λ
h3900
07h 00m
06h 55m
06h 50m
06h 45m
06h 40m
06h 35m
06h 30m
Zone 256, Map 4
Mirror Image
h3891
Harvard 198
10 CMa
-31°00'
-30°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 2243
H V 108
-32°00'
Voute 21
h3869
Cordoba 43
Bur 753
κ
-33°00'
λ
-34°00'
Puppis
Columba
h3900
06h 30m
06h 35m
06h 40m
06h 45m
06h 50m
06h 55m
07h 00m
Zone 256, Map 5
Normal Image
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-36°00'
h3905
-37°00'
NGC 2298
-39°00'
-38°00'
h3893
07h 00m
06h 55m
06h 50m
06h 45m
06h 40m
06h 35m
06h 30m
Zone 256, Map 5
Mirror Image
-35°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-36°00'
h3905
-37°00'
NGC 2298
-39°00'
-38°00'
h3893
06h 30m
06h 35m
06h 40m
06h 45m
06h 50m
06h 55m
07h 00m
Zone 256
31 Double Stars, 3 Open Clusters,
1 Globular Cluster, 2 Galaxies
Flamsteed
I
10 CMa...................................................... 20
Innes 349..................................................... 5
Innes 757................................................... 13
A
J
Argelander 12.............................................. 5
Jacob 3 ........................................................ 3
B
Bur 325...................................................... 14
Bur 753........................................................ 9
L
C
N
Cordoba 279.............................................. 12
Cordoba 36.................................................. 2
Cordoba 38................................................ 13
Cordoba 43................................................ 18
NGC 2217 ................................................... 6
NGC 2243 ................................................. 10
NGC 2280 ................................................. 16
E
Rousseau 6 ................................................ 12
Ruprecht 2................................................. 16
Ruprecht 3................................................. 17
LDS 162 ...................................................... 4
R
Epsilon CMa ............................................. 15
H
S
H V 108..................................................... 18
h3825........................................................... 3
h3830........................................................... 2
h3859........................................................... 4
h3869......................................................... 17
h3871......................................................... 11
h3891......................................................... 21
h3893......................................................... 22
h3896......................................................... 11
h3900......................................................... 20
h3905......................................................... 22
Harvard 198 .............................................. 19
See 65.......................................................... 8
Stone 16 .................................................... 14
U
USNO 4....................................................... 7
V
Voute 21.................................................... 19
Z
Zeta CMa .................................................... 7
-1-
Zone 256
Zone 256, Map 1
Double Stars
Easy
Cordoba 36
Innes 753; ADS 5037
Rating: 2 E
Position: 0624-2802
A
B
Magnitude
8.44
9.26
Separation PA
—
—
9.0 242 -
Year
—
1991
Spectra
Colors
pO
pB
Notes:
1879: 9.4 @ 243. 10 measurements. May be optical because Hipparcos gives
different distances (163 and 305 light years).
Observations:
C8 at 104x.
h3830
Rating: 3 E
ADS 4682; HD 41683
Position: 0605-2841
A
B
Magnitude
7.58
8.60
Separation PA
—
—
6.3 +
3+
Year
—
1991
Notes:
1836: 6.0 @ 2. 25 measurements.
Observations:
C8 at 206x.
-2-
Spectra
F2
Colors
W
W
Zone 256
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.4 inches.
Separation: AB = 3.11 miles.
Distance (LY): 317
Total luminosity (Suns): 10
Jacob 3
Rating: 3 E
ADS 4967; HD 44401; SAO 171597
Position: 0620-2937
A
B
Magnitude
7.97
9.35
Separation PA
—
—
13.1 +
208 +
Year
—
1991
Spectra
K0 III
K0
Colors
O
Y
Notes:
1846: 12.7 @ 206. 11 measurements.
The stars show similar proper motions.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches; B = 26.3 inches.
Separation: AB = 7.58 miles.
Distance (LY): 371
Total luminosity (Suns): 9
h3825
Rating: 4 E
HD 41172; SAO 171158
Position: 0602-2726
A
B
Magnitude
7.18
10.36
Separation PA
—
—
32.7 +
338 -
Notes:
1835: 25.0 @ 343. 2 measurements.
-3-
Year
—
1920
Spectra
F3 V
Colors
W
B
Zone 256
Hipparcos/Tycho mission data show different distances for these stars (182 and 82
light years); they may be optical.
Observations:
C8 at 83x.
h3859
Rating: 4 E
SAO 171748
Position: 0626-2649
A
B
Magnitude
9.44
9.69
Separation PA
—
—
10.5 265 +
Year
—
1991
Spectra
K2
Colors
Y
yW
Notes:
1835: 15.0 @ 253. 10 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 29.1 inches.
Separation: AB = 8.19 miles.
Distance (LY): 500
Total luminosity (Suns): 6
LDS 162
Rating: 5 E
HD 45588; SAO 171774
Position: 0627-2551
A
B
Magnitude
6.05
11.04
Separation PA
—
—
39.0 43 -
Year
—
1990
Spectra
F8 V
Colors
yW
?
Notes:
1960: 42.0 @ 45. 2 measurements.
Hipparcos/Tycho mission data show different distances for these stars (97 and 14 light
years); they may be optical.
-4-
Zone 256
Observations:
C8 at 104x. Rich field.
Moderate
Argelander 12
Rating: 3 M
ADS 4676
Position: 0605-2501
A
B
Magnitude
7.71
7.75
Separation PA
—
—
4.6 =
296 -
Year
—
1991
Spectra
A0 V
Colors
W
W
Notes:
1876: 4.6 @ 297. 27 measurements.
Observations:
C8 at 83x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 1.00 mile.
Distance (LY): 135
Total luminosity (Suns): 1.66
Innes 349
Rating: 5 M
ADS 4858; HD 43369; SAO 171448
Position: 0614-2937
A
B
Magnitude
6.98
10.80
Separation PA
—
—
6.3 +
42 -
Notes:
1901: 6.2 @ 44. 4 measurements.
-5-
Year
—
1965
Spectra
A0 IV
Colors
W
?
Zone 256
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 5.30 miles.
Distance (LY): 540
Total luminosity (Suns): 41
Deep Sky Objects
Moderate
NGC 2217
Other Names: PGC 18883
Rating: 5 M
Position: 0622-2714
Type: Gal
Surface brightness: 13.4
Class: (R)SB(rs)0/a
Dimensions: 4' x 3'
Magnitude: 12.0
PA: 104
Observations:
C8 at 65x. It is small and elongated, with a prominent nucleus.
Steve Coe's C11 at 140x in Stentinel, Arizona. 4 min diameter, 11 stars, slightly
elongated. Very small, much brighter middle, stellar nucleus. Framed by two 13m stars.
Model (where the Sun is a baseball):
Its diameter would be 25 million miles.
Distance (LY): 67,000,000
Radial velocity (km/sec): +1,619
Luminosity (suns): 6,000,000,000
-6-
Zone 256
Zone 256, Map 2
Double Stars
Easy
Zeta CMa
Rating: 4 E
1 CMa; Furud, "the bright single one"; Smythe 1; HD 44402; SAO 196698
Position: 0620-3004
A
B
Magnitude
3.02
7.70
Separation PA
—
—
175.7 +
338 =
Year
—
1950
Spectra
B2 V
Colors
bW
B
Notes:
1833: 167.0 @ 338. 3 measurements. Star A is a long-period spectroscopic binary
(675 day period). It is also a member of the Pleiades group.
Observations:
C8 at 83x. Some observers report yW for the companion.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.2 inches.
Separation: AB = 92.1 miles; Aa = 40.4 feet.
Distance (LY): 336
Total luminosity (Suns): 577
USNO 4
Rating: 4 E
HD 45305
Position: 0625-3134
A
B
Magnitude
8.60
9.80
Separation PA
—
—
7.9 +
352 +
Notes:
1876: 7.7 @ 351. 7 measurements.
-7-
Year
—
1965
Spectra
F2
Colors
bW
W
Zone 256
Observations:
C8 at 104x. A 9.4m star is 7 min NE. A nice chain of five 9m stars lies 20 min S.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.1 inches.
Separation: AB = 66.6 miles.
Distance (LY): 5,400
Total luminosity (Suns): 1,100
Moderate
See 65
Rating: 5 M
HD 44843; SAO 196744
Position: 0622-3352
A
B
Magnitude
7.91
11.90
Separation PA
—
—
17.5 109 =
Year
—
1933
Notes:
1897: 17.8 @ 109. 3 measurements.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 32.4 inches.
Separation: AB = 81.9 miles.
Distance (LY): 3,000
Total luminosity (Suns): 512
-8-
Spectra
G0 III
Colors
yW
?
Zone 256
Difficult
Bur 753
Rating: 5 D
HD 45871; SAO 196861
Position: 0629-3222
A
B
Magnitude
5.74
7.65
Separation PA
—
—
1.2 =
43 +
Year
—
1999
Notes:
AB 1879: 1.2 @ 40. 18 measurements.
This star is slightly variable and is a shell star.
The proper motion is small.
Observations:
C8 at 697x. Notched.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.0 inches.
Separation: AB = 1.53 miles.
Distance (LY): 820
Total luminosity (Suns): 267
-9-
Spectra
B3 IVep
Colors
Y
O
Zone 256
Deep Sky Objects
Moderate
NGC 2243
Other Names: Melotte 46; Collinder 98; Raab 36
Rating: 4 M
Position: 0630-3117
Type: Oc
Dimensions: 5'
Class: I 2r
Cluster population: 100
Magnitude: 9.4
Notes:
It is 23 light years in diameter and 6 billion years old. At least 368 stars belong to this
group. The brightest star is 11.8m (350 times brighter than the Sun).
It lies 36,000 light years from the galactic center.
Observations:
C8 at 104x. It is a nebulous patch with 9 stars resolved inside a sharp triangle. The
7m star towards the N edge is SAO 196879.
Model (where the Sun is a baseball):
Its diameter would be 7,020 miles with stars 760 miles apart.
Distance (LY): 15,000
Luminosity (suns): 3,100
- 10 -
Zone 256
Zone 256, Map 3
Double Stars
Easy
h3871
Rating: 2 E
ADS 5214; HD 46813; SAO 171963
Position: 0634-2938
A
B
Magnitude
6.82
8.20
Separation PA
—
—
7.7 354 +
Year
—
1992
Spectra
A2 V
Colors
Y
O
Notes:
1837: 10.0 @ 353. 18 measurements.
Observations:
C8 at 83x. It is very nice at low powers. It is the NE vertex of a triangle with 8.2m
SAO 171949 (8’ W) and 7.9m SAO 171939 (14’ SW).
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 4.91 miles.
Distance (LY): 409
Total luminosity (Suns): 32
h3896
Rating: 3 E
ADS 5527; HD 50234; SAO 172438
Position: 0651-2844
A
B
Magnitude
9.16
9.16
Separation PA
—
—
11.3 344 +?
Year
—
1991
Notes:
1836: 11.5 @ 162. 11 measurements. Quadrant reversal?
- 11 -
Spectra
F0 V
Colors
yW
pO
Zone 256
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.70 inches.
Separation: AB = 3.49 miles.
Distance (LY): 198
Total luminosity (Suns): 1.4
Rousseau 6
Rating: 4 E
HD 49488; SAO 172332
Position: 0648-2834
A
B
Magnitude
7.84
8.50
Separation PA
—
—
54.8 167 =
Year
—
1991
Spectra
B3 IV
Colors
bW
W
Notes:
1899: 55.0 @ 167. 8 measurements. May be optical because Hipparcos gives
different distances (3,360 and 790 light years).
This previously uncataloged double star was a Hipparcos double entry system.
Observations:
C11 at 115x.
Cordoba 279
Rating: 4 E
HD 51632; SAO 172626
Position: 0657-2509
A
B
Magnitude
8.24
10.49
Separation PA
—
—
10.0
247
Year
—
1999
Spectra
K3 III
Colors
yO
W
Notes:
1 measurement.
May be optical because Hipparcos gives different distances (760 and 326 light years).
The Tycho-2 Catalogue indicates a single star entry.
- 12 -
Zone 256
Observations:
C11 at 115x.
Cordoba 38
Rating: 5 E
ADS 5254; HD 47185; SAO 172014
Position: 0636-2607
A
B
Magnitude
7.95
10.05
Separation PA
—
—
11.4 +
303 +
Year
—
1991
Spectra
K1 III
Colors
O
W
Notes:
AB 1909: 8 @ 300. 5 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 2.40 inches.
Separation: AB = 11.4 miles.
Distance (LY): 640
Total luminosity (Suns): 23
Moderate
Innes 757
Knipe 1 (C); ADS 5310
Rating: 4 M
Position: 0639-2634
A
B
C
Magnitude
9.21
9.29
11.58
Separation
—
2.0 +
13.5 +
PA
—
203 -?
120 +
Year
—
1991
1991
Notes:
AB 1913: 1.6 @ 41. 12 measurements. Quadrant reversal?
AC 1911: 10.8 @ 111. 5 measurements.
- 13 -
Spectra
K1 V
Colors
Y
W
W?
Zone 256
Observations:
C11 at 193x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 2.25 inches.
Separation: AB = 2,587 feet; AC = 3.34 miles.
Distance (LY): 159
Total luminosity (Suns): 0.835
Stone 16
Rating: 5 M
ADS 5606; HD 51343; SAO 172591
Position: 0656-2531
A
B
Magnitude
7.18
10.13
Separation PA
—
—
3.5 96 -
Year
—
1991
Spectra
F3 V
Colors
W
?
Notes:
1876: 3.6 @ 99. 8 measurements.
Observations:
C8 at 206x. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.80 inches.
Separation: AB = 1.37 miles.
Distance (LY): 251
Total luminosity (Suns): 5.7
Difficult
Bur 325
Rating: 4 D
ADS 5539; HD 50379; SAO 172461
Position: 0652-2635
A
B
Magnitude
7.59
9.00
Separation PA
—
—
1.7 +
38 +
- 14 -
Year
—
1991
Spectra
B5 V
Colors
W
W
Zone 256
Notes:
AB 1875: 1.6 @ 20. 15 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.4 inches.
Separation: AB = 2.99 miles.
Distance (LY): 1,130
Total luminosity (Suns): 125
Epsilon CMa
Rating: 5 D
21 CMa; Adhara, "the virgins"; Capetown Obs 7; ADS 5654; HD 52089; SAO 172676
Astronomical League Program: Double Star Club
Position: 0659-2858
A
B
Magnitude
1.50
7.50
Separation PA
—
—
7.5 161 =
Year
—
1951
Spectra
B2 II
Colors
W
?
Notes:
1850: 7.7 @ 161. 20 measurements.
Very small proper motion. The true separation of these two stars must be at least
1,200 AU. The primary is an infra-red source and is a member of the Pleiades Group. Its
diameter has been measured by intereferometer to be 0.00078".
From James Kaler's Star Notes:
Adhara is quite the magnificent star. One of the hottest of all the bright stars, Adhara
shines with a surface temperature of some 20,000 degrees Kelvin, which gives it a
sparkling bluish cast. If at the distance of Sirius, which dominates Canis Major, Adhara
would shine at apparent magnitude -7, 15 times brighter than Venus at its most luminous.
Because of the star's high temperature it radiates a good portion of its energy in the
invisible ultraviolet. If that is taken into account, Adhara is actually 15,000 times more
luminous than the Sun! The star, having ceased hydrogen fusion in its core, is actually in
the beginning of its death stages, and is now in its "giant" state. It is very popular among
those who study local interstellar matter, as its spectrum is used to examine the stuff that
lies between it and the Sun.
- 15 -
Zone 256
Observations:
C8 at 280x. A diffraction mask is a big help here. Very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 33 inches.
Separation: AB = 5.04 miles.
Distance (LY): 431
Total luminosity (Suns): 3,776
Deep Sky Objects
Moderate
Ruprecht 2
Position: 0641-2936
Type: Oc
Dimensions: 7'
Rating: 4 M
Class: IV 3p
Cluster population: 10
Magnitude: 12.0
Notes:
The brightest star is 12m.
Observations:
C8 at 47x. This is a poor, small group with a pronounced "W" shape.
NGC 2280
Other Names: PGC 19531
Rating: 5 M
Position: 0645-2738
Type: Gal
Surface brightness: 13.5
Class: SA(s)cd
Dimensions: 2' x 1'
Notes:
This galaxy produced supernova 2001FZ (type II).
- 16 -
Magnitude: 12.7
PA: 163
Zone 256
Observations:
C8 at 83x. Faint, it has a slightly brighter nucleus, and is the SE vertex of a right
triangle with a 7m star and a 6m star.
Distance (LY): 72,000,000
Radial velocity (km/sec): +1,906
Total luminosity (Suns): 3,400,000,000
Difficult
Ruprecht 3
Position: 0642-2927
Rating: 5 D
Type: Oc
Dimensions: 3'
Class: II 1p
Cluster population: 15
Magnitude: 11.0
Notes:
The brightest star is 11m.
Observations:
C8 at 206x. Very faint and oblong. Only six stars were resolved, the rest giving it a
grainy look.
Zone 256, Map 4
Double Stars
Easy
h3869
Rating: 2 E
HD 46547; SAO 196919
Position: 0633-3202
A
B
Magnitude
6.19
8.67
Separation PA
—
—
24.6 258 +
- 17 -
Year
—
1991
Spectra
B3 IV
A0
Colors
W
dB!
Zone 256
Notes:
1836: 27.5 @ 250. 17 measurements.
The stars share a small common proper motion although Hipparcos gives different
distances (840 and 323 light years).
Observations:
C8 at 83x.
H V 108
Rating: 2 E
HD 50123; SAO 197263; H V 108
Position: 0650-3143
A
B
Magnitude
5.74
7.79
Separation PA
—
—
42.7 66 -
Year
—
1991
Spectra
B8 Ve
A3 V
Colors
Y!
B!
Notes:
1783: 42.9 @ 67. 14 measurements.
B has variable radial velocity.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.2 inches; B = 8.10 inches.
Separation: AB = 15.2 miles.
Distance (LY): 228
Total luminosity (Suns): 24.7
Cordoba 43
Rating: 4 E
HD 48891
Position: 0644-3219
A
B
Magnitude
8.88
9.84
Separation PA
—
—
4.8 +
265 +
- 18 -
Year
—
1992
Spectra
A0 V
Colors
W
W
Zone 256
Notes:
AB 1898: 4.6 @ 240. 10 measurements.
Observations:
C8 at 104x. Two other very faint stars (10m, 11m) form a triangle with it.
Harvard 198
Rating: 4 E
HD 52140; SAO 197432
Position: 0659-3100
A
B
C
Magnitude
6.41
10.05
11.24
Separation
—
40.2 +!!
70.0
PA
—
337 +
320
Year
—
1977
Spectra
B3 V
Colors
W
B
?
Notes:
AB 1900: 15.0 @ 315. 4 measurements. The stars have a small difference in proper
motion and Hipparcos gives different distances (770 and 109 light years).
AC 1 measurement.
Observations:
C8 at 83x. It forms the SE vertex of a triangle with 7.1m SAO 197415 (17’ NW) and
8.6m SAO 197416 (8’ SW).
Voute 21
Rating: 5 E
HD 47851; SAO 197044
Position: 0639-3150
A
B
Magnitude
7.69
9.67
Separation PA
—
—
23.9 28 -
Year
—
1991
Spectra
B2 V
Colors
bW
?
Notes:
1911: 24.1 @ 30. 8 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical.
There is a 10.9m companion to B at 0.5 @ 148 (1991).
Observations:
C8 at 83x. Odd— it is cupped by a half-heart shaped line of nine 9m stars to the W.
- 19 -
Zone 256
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.2 inches.
Separation: AB = 101 miles.
Distance (LY): 2,700
Total luminosity (Suns): 553
Moderate
h3900
Rating: 3 M
HD 51042; SAO 197334
Position: 0654-3413
A
B
Magnitude
7.33
9.00
Separation PA
—
—
2.2 +
278 +
Year
—
1991
Spectra
A0 IV
Colors
W
W
Notes:
1838: 2.0 @ 255. 13 measurements.
Observations:
C8 at 280x. Notched.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 2.47 miles.
Distance (LY): 720
Total luminosity (Suns): 60
10 CMa
Harvard 197; A = FT CMa; HD 48917; SAO 197149
Rating: 5 M
Position: 0645-3104
A
B
Magnitude
5.20
10.60
Separation PA
—
—
36
97
Year
—
1901
Observations:
C8 at 206x. Note the quaint row of three 10m stars 5 min NE.
- 20 -
Spectra
B2 V
Colors
W
?
Zone 256
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.2 inches.
Separation: AB = 146 miles.
Distance (LY): 2,600
Total luminosity (Suns): 4,531
Difficult
h3891
HP CMa; HD 49131; SAO 197176
Rating: 4 D
Position: 0646-3057
A
B
Magnitude
5.62
8.24
Separation PA
—
—
5.0 =
223 +
Year
—
1991
Spectra
B3 V
Colors
Y
R?
Notes:
1838: 5.0 @ 222. 19 measurements. The primary is a spectroscopic binary.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.6 inches.
Separation: AB = 12.5 miles.
Distance (LY): 1,600
Total luminosity (Suns): 1,289
- 21 -
Zone 256
Zone 256, Map 5
Double Stars
Easy
h3893
Rating: 4 E
HD 49591; SAO 197215
Position: 0647-3756
A
B
Magnitude
5.27
11.14
Separation PA
—
—
65.4 +
299 +
Year
—
1920
Spectra
B9 IV
Colors
W
W
Notes:
1835: 60.0 @ 285. 2 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 33.8 miles.
Distance (LY): 331
Total luminosity (Suns): 66.31
Moderate
h3905
Innes 66 (B); SAO 197422
Rating: 4 M
Position: 0658-3525
A
B
C
Magnitude
7.57
9.80
7.62
Separation
—
1.9 14.7 -
PA
—
253 270 +
- 22 -
Year
—
1991
1991
Spectra
B9
Colors
W
?
B
Zone 256
Notes:
AB 1896: 2.0 @ 255. 8 measurements.
AC 1835: 15.0 @ 268. 8 measurements.
Observations:
C8 at 104x. It forms the E vertex of a triangle with stars of 6.3m and 6.3m.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.89 inches.
Separation: AB = 8.00 miles; AC = 61.9 miles.
Distance (LY): 2,700
Total luminosity (Suns): 660
- 23 -
Zone 256
Zone 256 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
Cordoba 36
0624-2802
2E
1
h3869
0633-3202
2E
4
h3871
0634-2938
2E
3
H V 108
0650-3143
2E
4
h3830
0605-2841
3E
1
Jacob 3
0620-2937
3E
1
h3896
0651-2844
3E
3
h3825
0602-2726
4E
1
Zeta CMa
0620-3004
4E
2
USNO 4
0625-3134
4E
2
h3859
0626-2649
4E
1
Cordoba 43
0644-3219
4E
4
h3893
0647-3756
4E
5
Rousseau 6
0648-2834
4E
3
Cordoba 279
0657-2509
4E
3
Harvard 198
0659-3100
4E
4
LDS 162
0627-2551
5E
1
Cordoba 38
0636-2607
5E
3
Voute 21
0639-3150
5E
4
Argelander 12
0605-2501
3M
1
h3900
0654-3413
3M
4
Innes 757
0639-2634
4M
3
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
A
B
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
C
- 24 -
Mag
8.44
9.26
6.19
8.67
6.82
8.20
5.74
7.79
7.58
8.60
7.97
9.35
9.16
9.16
7.18
10.36
3.02
7.70
8.60
9.80
9.44
9.69
8.88
9.84
5.27
11.14
7.84
8.50
8.24
10.49
6.41
10.05
11.24
6.05
11.04
7.95
10.05
7.69
9.67
7.71
7.75
7.33
9.00
9.21
9.29
11.58
Separation
—
9.0 —
24.6 —
7.7 —
42.7 —
6.3 +
—
13.1 +
—
11.3 —
32.7 +
—
175.7 +
—
7.9 +
—
10.5 —
4.8 +
—
65.4 +
—
54.8 —
10.0
—
40.2 +!!
70.0
—
39.0 —
11.4 +
—
23.9 —
4.6 =
—
2.2 +
—
2.0 +
13.5 +
PA
—
242 —
258 +
—
354 +
—
66 —
3+
—
208 +
—
344 +?
—
338 —
338 =
—
352 +
—
265 +
—
265 +
—
299 +
—
167 =
—
247
—
337 +
70.0
—
43 —
303 +
—
28 —
296 —
278 +
—
203 -?
13.5 +
Zone 256
Designation
Position
Rating
Map
h3905
0658-3525
4M
5
Innes 349
0614-2937
5M
1
See 65
0622-3352
5M
2
10 CMa
0645-3104
5M
4
Stone 16
0656-2531
5M
3
h3891
0646-3057
4D
4
Bur 325
0652-2635
4D
3
Bur 753
0629-3222
5D
2
Epsilon CMa
0659-2858
5D
3
Component
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
Mag
7.57
9.80
7.62
6.98
10.80
7.91
11.90
5.20
10.60
7.18
10.13
5.62
8.24
7.59
9.00
5.74
7.65
1.50
7.50
Separation
—
1.9 14.7 —
6.3 +
—
17.5 —
36
—
3.5 —
5.0 =
—
1.7 +
—
1.2 =
—
7.5 -
PA
—
253 14.7 —
42 —
109 =
—
97
—
96 —
223 +
—
38 +
—
43 +
—
161 =
Deep Space Objects
Object
NGC 2243
Ruprecht 2
NGC 2217
NGC 2280
Ruprecht 3
Position
0630-3117
0641-2936
0622-2714
0645-2738
0642-2927
Rating
4M
4M
5M
5M
5D
Map
2
3
1
3
3
Type
Oc (I 2r)
Oc (IV 3p)
Gal ((R)SB(rs)0/a)
Gal (SA(s)cd)
Oc (II 1p)
- 25 -
Specifications
Surface
Mag
Br
9.4
12.0
12.0
13.4
12.7
13.5
11.0
Population
100
10
15