Zone 232, Master Map
µ
η
-14°00'
Normal View
Zone Master, Normal View, 10 deg FOV
θ
α
-16°00'
γ
Sirius
ι
β Mirzam
ν3
c
-18°00'
e
ν1
-20°00'
ν2
-22°00'
π
Canis Major
f
d
ξ2
ο2
07h 04m
-24°00'
ξ1
ο1
06h 56m
06h 48m
06h 40m
06h 32m
06h 24m
06h 16m
06h 08m
06h 00m
Zone 232, Map 1
Normal Image
-15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
θ
-16°00'
h3864
South 518
h3865
-18°00'
-17°00'
South 517
A 3027
Mirzamβ
Beta CMa
-19°00'
NGC 2204
Hough 339
06h 30m
06h 25m
06h 20m
06h 15m
06h 10m
06h 05m
06h 00m
Zone 232, Map 1
Mirror Image
θ
South 518
-16°00'
-15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
β
Mirzam
Beta CMa
-18°00'
-17°00'
South 517
A 3027
-19°00'
NGC 2204
Hough 339
06h 00m
06h 05m
06h 10m
06h 15m
06h 20m
06h 25m
06h 30m
Zone 232, Map 2
Normal Image
h3821
-21°00'
-20°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 2207
h3842
CPD 1
h3863
-22°00'
NGC 2196
h3845
h3835
-23°00'
NGC 2223
h3833
-24°00'
NGC 2139
South 516
06h 30m
06h 25m
06h 20m
Argelander 12
06h 15m
06h 10m
06h 05m
06h 00m
Zone 232, Map 2
Mirror Image
-21°00'
-20°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
h3821
NGC 2207
h3842
-22°00'
NGC 2196
CPD 1
h3845
h3835
-23°00'
NGC 2223
h3833
-24°00'
NGC 2139
South 516
Argelander 12
06h 00m
06h 05m
06h 10m
06h 15m
06h 20m
06h 25m
06h 30m
Zone 232, Map 3
Normal Image
-15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 972 rej
Gallo 414
Bur 19
Bur 898
Bur 20
Howe 13
-16°00'
AC 4
Barnard 31
Sirius
Alpha CMa
-17°00'
α
NGC 2283
-18°00'
ι
ν3
h3902
ν1
Nu 1 CMa
Aravamudan 346
ν2
-19°00'
Argelander 16
Innes 761
07h 00m
π Pi CMa
06h 55m
06h 50m
06h 45m
06h 40m
06h 35m
06h 30m
Zone 232, Map 3
Mirror Image
Gallo 414
AC 4
STF 972 rej
Bur 19
Howe 13
-16°00'
h3864
-15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Bur 898
Bur 20
Barnard 31
Sirius
Alpha CMa
-17°00'
α
-18°00'
ι
NGC 2283
ν3
h3902
Argelander 16
-19°00'
ν1 Nu 1 CMa
Aravamudan 346
ν2
Innes 761
06h 30m
06h 35m
06h 40m
06h 45m
06h 50m
π
06h 55m
Pi CMa
07h 00m
Zone 232, Map 4
Normal Image
Pi CMa
17 CMa
Howe 15
Howe 16
NGC 2287
h2321
h2341
-21°00'
π
-20°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Bos 2125
-22°00'
Hipparcos 964
See 74
South 543
South 534
h3876
South 541
h3877
-23°00'
Aravamudan 1666
ξ2
Bur 195
ξ1 Xi CMa
South 537
ο1
-24°00'
Bos 117
Argelander 15
South 538
Bos 122
Collinder 121
07h 00m
Cordoba 279
06h 55m
06h 50m
06h 45m
06h 40m
06h 35m
06h 30m
Zone 232, Map 4
Mirror Image
π
17 CMa
Howe 15
Howe 16
NGC 2287
h2341
Pi CMa
-21°00'
h2321
-20°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Bos 2125
-22°00'
Hipparcos 964
ξ2
South 541
-23°00'
h3863
Aravamudan 1666
South 534
h3876
h3877
Bur 195
ξ1
Xi CMa
South 537
Argelander 15
-24°00'
Bos 117
South 538 ο1
Bos 122
Collinder 121
06h 30m
06h 35m
06h 40m
06h 45m
06h 50m
06h 55m
Cordoba 279
07h 00m
Zone 232
1 Reference Star, 47 Double Stars,
3 Open Clusters, 13 Galaxies
Flamsteed
h2341 ................................................... 29
h3821 ..................................................... 9
17 CMa ................................................ 27
A
h3833 ................................................... 11
h3835 ................................................... 11
h3842 ................................................... 12
h3845 ................................................... 12
h3863 ................................................... 10
h3865 ..................................................... 4
h3876 ................................................... 26
h3877 ................................................... 31
h3902 ................................................... 19
Hipparcos 964 ...................................... 33
Hough 339.............................................. 7
Howe 13............................................... 18
Howe 15............................................... 32
Howe 16............................................... 30
A 3027 ................................................... 4
AC 4..................................................... 23
Alpha CMa .......................................... 21
Aravamudan 1666................................ 29
Aravamudan 346.................................. 18
Argelander 15 ...................................... 28
Argelander 16 ...................................... 17
B
Barnard 31 ........................................... 20
Beta CMa............................................... 5
Bos 117 ................................................ 34
Bos 122 ................................................ 34
Bos 2125 .............................................. 31
Bur 19 .................................................. 20
Bur 195 ................................................ 33
Bur 20 .................................................. 21
Bur 898 ................................................ 23
I
Innes 761.............................................. 16
N
NGC 2139 ............................................ 14
NGC 2196 ............................................ 15
NGC 2204 .............................................. 7
NGC 2207 ............................................ 13
NGC 2223 ............................................ 15
NGC 2283 ............................................ 24
NGC 2287 ............................................ 35
Nu 1 CMa............................................. 16
C
Collinder 121 ....................................... 36
CPD 1 .................................................. 13
G
Gallo 414 ............................................. 19
H
h2321 ................................................... 25
-1-
Zone 232
South 537 ............................................. 26
South 538 ............................................. 27
South 541 ............................................. 30
STF 972 rej .......................................... 17
P
Pi CMa................................................. 32
S
South 516............................................... 9
South 517............................................... 3
South 518............................................... 3
South 534............................................. 28
X
Xi CMa ................................................ 25
-2-
Zone 232
Zone 232, Map 1
Double Stars
Easy
South 518
Rating: 2 E
ADS 5034; HD 45016; SAO 151462
Position: 0624-1614
A
B
Magnitude
6.95
8.63
Separation PA
—
—
16.4 87 =
Year
—
1991
Spectra
A9 V
A
Colors
W
B
Notes:
1825: 16.5 @ 87. 15 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical.
Observations:
C8 at 83x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.30 inches; B = 8.45 inches.
Separation: AB = 22.8 miles.
Distance (LY): 890
Total luminosity (Suns): 123
South 517
Rating: 3 E
ADS 4992; SAO 151421
Position: 0622-1637
A
B
C
BC
Magnitude
8.63
5.69
13.80
Separation PA
—
—
22.8 =
192 =
2.3 +
251 +
-3-
Year
—
1919
1972
Spectra
A5
Colors
W
W
No
Zone 232
Notes:
AB 1825: 22.8 @ 192. 8 measurements.
BC 1906: 2.0 @ 247. 3 measurements.
Observations:
C8 at 104x. Two bright stars lie to the S and W.
A 3027
Rating: 4 E
ADS 4995; HD 44682; SAO 151425
Position: 0622-1644
A
B
Magnitude
7.97
10.67
Separation PA
—
—
87.6 +
257 =
Year
—
1991
Spectra
G5
Colors
Y
W
Notes:
1905: 87.3 @ 257. 5 measurements. May be optical because Hipparcos gives
different distances (1,300 and 31 light years).
A has an 11.60m companion at 1.2 @ 222 (1991).
B has an 11.0m companion at 1.4 @ 244 (1983).
Observations:
C8 at 104x. This pair is the SE corner of a rectangle of 8m stars.
h3865
Rating: 4 E
HD 45889; SAO 151559
Position: 0629-1749
A
B
Magnitude
8.06
10.22
Separation PA
—
—
23.3 67 +
Year
—
1983
Spectra
A0 V
Colors
yW
V
Notes:
1898: 23.5 @ 66. 5 measurements.
Hipparcos/Tycho mission data show different distances for these stars (1,320 and 26
light years); they may be optical.
-4-
Zone 232
Observations:
C8 at 83x.
Beta CMa
Rating: 5 E
2 CMa; Murzim, "the announcer" of Sirius' rising; Bpm 88; HD 44743; SAO 151428
Position: 0623-1758
A
B
Magnitude
1.98
10.68
Separation PA
—
—
188.5 +
340 +
Year
—
1988
Spectra
B1 II
Colors
bW!
W
Notes:
1879: 185.0 @ 339. 4 measurements.
The primary is an infra-red source.
This star is a pulsating giant that has given rise to a whole class of rare stars known as
Beta Canis Majoris variables. (These stars are all B-types of very high luminosity and
short variable periods with small amplitudes in their light curves. In fact, Otto Struve
called them "quasi-Cepheids" and since the first such star discovered was Beta Cep, they
are often known now as Beta Cephei types.) Its period is only 6 hours with a change of
only 0.03 in magnitude (Stebbins, 1928). In 1918, it was discovered that besides the 6
hour period, there is a second period of 6 hours, 2 minutes. The two periods are in phase
once very 49 days.
Otto Struve’s study of this star lead him to suggest a mass of 10 solar masses and a
diameter of 10 solar diameters for Beta.
Most of the known Beta CMa type stars are known to be members of hot OB
associations, suggesting they are young, massive stars which are already beginning to
evolve off the Main Sequence. Beta is a spectroscopic binary too, and has had its
diameter measured by interferometer. The result is 0.00050" to 0.00052".
The Beta CMa stars are normally B-type giants with short period variations (in both
magnitude and spectral lines). They are pulsating stars with periods in the range of 3 to 7
hours and magnitude amplitudes of 0.01 to 0.25m (but greater changes occur in the ultraviolet spectrum). On the H-R Diagram, they are located just above the Main Sequence at
B3.
Stellar associations are loose groups of young stars that have similar spectral types,
similar chemistry, and probably formed at about the same time and same place. They are
located in the spiral arms of the Galaxy and about 70 are currently known. They range in
size from a few parsecs in diameter to several hundred parsecs. Because the members are
so spread out, they tend to break up in just a few million years (less than 5% of a
"galactic year").
-5-
Zone 232
There are at least 3 major types of association. The most common type is the OB
association (of which Beta CMa is a member). OB associations often have open clusters
at or near their centers. (The Zeta Persei association is centered on the Double Cluster, h
and Chi Persei, for instance.)
R associations are a little smaller than OB associations (numbering 10 or fewer stars)
that illuminate the reflection nebulae that gave them birth.
T associations are made up of T Tauri stars, young stars of solar mass or slightly
larger that are still approaching the Main Sequence. T associations typically contain 30
or fewer members, but some have as many as 400 stars in them.
Both the R and T associations are found near open clusters.Commonly also seen
spelled "Murzim," Mirzam is the Beta star of Canis Major, the Larger Dog, the greater of
Orion's canine companions. Around 1600, Johannes Bayer gave Greek letter names to the
brighter stars, more or less in order of brightness but with many exceptions, some
constellations first broken into sections. The Alpha (Sirius), Beta, and Gamma stars of
Canis Major, for example, are all in the Dog's head and foreparts, yet Mirzam ranks
fourth in brightness and Gamma (Mulephein), a fourth magnitude star, a distant eighth.
Delta, Epsilon (first magnitude Adhara), and Zeta are lower down, marking the Dog's
hindquarters and rear legs. Mirzam's name, something of a mystery, suggests that the star
is an "announcer" of brilliant Sirius, as Mirzam rises first, but no one seems to know the
exact meaning of the term. Though appearing relatively dim compared to Sirius, Mirzam
is by far the greater of the two, its mid-second magnitude status the result of its 500-lightyear distance, 60 times greater than Sirius's. Mirzam is a very hot, blue class B bright
giant star with a temperature around 22,000 Kelvin. Much of its radiation is therefore
produced in the ultraviolet, where the eye cannot see, and if that is taken into account this
magnificent star shines with a luminosity 19,000 times that of the Sun and nearly 1000
times that even of Sirius. If Mirzam were at Sirius's distance of 8.6 light years it would
shine in our sky almost 15 times more brightly than Venus at its brightest. Mirzam is
interesting from two points of view. It is one of the local stars whose light is used as a
background to study the thin gas of interstellar space, and lies along a sort of tunnel in
which the gas is especially hot and thin. More importantly, the star is variable. Though
the variations are too feeble to be seen with the naked eye (only about 10%), they are
extremely complex and have multiple periods, the three strongest about a quarter of a
day, that beat against each other like out-of-tune guitar strings. Mirzam is among the
brightest of the "Beta Cephei variables" (after the first discovered), the class also called
"Beta Canis Majoris variables." As a hot giant, Mirzam is beginning its death process, its
core hydrogen fusion shut down. Its new structure causes the variations, but no one really
knows why or how.
Observations:
C8 at 104x.
-6-
Zone 232
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 30.0 inches.
Separation: AB = 147 miles.
Distance (LY): 499
Total luminosity (Suns): 3,172
Moderate
Hough 339
Rating: 4 M
ADS 5046; HD 45129
Position: 0625-1943
A
B
Magnitude
8.59
10.32
Separation PA
—
—
5.1 +
194 -
Year
—
1964
Spectra
G0 V
Colors
Y
Y
Notes:
1890: 4.8 @ 195. 9 measurements.
May be optical because Hipparcos gives different distances (109 and 64 light years).
Observations:
C8 at 104x. It is very faint.
Deep Sky Objects
Moderate
NGC 2204
Other Names: Collinder 88; Raab 34, H VII 13
Astronomical League Program: Herschel 400 Club
Rating: 5 M
Position: 0616-1839
Type: Oc
Dimensions: 12'
Class: II 2r
Cluster population: 80
-7-
Type: 8.6
Zone 232
Notes:
It is 56 light years in diameter and 3 billion years old. Modern surveys indicate at
least 353 members. The brightest star is 12.2m (190 times brighter than the Sun).
It lies 38,000 light years from the galactic center.
There are about 1,200 verified open clusters in our Galaxy. They are all Population I
systems (younger stars with high metal content, concentrated in the Galaxy's spiral arms).
Most don't survive two circuits around the Galaxy before gravitational tides break them
up. Those that last more than half a billion years usually lie high above or below the
galactic plane.
This one is actually much more rarified than what is considered to be the lower limit
for a true open cluster. Yet it has survived about 15 trips around the galaxy!
Observations:
C8 at 104x. Oblong and semi-resolved (8 stars) at high power, it is somewhat coarse.
There is a "K" pattern that dominates, and an orange 9m star to one side.
Model (where the Sun is a baseball):
It would be 8,425 miles in diameter. with stars 975 miles apart.
Distance (LY): 8,570
Luminosity (suns): 2,090
-8-
Zone 232
Zone 232, Map 2
Double Stars
Easy
h3821
Innes (C); ADS 4602; HD 40882; SAO 171128
Rating: 3 E
Position: 0601-2100
A
B
C
Magnitude
8.11
9.43
12.50
Separation
—
17.9 19.8 =
PA
—
215 +
89 +
Year
—
1991
1987
Spectra
A2 III
Colors
W
pV
?
Notes:
AB 1835: 25.0 @ 212. 14 measurements.
AC 1920: 19.8 @ 87. 3 measurements.
Observations:
C8 at 104x. It forms a triangle with two stars— 8.5m and 9.0m.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.1 inches.
Separation: AB = 22.9 miles; AC = 25.3 miles.
Distance (LY): 820
Total luminosity (Suns): 40
South 516
Rating: 3 E
HD 44144; SAO 171562
Position: 0619-2459
A
B
C
a
Magnitude
7.32
8.23
7.04
10.45
Separation
—
61.4 -!
300.5 +
0.5
PA
—
8+
243 +
309
-9-
Year
—
1991
1991
1991
Spectra
A1 V
Colors
W
B
W
No
Zone 232
Notes:
AB 1825: 66.3 @ 3. 15 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. The stars have different proper motions.
AC 1825: 300.0 @ 242. 3 measurements. Common proper motion.
Aa 1 measurement.
Observations:
C8 at 104x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.70 inches.
Separation: AB = 73.8 miles; AC = 361 miles; Aa = 3,172 feet.
Distance (LY): 770
Total luminosity (Suns): 155
h3863
Rating: 3 E
ADS 5128; HD 45941; SAO 171831
Position: 0629-2236
A
B
Magnitude
6.80
8.70
Separation PA
—
—
2.8 +
120 -
Year
—
1991
Notes:
1837: 2.0 @ 121. 15 measurements.
Observations:
C8 at 280x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 5.19 miles.
Distance (LY): 1,190
Total luminosity (Suns): 237
- 10 -
Spectra
A2 V
Colors
Y
Y
Zone 232
h3835
Rating: 4 E
HD 41897; SAO 171248
Position: 0607-2306
A
B
Magnitude
7.47
10.90
Separation PA
—
—
30.3
83
Year
—
1905
Spectra
A0 V
Colors
W
B
Notes:
1 measurement.
Hipparcos/Tycho mission data show different distances for these stars (455 and 120
light years); they may be optical.
Observations:
C8 at 104x.
h3833
Rating: 4 E
ADS 4704; HD 41841; SAO 171236
Position: 0607-2307
A
B
Magnitude
5.46
10.31
Separation PA
—
—
45.8 +
71 -
Year
—
1977
Notes:
1905: 43.8 @ 72. 7 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 34.0 miles.
Distance (LY): 475
Total luminosity (Suns): 114
- 11 -
Spectra
A2 V
Colors
O
?
Zone 232
h3842
Rating: 4 E
ADS 4883; HD 43517; SAO 171469
Position: 0616-2212
A
B
Magnitude
8.78
11.04
Separation PA
—
—
19.8 +
212 -
Year
—
1965
Spectra
A1 V
Colors
bW
W
Notes:
1837: 18.0 @ 215. 3 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.70 inches.
Separation: AB = 145 miles.
Distance (LY): 4,700
Total luminosity (Suns): 544
h3845
Rating: 5 E
HD 43745; SAO 171502
Position: 0617-2243
A
B
Magnitude
6.06
10.44
Separation PA
—
—
47.6 +!! 6 -!
Year
—
1959
Spectra
G0 V
Colors
Y
W
Notes:
1836: 25.0 @ 52. 8 measurements.
May be optical because Hipparcos gives different distances (130 and 4,080 light
years).
Observations:
C11 at 115x.
- 12 -
Zone 232
CPD 1
Rating: 5 E
SAO 171543
Position: 0619-2214
A
B
Magnitude
9.52
10.64
Separation PA
—
—
35.0 +
189 -
Year
—
1991
Spectra
G0
Colors
pY
W
Notes:
1915: 32.4 @ 191. 2 measurements.
May be optical because Hipparcos gives different distances (166 and 323 light years).
Observations:
C11 at 115x. Nice field.
Deep Sky Objects
Moderate
NGC 2207
Other Names: PGC 18749
Rating: 5 M
Position: 0616-2122
Type: Gal
Surface brightness: 13.3
Class: SAB(rs)bc pec
Dimensions: 3' x 2'
Type: 12.3
PA: 96
Notes:
Quite a bit of commotion is happening 114 million light years away with these two
galaxies (NGC 2207 and IC 2163)! The smaller of the two galaxies (IC 2163) is
approximately the same size as our own Milky Way galaxy. These galaxies are passing
very near to one another so that their mutual gravitation influence distorts the shape of
the other. This galactic dance is begining to trigger massive regions of star formations.
[Source: http://www.noao.edu/outreach/aop/observers/n2207.html]
NGC 2207 has hardly been affected by the interaction, but IC 2163 has been horribly
distorted.
- 13 -
Zone 232
This galaxy produced SN 1975A, SN 1999EC (type Ib), and SN 2003H (type Ib)!
Observations:
C8 at 83x. Faint. Three stars to the W are a problem, especially SAO 171460 (8.2m,
K5). The center is small but surprisingly bright, and the galaxy has a NW/SE axis. High
powers are not much help. Observatory photos show this to actually be two interacting
galaxies.
Model (where the Sun is a baseball):
Its diameter would be 32 million miles.
Distance (LY): 114,000,000
Radial velocity (km/sec): +2,741
Luminosity (suns): 12,300,000,000
Difficult
NGC 2139
Other Names: IC 2154, H II 264, PGC 18258
Astronomical League Program: Herschel II Club
Rating: 5 D
Position: 0601-2340
Type: Gal
Surface brightness: 13.3
Class: SAB(rs)cd
Dimensions: 2' x 1.5'
Type: 12.2
PA: 128
Notes:
This galaxy produced SN 1995AD (type II).
This galaxy is in the process of a merger with a smaller galaxy that is being
cannibalized righ before our telescopes!
Observations:
C8 at 65x. It is faint with a stellar nucleus, and is overwhelmed by the moderate field.
Distance (LY): 69,000,000
Radial velocity (km/sec): +1,843
Total luminosity (Suns): 5,000,000,000
- 14 -
Zone 232
NGC 2196
Other Names: H II 265, PGC 18602
Astronomical League Program: Herschel II Club
Rating: 5 D
Position: 0612-2148
Type: Gal
Surface brightness: 13.1
Class: (R':)SA(rs)ab
Dimensions: 2' x 1.4'
Type: 12.6
PA: 42
Observations:
C8 at 83x. Extremely faint, but with a sharp nucleus. A 10m star is to the N, and
another W.
Distance (LY): 90,000,000
Radial velocity (km/sec): +2,321
Total luminosity (Suns): 5,800,000,000
NGC 2223
Other Names: PGC 18978
Rating: 5 D
Position: 0625-2250
Type: Gal
Surface brightness: 13.8
Class: SB(rs)bc
Dimensions: 3.5' x 2.5'
Type: 12.7
PA: 178
Notes:
This galaxy produced SN 1993K (type II).
Observations:
C8 at 104x. Quite faint, due to low surface brightness. The axis runs N-S. Luckily, it
lies in a bleak field, with the nearest bright star being 8.3m. The nucleus is bright.
Distance (LY): 110,000,000
Radial velocity (km/sec): +2,722
Total luminosity (Suns): 7,900,000,000
- 15 -
Zone 232
Zone 232, Map 3
Double Stars
Easy
Nu 1 CMa
Rating: 1 E
6 CMa; Sh 73; Hh 239; ADS 5253; HD 47138; SAO 151694; H IV 81
Position: 0636-1840
A
B
Magnitude
5.71
8.14
Separation PA
—
—
17.5 +
264 +
Year
—
1991
Spectra
G8 III
Colors
Y!!
dB!!
Notes:
1821: 17.4 @ 263. 22 measurements.
Star A is a spectroscopic binary. The stars show similar proper motions, although
Hipparcos gives different distances (277 and 401 light years).
Observations:
C8 at 83x. Webb saw them as Y, pV. Other observers have reported a bewildering
range of colors, including Y and G, Y and bG, Y and pB, D and bG, Y and dB.
Innes 761
Rating: 3 E
ADS 5441
Position: 0646-1948
A
B
Magnitude
10.05
10.63
Separation PA
—
—
3.0 =
154 =
Notes:
1912: 3.0 @ 154. 6 measurements.
Observations:
C11 at 193x.
- 16 -
Year
—
1991
Spectra
A1 IV
Colors
W
W
Zone 232
STF 972 rej
A 3038 (BC); ADS 5473
Rating: 3 E
Position: 0648-1520
A
B
C
BC
Magnitude
7.96
9.24
10.00
Separation PA
—
—
8.5 -! 138 +!
0.1 -
320 +
Year
—
1991
Spectra
B8
Colors
B
W?
No
1983
Notes:
AB 1895: 11.4 @ 24. 21 measurements.
BC 1926: 0.3 @ 311. 5 measurements. Probable rapid motion, but few measures.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.26 inches.
Separation: AB = 145 miles; BC = 1.70 miles.
Distance (LY): 10,900
Total luminosity (Suns): 8,700
Argelander 16
Rating: 4 E
SAO 152029
Position: 0652-1838
A
B
Magnitude
8.92
10.68
Separation PA
—
—
33.6 +
160 -
Notes:
1915: 30.5 @ 161. 2 measurements.
Observations:
C11 at 115x.
- 17 -
Year
—
1991
Spectra
M
Colors
Y
W
Zone 232
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 57.4 inches.
Separation: AB = 11.5 miles.
Distance (LY): 220
Total luminosity (Suns): 1.24
Howe 13
Rating: 5 E
ADS 5242; HD 47011; SAO 151681
Position: 0636-1606
A
B
Magnitude
7.36
11.18
Separation PA
—
—
12.6 +
117 -?
Year
—
1991
Spectra
B9 III
Colors
W
?
Notes:
1876: 11.2 @ 300. 2 measurements. Quadrant reversal?
Observations:
C8 at 83x. Nice field of 8m-9m stars.
Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.6 inches.
Separation: AB = 8.04 miles.
Distance (LY): 409
Total luminosity (Suns): 14.43
Aravamudan 346
Rating: 5 E
Position: 0638-1857
A
B
C
Magnitude
10.11
11.00
13.50
Separation
—
17.0 =
7.0 -
PA
—
177 +
135 -
Notes:
AB 1975: 17.0 @ 176. 2 measurements.
AC 1915: 7.8 @ 138. 2 measurements.
- 18 -
Year
—
1976
1916
Spectra
Colors
W
W
No
Zone 232
AD 1915: 14.1 @ 13. 2 measurements.
May be optical because Hipparcos gives different distances for A and B (393 and
2,040 light years).
Observations:
C11 at 115x.
Gallo 414
Rating: 5 E
Position: 0645-1516
A
B
Magnitude
9.53
10.21
Separation PA
—
—
15.1 +
142 -
Year
—
1906
Spectra
Colors
W
W
Notes:
1904: 14.6 @ 145. 4 measurements.
Observations:
C8 at 104x.
h3902
Bos 2523 (C)
Rating: 5 E
Position: 0657-1821
A
B
Magnitude
10.14
10.26
Separation PA
—
—
14.5 +
235 +?
Year
—
1991
Notes:
1915: 14.0 @ 52. 8 measurements. Quadrant reversal?
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.95 inches.
Separation: AB = 2.78 miles.
Distance (LY): 123
Total luminosity (Suns): 0.198
- 19 -
Spectra
A2
Colors
W
W
Zone 232
Moderate
Bur 19
Rating: 4 M
ADS 5358; HD 48287; SAO 151807
Position: 0642-1600
A
B
Magnitude
6.94
9.05
Separation PA
—
—
3.7 168 -
Year
—
1991
Spectra
B9
Colors
W
O
Notes:
1872: 4.1 @ 169. 18 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.68 inches.
Separation: AB = 4.96 miles.
Distance (LY): 860
Total luminosity (Suns): 112
Barnard 31
Rating: 4 M
ADS 5584
Position: 0655-1630
A
B
C
Magnitude
9.54
10.85
13.00
Separation
—
2.6 +
55
PA
—
298 =
262
Notes:
AB 1910: 2.3 @ 298. 5 measurements.
AC 1 measurement.
Observations:
C11 at 193x.
- 20 -
Year
—
1991
1910
Spectra
ApSi
Colors
W
W
?
Zone 232
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.26 inches.
Separation: AB = 166 miles; AC = 3,519 miles.
Distance (LY): 41,000
Total luminosity (Suns): 27,400
Bur 20
Rating: 5 M
ADS 5484; HD 49649; SAO 151957
Position: 0649-1613
A
B
Magnitude
7.58
10.05
Separation PA
—
—
3.3 +
28 -
Year
—
1991
Spectra
K0 III
Colors
Y
?
Notes:
1876: 3.2 @ 30. 14 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 4.68 miles.
Distance (LY): 910
Total luminosity (Suns): 63
Difficult
Alpha CMa
Rating: 1 D
9 CMa; Sirius, "the scorching one"; A G Clark 1(BC); ADS 5423; HD 48915; SAO
151881
Position: 0645-1643
A
B
Magnitude
-1.44
8.50
Separation PA
—
—
3.7 190 +
- 21 -
Year
—
1997
Spectra
A1 V
A1 V
Colors
W
W
Zone 232
Notes:
1861: 10.3 @ 80. Over 100 measurements.
The primary is 2.35 times the Sun's mass, 1.8 times its diameter, and 23 times its
brightness. It is also a spectroscopic binary and an infra-red source. Its disk has been
measured by intereferometer at 0.0057".
The white dwarf companion is 15,000 miles in diameter and 125,000 times as dense
as water. (A cubic inch of its stuff would weigh 15 tons.) Its surface temperature is
24,800o K and it is only 1/400 as bright as the Sun, yet contains 1.03 solar masses. It is
believed to be what is called a carbon core white dwarf.
Ejecta from this star when it left the Main Sequence may have polluted the
atmosphere of Sirius! A large number of classical writers (such as Horace, Cicero,
Ptolemy and Seneca) wrote of Sirius as being of a reddish (or wine) color. The Greek
words used to support a Red Sirius argument are vague however. One of them is used to
describe the color of the Aegean Sea (hardly a red body of water!) and another is used to
describe the color of sunlight reflected off a bronze shield.
The orbital period is 50.09 years (Van den Bos, 1960).
From James Kaler's Star Notes:
Sirius is bright in part because it truly is luminous. Though a "main sequence" star
that, like the Sun, shines by hydrogen fusion, it is over twice as massive as our star, and
as a result is hotter and brighter, its 9,400 degree temperature making it quite white.
Though 10,000 times fainter than bright Sirius A, Sirius B is the hotter of the two. The
only way it can be hot and faint is to be small. The star has the mass of the Sun, yet is
smaller than Earth... It is the end product of a star that at one time was much more
massive than Sirius A is today.
Observations:
C8 at 280x. I had to use a diffraction mask and a lunar glare filter!
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.40 inches; B = 0.05 inches.
Separation: AB = 264 feet.
Distance (LY): 9
Total luminosity (Suns): 25.502
- 22 -
Zone 232
Bur 898
Rating: 4 D
ADS 5503; HD 49978; SAO 151994
Position: 0650-1602
A
B
C
Magnitude
7.99
10.99
10.60
Separation
—
3.3 +
98.3 +
PA
—
356 =
282 -
Year
—
1991
1984
Spectra
B9 IV
Colors
W
O
W?
Notes:
AB 1879: 3.0 @ 356. 9 measurements.
AC 1879: 96.5 @ 283. 9 measurements.
C has a companion (10.93m) at 2.1 @ 269.
Hipparcos shows the C star to be at a distance of 49 light years.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 7.31 miles; AC = 218 miles.
Distance (LY): 1,420
Total luminosity (Suns): 103
AC 4
Rating: 5 D
ADS 5487; HD 49662; SAO 151962
Position: 0649-1509
A
B
Magnitude
5.39
7.28
Separation PA
—
—
0.5 334 +
Year
—
1999
Spectra
B6 V
Colors
W
W
Notes:
1877: 0.9 @ 291. 26 measurements. The primary is a spectroscopic binary. The
proper motion is small.
Observations:
C8 at 280x. Notched.
- 23 -
Zone 232
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.8 inches.
Separation: AB = 2,482 feet.
Distance (LY): 610
Total luminosity (Suns): 227
Deep Sky Objects
Difficult
NGC 2283
Other Names: H III 271; PGC 19562
Astronomical League Program: Herschel II Club
Rating: 5 D
Position: 0646-1812
Type: Gal
Surface brightness: 13.9
Class: SB(s)cd
Dimensions: 1'
Type: 12.8
PA: 172
Observations:
C8 at 104x. Quite small and faint.
Distance (LY): 28,000,000
Radial velocity (km/sec): +822
Total luminosity (Suns): 500,000,000
- 24 -
Zone 232
Zone 232, Map 4
Reference Star
Xi CMa (4 CMa; HD 46328; SAO 171895)
Position: 0632-2325
Mag : 4.30
Assumed distance: 2,050 light years
Spectrum : B1 III
Color : bW
Assumed luminosity (suns): 6,500
Notes:
This star is a spectroscopic binary.
Double Stars
Easy
h2321
Rating: 2 E
ADS 5164
Position: 0631-2038
A
B
Magnitude
7.94
9.18
Separation PA
—
—
5.4 306 +
Year
—
1963
Spectra
F2 V
Colors
Y
B
Notes:
1830: 8.0 @ 304. 12 measurements.
May be optical because Hipparcos gives different distances (130 and 730 light years).
Observations:
C8 at 104x. Rich field.
- 25 -
Zone 232
h3876
Rating: 2 E
ADS 5260; HD 47247; SAO 172021; H II 60
Position: 0637-2237
A
B
Magnitude
6.19
10.00
Separation PA
—
—
9
336
Year
—
1933
Spectra
B3 V
Colors
W
B
Observations:
C8 at 83x. Rich field to the S.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.6 inches.
Separation: AB = 10.5 miles.
Distance (LY): 750
Total luminosity (Suns): 125
South 537
Bur 324 (AB); ADS 5498; HD 49891; SAO 172389
Rating: 2 E
Position: 0650-2405
A
B
C
D
Magnitude
6.58
8.00
8.75
13.00
Separation
—
1.8 30.3 =
29.3 -
PA
—
209 +
282 =
1-
Year
—
1991
1991
1933
Spectra
A1 V
A2
Colors
Y
No
O
?
Notes:
AB 1875: 2.0 @ 190. 24 measurements.
AC 1825: 30.3 @ 282. 11 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical.
AD 1898: 30.3 @ 2. 3 measurements.
Observations:
C8 at 104x. A nice tight pair lies about 4 min S too.
- 26 -
Zone 232
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.70 inches; C = 7.38 inches.
Separation: AB = 1.62 miles; AC = 27.4 miles; AD = 26.5 miles.
Distance (LY): 580
Total luminosity (Suns): 88.16
South 538
Rating: 2 E
HD 49868; SAO 172383
Position: 0650-2409
A
B
Magnitude
7.16
8.18
Separation PA
—
—
26.9 4+
Year
—
1991
Spectra
A6 V
A0
Colors
W
B
Notes:
1825: 27.8 @ 3. 14 measurements. The stars share common proper motion.
Observations:
C8 at 83x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.20 inches; B = 6.19 inches.
Separation: AB = 26.0 miles.
Distance (LY): 620
Total luminosity (Suns): 52
17 CMa
Rating: 2 E
ADS 5585; HD 51055; SAO 172569; H V 65
Position: 0655-2024
A
B
C
Magnitude
5.80
9.30
9.00
Separation
—
44
50
PA
—
147
184
Notes:
The stars share a small common proper motion.
- 27 -
Year
—
1915
Spectra
A2 IV
K5
Colors
W
R
B
Zone 232
Observations:
C8 at 83x. It forms a nice isosceles triangle.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.8 inches; B = 37.0 inches.
Separation: AB = 41.9 miles; AC = 47.6 miles.
Distance (LY): 610
Total luminosity (Suns): 153
Argelander 15
Rating: 3 E
HD 47116; SAO 172002
Position: 0636-2407
A
B
Magnitude
7.71
9.24
Separation PA
—
—
41.8 +! 235 -
Year
—
1991
Spectra
B9
F8
Colors
W
bW
Notes:
1875: 30.0 @ 240. 14 measurements. The stars have different proper motions and
Hipparcos gives different distances (1,200 and 179 light years).
Observations:
C8 at 83x.
South 534
Rating: 3 E
ADS 5377; HD 48501; SAO 172204
Position: 0643-2227
A
B
Magnitude
6.26
8.57
Separation PA
—
—
18.1 =
144 +
Year
—
1991
Spectra
F2 V
Colors
W
G?
Notes:
1825: 18.1 @ 143. 14 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. However, the stars have similar proper
motions.
- 28 -
Zone 232
Observations:
C8 at 83x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.10 inches.
Separation: AB = 4.49 miles.
Distance (LY): 159
Total luminosity (Suns): 6.7
h2341
Position: 0646-2041
A
B
Magnitude
7.80
8.52
Rating: 3 E
Separation PA
—
—
53.9 +
113 +
Year
—
1988
Spectra
A0
A0
Colors
W
bW
Notes:
1830: 45.0 @ 86. 5 measurements.
The stars share common proper motion.
Observations:
C8 at 83x. It lies on the W edge of the center of the open cluster M41.
Aravamudan 1666
Rating: 3 E
HD 49939; SAO 172394
Position: 0650-2227
A
B
Magnitude
9.07
10.60
Separation PA
—
—
15.0
106
Notes:
1 measurement.
Observations:
C8 at 104x. It is the S vertex of a 9m triangle.
Faint, moderate field.
- 29 -
Year
—
1921
Spectra
A5 V
Colors
yW
?
Zone 232
South 541
Rating: 3 E
HD 51457; SAO 172606
Position: 0657-2239
A
B
Magnitude
7.35
8.70
Separation PA
—
—
23.3 44 +
Year
—
1991
Spectra
K0 III
F
Colors
Y
L
Notes:
1825: 24.1 @ 43. 13 measurements. The stars share common proper motion.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches; B = 13.6 inches.
Separation: AB = 34.9 miles.
Distance (LY): 960
Total luminosity (Suns): 104
Howe 16
Rating: 4 E
ADS 5452
Position: 0647-2041
A
B
Magnitude
8.16
10.06
Separation PA
—
—
4.4 +
190 =
Year
—
1987
Spectra
G6 III
Notes:
1876: 2.3 @ 190. 14 measurements.
Observations:
C11 at 115x. This pair lies on the E edge of the open cluster M41.
- 30 -
Colors
yW
W
Zone 232
Bos 2125
Rating: 4 E
ADS B2125; HD 49846; SAO 172379
Position: 0650-2110
A
B
Magnitude
8.27
10.02
Separation PA
—
—
60.0
135
Year
—
1929
Spectra
B8
Colors
W
?
Notes:
1 measurement.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.34 inches.
Separation: AB = 393 miles.
Distance (LY): 4,200
Total luminosity (Suns): 622
h3877
Innes 756 (B); ADS 5291; HD 47597; SAO 172071
Rating: 5 E
Position: 0639-2302
A
B
C
Magnitude
9.11
10.00
9.90
Separation
—
0.4 15.0 +
PA
—
27 351 =
Notes:
AB 1916: 0.5 @ 45. 5 measurements.
AC 1882: 14.9 @ 351. 6 measurements.
Observations:
C11 at 115x.
- 31 -
Year
—
1990
1991
Spectra
A0
Colors
W
No
W
Zone 232
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.53 inches.
Separation: AB = 475 feet; AC = 3.44 miles.
Distance (LY): 147
Total luminosity (Suns): 0.741
Howe 15
Rating: 5 E
SAO 172308
Position: 0647-2035
A
B
Magnitude
8.77
11.77
Separation PA
—
—
13.0 212 =
Year
—
1920
Spectra
A0
Colors
W
bW
Notes:
1876: 14.4 @ 212. 6 measurements.
Observations:
C8 at 104x. It lies on the N side of an open cluster (M41).
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.41 inches.
Separation: AB = 4.46 miles.
Distance (LY): 220
Total luminosity (Suns): 1.4
Moderate
Pi CMa
19 CMa; ADS 5602; HD 51199; SAO 172579; H N 123
Rating: 3 M
Position: 0656-2008
A
B
Magnitude
4.66
9.70
Separation PA
—
—
11.8 +
18 =
Notes:
1876: 11.3 @ 18. 11 measurements.
- 32 -
Year
—
1933
Spectra
F2 IV
Colors
W
R?
Zone 232
The primary rotates at 120 kps.
Observations:
C8 at 83x. The color on star B is very difficult to ascertain.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.10 inches.
Separation: AB = 1.74 miles.
Distance (LY): 95
Total luminosity (Suns): 9.47
Bur 195
Rating: 4 M
ADS 5371; HD 48425; SAO 172196
Position: 0643-2314
A
B
C
Magnitude
7.07
9.89
12.83
Separation
—
5.8 +
35.8 +
PA
—
215 +
178 =
Year
—
1991
1917
Spectra
B5 V
Colors
B
R?
?
Notes:
AB 1874: 5.0 @ 214. 10 measurements.
AC 1892: 35.0 @ 178. 5 measurements.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.4 inches.
Separation: AB = 10.9 miles; AC = 67.0 miles.
Distance (LY): 1,200
Total luminosity (Suns): 173
Hipparcos 964
Rating: 5 M
Position: 0657-2109
A
B
Magnitude
10.02
12.84
Separation PA
—
—
22.1 +
3-
- 33 -
Year
—
1991
Spectra
B9 III
Colors
W
?
Zone 232
Notes:
1920: 21.1 @ 5. 2 measurements.
Observations:
C11 at 115x.
Difficult
Bos 117
Rating: 4 D
ADS 5419; HD 48916; SAO 172259
Position: 0645-2352
A
B
C
Magnitude
8.24
9.90
11.40
Separation
—
0.9 +
20.7
PA
—
336 +
264
Year
—
1991
1928
Spectra
K0 IV
Colors
yO
No
?
Notes:
AB 1927: 0.8 @ 332. 4 measurements.
AC 1 measurement.
Observations:
C8 at 104x.
Bos 122
Rating: 4 D
ADS 5629; HD 51733; SAO 172644
Position: 0658-2438
A
B
Magnitude
5.45
7.31
Separation PA
—
—
0.3 248 -
Notes:
1926: 0.9 @ 269. 29 measurements.
The stars share common proper motion.
- 34 -
Year
—
1991
Spectra
F0 V
Colors
Y
Y
Zone 232
Observations:
C8 at 516x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.70 inches.
Separation: AB = 264 feet.
Distance (LY): 126
Total luminosity (Suns): 7.8
Deep Sky Objects
Easy
NGC 2287
Rating: 2 E
Other Names: Melotte 52; Collinder 118; Raab 40, M41
Astronomical Leage Program: Messier Club, Urban Deep Sky Club, Messier Binocular
Club
Position: 0647-2044
Type: Oc
Dimensions: 38'
Class: I 3r
Cluster population: 100
Type: 4.5
Notes:
It was known to Aristotle in about 325 BC. Flamsteed observed it on February 16,
1702, and Le Gentil included it in his 1759 list. Messier added it to his list on January
16, 1765.
It is 20 light years in diameter and 190 million years old. Its youngest stars are B3
and B5 types, and it contains four Ap stars, 3 magnetic stars, and one helium star. The
brightest star is the golden 12 CMa (6.9m K3 III, 700 times brighter than the Sun).
Magnetic stars have strong magnetic fields and occur in classes B to F, but normally
in A. Many are variables. The field strength can be determined by the spectral line width
due to the Zeeman Effect.
Helium stars are a rare class of stars, excluding white dwarfs, with outer layers that
contain more helium than hydrogen. They are ancient stars and may be the progenitors of
Type I supernovae.
It lies 29,000 light years from the galactic center and 370 light years below the
galactic plane.
- 35 -
Zone 232
Observations:
C8 at 47x. Very rich but spread out. Note
the large number of R stars, and a few B ones. I
thought a keystone pattern was dominant.
14x70 Binos. Two bright stars, ten fainter
ones, and much glitter behind it all.
Model (where the Sun is a baseball):
Its diameter would be 8,360 miles with stars
900 miles apart.
Distance (LY): 2,350
Luminosity (suns): 6,900
NGC 2287 (M41)
Open cluster (I 3 r; 100 stars)
Observed with C8 on 1/30/92
Magnification: 80x
Collinder 121
Position: 0654-2458
Type: Oc
Dimensions: 50'
Rating: 5 E
Class: III 3p
Cluster population: 20
Type: 2.6
Notes:
The brightest star is the yO 16 CMa (3.8m, 12,500 times brighter than the Sun). The
cluster is 33 light years in diameter.
Observations:
C8 at 37x. This cluster is large and sparse! If you have a rich field adapter, this is a
good place for it.
While you're here, see if you can pick up a tiny clumping of 4 or 5 very faint stars just
north of 16 CMa. This little group appears almost nebulous to me.
Model (where the Sun is a baseball):
Its diameter would be 5,770 miles with stars 980 miles apart.
Distance (LY): 1,540
Luminosity (suns): 17,000
- 36 -
Zone 232
Zone 232 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
Nu 1 CMa
0636-1840
1E
3
South 518
0624-1614
2E
1
h2321
0631-2038
2E
4
h3876
0637-2237
2E
4
South 538
0650-2409
2E
4
South 537
0650-2405
2E
4
17 CMa
0655-2024
2E
4
h3821
0601-2100
3E
2
South 516
0619-2459
3E
2
South 517
0622-1637
3E
1
h3863
0629-2236
3E
2
Argelander 15
0636-2407
3E
4
South 534
0643-2227
3E
4
Innes 761
0646-1948
3E
3
h2341
0646-2041
3E
4
STF 972 rej
Aravamudan
1666
0648-1520
3E
3
0650-2227
3E
4
South 541
0657-2239
3E
4
h3835
0607-2306
4E
2
Component
A
B
A
B
A
B
A
B
A
B
A
B
C
D
A
B
C
A
B
C
A
B
C
a
A
B
C
BC
A
B
A
B
A
B
A
B
A
B
A
B
C
BC
A
B
A
B
A
B
- 37 -
Mag
5.71
8.14
6.95
8.63
7.94
9.18
6.19
10.00
7.16
8.18
6.58
8.00
8.75
13.00
5.80
9.30
9.00
8.11
9.43
12.50
7.32
8.23
7.04
10.45
8.63
5.69
13.80
6.80
8.70
7.71
9.24
6.26
8.57
10.05
10.63
7.80
8.52
7.96
9.24
10.00
9.07
10.60
7.35
8.70
7.47
10.90
Separation
—
17.5 +
—
16.4 —
5.4 —
9
—
26.9 —
1.8 30.3 =
29.3 —
44
50
—
17.9 19.8 =
—
61.4 -!
300.5 +
0.5
—
22.8 =
PA
—
264 +
—
87 =
—
306 +
—
336
—
4+
—
209 +
30.3 =
29.3 —
147
50
—
215 +
19.8 =
—
8+
300.5 +
309
—
192 =
2.3 +
—
2.8 +
—
41.8 +!
—
18.1 =
—
3.0 =
—
53.9 +
—
8.5 -!
251 +
—
120 —
235 —
144 +
—
154 =
—
113 +
—
138 +!
0.1 —
15.0
—
23.3 —
30.3
320 +
—
106
—
44 +
—
83
Zone 232
Designation
Position
Rating
Map
h3833
0607-2307
4E
2
h3842
0616-2212
4E
2
A 3027
0622-1644
4E
1
h3865
0629-1749
4E
1
Howe 16
0647-2041
4E
4
Bos 2125
0650-2110
4E
4
Argelander 16
0652-1838
4E
3
h3845
0617-2243
5E
2
CPD 1
0619-2214
5E
2
Beta CMa
0623-1758
5E
1
Howe 13
0636-1606
5E
3
Aravamudan
346
0638-1857
5E
3
h3877
0639-2302
5E
4
Gallo 414
0645-1516
5E
3
Howe 15
0647-2035
5E
4
h3902
0657-1821
5E
3
Pi CMa
0656-2008
3M
4
Hough 339
0625-1943
4M
1
Bur 19
0642-1600
4M
3
Bur 195
0643-2314
4M
4
Barnard 31
0655-1630
4M
3
Bur 20
0649-1613
5M
3
Hipparcos 964
0657-2109
5M
4
Alpha CMa
0645-1643
1D
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
C
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
C
A
B
A
B
A
B
- 38 -
Mag
5.46
10.31
8.78
11.04
7.97
10.67
8.06
10.22
8.16
10.06
8.27
10.02
8.92
10.68
6.06
10.44
9.52
10.64
1.98
10.68
7.36
11.18
10.11
11.00
13.50
9.11
10.00
9.90
9.53
10.21
8.77
11.77
10.14
10.26
4.66
9.70
8.59
10.32
6.94
9.05
7.07
9.89
12.83
9.54
10.85
13.00
7.58
10.05
10.02
12.84
-1.44
8.50
Separation
—
45.8 +
—
19.8 +
—
87.6 +
—
23.3 —
4.4 +
—
60.0
—
33.6 +
—
47.6 +!!
—
35.0 +
—
188.5 +
—
12.6 +
—
17.0 =
7.0 —
0.4 15.0 +
—
15.1 +
—
13.0 —
14.5 +
—
11.8 +
—
5.1 +
—
3.7 —
5.8 +
35.8 +
—
2.6 +
55
—
3.3 +
—
22.1 +
—
3.7 -
PA
—
71 —
212 —
257 =
—
67 +
—
190 =
—
135
—
160 —
6 -!
—
189 —
340 +
—
117 -?
—
177 +
7.0 —
27 15.0 +
—
142 —
212 =
—
235 +?
—
18 =
—
194 —
168 —
215 +
35.8 +
—
298 =
55
—
28 —
3—
190 +
Zone 232
Designation
Position
Rating
Map
Bos 117
0645-2352
4D
4
Bur 898
0650-1602
4D
3
Bos 122
0658-2438
4D
4
AC 4
0649-1509
5D
3
Component
A
B
C
A
B
C
A
B
A
B
Mag
8.24
9.90
11.40
7.99
10.99
10.60
5.45
7.31
5.39
7.28
Separation
—
0.9 +
20.7
—
3.3 +
98.3 +
—
0.3 —
0.5 -
PA
—
336 +
20.7
—
356 =
98.3 +
—
248 —
334 +
Deep Space Objects
Object
NGC 2287
Collinder 121
NGC 2204
NGC 2207
NGC 2139
NGC 2196
NGC 2223
NGC 2283
Position
0647-2044
0654-2458
0616-1839
0616-2122
0601-2340
0612-2148
0625-2250
0646-1812
Rating
2E
5E
5M
5M
5D
5D
5D
5D
Map
4
4
1
2
2
2
2
3
Specifications
Surface
Type
Mag
Br
Oc (I 3r)
4.5
Oc (III 3p)
2.6
Oc (II 2r)
8.6
Gal (SAB(rs)bc pec)
12.3
13.3
Gal (SAB(rs)cd)
12.2
13.3
Gal ((R':)SA(rs)ab)
12.6
13.1
Gal (SB(rs)bc)
12.7
13.8
Gal (SB(s)cd)
12.8
13.9
- 39 -
Population
100
20
80