+66°00'
Zone 45, Master Map
Zone Master, Normal View, 10 deg FOV
STF 1514
h3333
Ursa Major
South 621
NGC 4125
Hertzsprung 9
Milburn 408
A. G. 174
STF 1567
+64°00'
Stein 739
NGC 4081
STF 1559
STF 1550 rej
STF 1513
H IV 106
Milburn 209
NGC 4041
NGC 4036
α
Stein 735
+62°00'
STF 1505
STF 1512
Dubhe
Alpha UMa
OS 235
NGC 3796
h3334
Kruger 38
Kruger 40
STF 1544
NGC 3770
STF 1519
NGC 3642
NGC 3610
Espin 2638
+58°00'
Stein 736
+60°00'
NGC 3945
IC 694
NGC 3690
NGC 3958
NGC 3613
NGC 3838
Kruger 39
NGC 3674
NGC 3683
NGC 3898
STF 1553
β
STF 1546
M108
NGC 3556
NGC 3990
A 1593
NGC 3982
NGC 3587
NGC 3737
Merak
+56°00'
Stein 1394
Owl Nebula
M97
NGC 3738
OS 243
12h 00m
γ
Gamma UMa
Phecda
11h 48m
11h 36m
11h 24m
11h 12m
11h 00m
Zone 45, Map 1
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+66°00'
STF 1498 rej
Draco
STF 1514
South 621
+65°00'
h3333
A. G. 174
+64°00'
Hertzsprung 9
Milburn 408
STF 1550 rej
+63°00'
STF 1513
H IV 106
+62°00'
STF 1505
STF 1512
STF 1491
+61°00'
Dubheα
Alpha UMa
+60°00'
OS 235
Kruger 38
NGC 3642
STF 1495
NGC 3610
11h 36m
IC 694
NGC 3690
11h 28m
11h 20m
11h 12m
11h 04m
10h 56m
+59°00'
STF 1519
STF 1544
Zone 45, Map 1
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+66°00'
STF 1498 rej
Draco
STF 1514
South 621
+65°00'
STF 1469
Hertzsprung 9
Milburn 408
+64°00'
A. G. 174
+63°00'
STF 1513
H IV 106
+62°00'
STF 1505
STF 1512
OS 235
Kruger 38
STF 1519
STF 1544
NGC 3642
STF 1495
NGC 3610
10h 56m
11h 04m
11h 12m
11h 20m
+61°00'
Dubhe
Alpha UMa
+60°00'
α
+59°00'
STF 1491
IC 694
NGC 3690
11h 36m
11h 28m
Zone 45, Map 2
Normal Image
+61°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+60°00'
OS 235
Kruger 38
NGC 3642
STF 1495
+59°00'
STF 1519
STF 1544
NGC 3610
+58°00'
IC 694
NGC 3690
NGC 3613
+57°00'
Kruger 39
NGC 3674
NGC 3683
STF 1546
Merak
+56°00'
Beta UMa β
Owl Nebula
+54°00'
M97
NGC 3587
+55°00'
M108
NGC 3556
A 1593
11h 28m
11h 20m
11h 12m
11h 04m
10h 56m
Zone 45, Map 2
Mirror Image
Kruger 38
STF 1519
+59°00'
STF 1544
NGC 3642
STF 1495
+58°00'
IC 694
NGC 3690
NGC 3613
NGC 3458
NGC 3674
NGC 3683
+56°00'
Merak
Beta UMa
+57°00'
NGC 3610
β
+60°00'
OS 235
+61°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 3587 Owl Nebula
M97
+54°00'
Stein 2259
+55°00'
M108
NGC 3556
10h 56m
11h 04m
11h 12m
11h 20m
11h 28m
Zone 45, Map 3
Normal Image
+66°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Draco
h3333
+65°00'
Ursa Major
NGC 4125
A. G. 174
Stein 739
NGC 4081
+64°00'
STF 1559
STF 1567
+63°00'
STF 1550 rej
NGC 4041
NGC 4036
OS 235
Stein 735
+61°00'
+62°00'
Milburn 209
NGC 3796
Stein 736
Kruger 38
h3334
Kruger 40
+60°00'
NGC 3945
h2598
STF 1544
+59°00'
NGC 3770
Espin 2638
12h 00m
11h 52m
11h 44m
11h 36m
IC 694
NGC 3690
11h 28m
Zone 45, Map 3
Mirror Image
+66°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Draco
h3333
+65°00'
Ursa Major
A. G. 174
Stein 739
NGC 4081
+64°00'
STF 1559
STF 1567
NGC 4041
OS 235
+61°00'
NGC 4036
+62°00'
Milburn 209
+63°00'
STF 1550 rej
Stein 735
NGC 3796
Kruger 38
Stein 736
h3334
+60°00'
NGC 3945
Kruger 40
STF 1544
+59°00'
NGC 3770
Espin 2638
IC 694
NGC 3690
11h 36m
11h 28m
11h 44m
11h 52m
12h 00m
Zone 45, Map 4
Normal Image
+61°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
OS 235
Stein 735
+60°00'
NGC 3945
h2598
NGC 3796
Stein 736
Kruger 38
h3334
Kruger 40
STF 1544
+59°00'
NGC 3770
Espin 2638
IC 694
NGC 3690
+58°00'
NGC 3958
NGC 3838
Stein 1394
A 1358
NGC 3898
NGC 3990
MCG +09-20-046
STF 1546
A 1593
+55°00'
NGC 3998
STF 1553
+56°00'
+57°00'
Kruger 39
NGC 3982
NGC 3737
+54°00'
NGC 3738
Gamma UMaγ
OS 243
NGC 3992
M109
12h 00m
Phecda
11h 52m
11h 44m
11h 36m
11h 28m
Zone 45, Map 4
Mirror Image
OS 235
+61°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Stein 735
NGC 3796
Kruger 38
Stein 736
h3334
+60°00'
NGC 3945
Kruger 40
STF 1544
Espin 2638
IC 694
NGC 3690
NGC 3958
+57°00'
NGC 3838
Stein 1394
STF 1546
STF 1553
+56°00'
NGC 3674
NGC 3683
NGC 3898
NGC 3998
A 1593
NGC 3990
MCG +09-20-046
NGC 3982
NGC 3737
+55°00'
Kruger 39
+58°00'
+59°00'
NGC 3770
+54°00'
NGC 3738
γ
11h 28m
11h 36m
11h 44m
11h 52m
Gamma UMa
Phecda
NGC 3992 M109 OS 243
12h 00m
Zone 45
Index
1 Reference Star; 26 Double Stars;
1 Planetary Nebula; 17 Galaxies
A
N
A 1593...................................................... 24
A. G. 174 ................................................... 6
Alpha UMa ................................................ 7
NGC 3556................................................ 15
NGC 3587................................................ 11
NGC 3610................................................ 13
NGC 3613................................................ 13
NGC 3642................................................ 14
NGC 3674................................................ 14
NGC 3683................................................ 15
NGC 3690................................................ 16
NGC 3770................................................ 23
NGC 3796................................................ 23
NGC 3838................................................ 30
NGC 3898................................................ 28
NGC 3945................................................ 22
NGC 3958................................................ 30
NGC 3982................................................ 27
NGC 3990................................................ 29
NGC 3998................................................ 29
B
Beta UMa................................................... 9
E
Espin 2638 ............................................... 26
H
H IV 106 .................................................... 4
h3334 ........................................................ 19
Hertzsprung 9 ............................................ 6
I
IC 694....................................................... 12
K
O
Kruger 38 ................................................. 17
Kruger 39 ................................................. 26
Kruger 40 ................................................. 20
OS 235 ..................................................... 22
S
M
Stein 1394 ................................................ 27
Stein 735 .................................................. 20
Milburn 408 ............................................... 5
-1-
Zone 45
Stein 736 .................................................. 21
STF 1495 ................................................... 9
STF 1505 ................................................... 3
STF 1512 ................................................... 3
STF 1513 ................................................... 5
STF 1519 ................................................. 10
STF 1544 ................................................. 17
STF 1546 ................................................. 24
STF 1550 rej............................................ 18
STF 1553 ................................................. 25
STF 1559 ................................................. 21
STF 1567 ................................................. 18
-2-
Zone 45
Zone 45, Map 1
Double Stars
Easy
STF 1505
Other name(s): ADS 8049; HD 96027; SAO 15396
Rating: 5 E
Position: 1106+6236
A
B
C
Magnitude
8.62
10.17
12.30
Separation
—
8.2 +
217.9 -
PA
—
313 176 +
Year
—
1991
1910
Spectra
G5
Colors
yW
No
?
Notes:
AB 1831: 8.1 @ 314. 16 measurements. The stars have different proper motions.
AC 1880: 218.1 @ 175. 2 measurements.
Observations:
C8 at 104x. Star B gets lost in a faint but nice field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.1 inches.
Separation: AB = 10.1 miles; AC = 269 miles.
Distance (LY): 790
Total luminosity (Suns): 20.4
STF 1512
Other name(s): ADS 8072
Rating: 4 E
Position: 1109+6230
A
B
Magnitude
8.56
8.75
Separation PA
—
—
9.9 +
51 =
-3-
Year
—
1991
Spectra
A2
A2
Colors
bW
O
Zone 45
Notes:
1831: 9.4 @ 51. 26 measurements. The stars have different proper motions.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.30 inches; B = 7.38 inches.
Separation: AB = 46.3 miles.
Distance (LY): 3,000
Total luminosity (Suns): 800
H IV 106
Other name(s): ADS 8073; HD 96758; SAO 15415
Rating: 5 E
Position: 1110+6320
A
B
Magnitude
7.91
10.79
Separation PA
—
—
20.2 =
133 +
Year
—
1939
Spectra
F7 V
Colors
W
?
Notes:
1783: 20.2 @ 132. 4 measurements.
This system may be optical as the stars appear to be at different distances and have
different proper motions.
Observations:
C11 at 115x.
-4-
Zone 45
STF 1513
Other name(s): ADS 8073; HD 96758; SAO 15415; H IV 106
Rating: 5 E
Position: 1110+6320
A
B
Magnitude
7.90
10.80
Separation PA
—
—
20.2 =
133 +
Year
—
1939
Spectra
F5 V
Colors
W
W
Notes:
1783: 20.2 @ 132. 4 measurements. Hipparcos/Tycho mission data show different
distances for these stars; they may be optical.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.35 inches.
Separation: AB = 9.45 miles.
Distance (LY): 300
Total luminosity (Suns): 5.34
Milburn 408
Other name(s): ADS 8081
Rating: 5 E
Position: 1111+6443
A
B
Magnitude
9.11
10.90
Separation PA
—
—
8.2
345
Notes:
This pair is B of Hertzsprung 9.
1 measurement.
Observations:
C11 at 115x.
-5-
Year
—
1925
Spectra
F5
Colors
W
?
Zone 45
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.9 inches.
Separation: AB = 2.00 miles.
Distance (LY): 157
Total luminosity (Suns): 0.522
Hertzsprung 9
Other name(s): HD 96949; SAO 15422
Rating: 5 E
Position: 1111+6444
A
B
Magnitude
9.19
9.96
Separation PA
—
—
103.8 319 +?
Year
—
1991
Spectra
G5
Colors
yW
W
Notes:
1907: 104.9 @ 137. 7 measurements. The 1991 data shows a quadrant reversal.
This system may be optical as the stars appear to be at different distances and have
different proper motions.
Observations:
C11 at 115x. The A star is also the primary of Milburn 408.
A. G. 174
Other name(s): ADS 8143
Rating: 3 E
Position: 1123+6443
A
B
Magnitude
9.85
10.32
Separation PA
—
—
2.1 =
104 -
Notes:
1892: 2.1 @ 105. 11 measurements.
Observations:
C11 at 193x.
-6-
Year
—
1991
Spectra
K0
Colors
Y
Y
Zone 45
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 27.0 inches.
Separation: AB = 1.56 miles.
Distance (LY): 479
Total luminosity (Suns): 3.4
Difficult
Alpha UMa
Rating: 5 D
Other name(s): 50 UMa; Dubhe, "the bear"; Bur 1077; ADS 8035; HD 95689; SAO
15384
Position: 1104+6145
A
B
Magnitude
1.81
4.91
Separation PA
—
—
0.5 226 -
Year
—
1997
Spectra
K0 III
F0 V
Colors
O
Y
Notes:
1889: 0.9 @ 326. 53 measurements.
This system has an orbital period of 44.66 years (Couteau, 1958) with semi-major
axis of 0.60" and retrograde motion.
This pair was discovered by Sherburne Burnham in 1889 at Lick Observatory and is
also a spectroscopic binary (with a 6.04 day period). The total mass of A-a is about 3
suns, each star being approximately 1.5 solar masses.
From James Kaler's Star Notes:
Dubhe (the "h" silent, the final "e" pronounced almost any way you wish) means "the
bear" itself, and comes from a longer phrase that indicates the star's location on the back
of the Great Bear.
As appropriate for the Dipper's lead star, Dubhe quite stands out among the others that
make the famed figure. The middle five stars, which include Mizar along with its little
companion Alcor, are all warm class A stars that are part of a physical cluster all about 80
light years away. Dubhe, however, is not a part of the system (nor is Alkaid), and is half
again as distant, the most distant of the Dipper stars.
As a class K giant with a temperature of 4,500 Kelvin, it is also the coolest of them
(its orange color easily noted), and the only one that is evolved and in the long process of
dying, though for now it is temporarily stabilized by the fusion of helium in its core.
Dubhe is orbited at a distance of about 23 Earth-Sun distances (somewhat greater than
the distance between Uranus and the Sun) by a warmer and much dimmer and less
-7-
Zone 45
massive class F star that takes 44 years to go around. Someone riding a planet orbiting
the F star would see vastly brighter Dubhe as a second orange sun with about half the
brightness of the Sun in our sky. Over 400 times farther away is another class F star that
also has a companion (with a six- day period), from which Dubhe would appear as a
brilliant orange star over 10 times brighter then Venus, making a total of four stars in the
system. The Dipper's middle five stars are all moving together, while Dubhe and Alkaid
are going in the other direction, the Dipper destined to fall apart over the next tens of
thousands of years.
Observations:
C8 at 697x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 46.2 inches.
Separation: AB = 475 feet.
Distance (LY): 124
Total luminosity (Suns): 300
-8-
Zone 45
Zone 45, Map 2
Reference Star
Beta UMa
Rating: na
Other name(s): 48 UMa; Mirak, "the loin"; HD 95418; SAO 27876
Position: 1102+5623
A
Magnitude
2.34
Separation PA
—
—
Year
—
Spectra
A1 V
Colors
Notes:
Star A is a spectroscopic binary and an infra-red source. The system is part of the
Ursa Major moving stream, a system that includes about 100 stars scattered over a 1,000
minute area, and including Gamma, Delta, Epsilon and Zeta UMa, as well as Sirius (!).
Double Stars
Easy
STF 1495
Other name(s): ADS 8001; HD 95098; SAO 27861
Rating: 1 E
Position: 1100+5855
A
B
Magnitude
7.12
8.95
Separation PA
—
—
34.3 37 -
Year
—
1999
Spectra
K2 III
K0
Colors
Y!
dB!?
Notes:
1823: 34.4 @ 38. 29 measurements.
Hipparcos/Tycho data show different distances for these stars; they may be optical.
However, the stars show similar proper motion.
Observations:
C8 at 104x. Franks saw yW and B.
-9-
Zone 45
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 49.5 inches; B = 25.7 inches.
Separation: AB = 33.7 miles.
Distance (LY): 630
Total luminosity (Suns): 59
Moderate
STF 1519
Other name(s): ADS 8103; HD 97772; SAO 15448
Rating: 3 M
Position: 1116+5947
A
B
Magnitude
8.63
9.61
Separation PA
—
—
1.4 +
290 -
Year
—
1991
Notes:
1832: 1.3 @ 291. 17 measurements.
Observations:
C11 at 339x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.5 inches.
Separation: AB = 1.31 miles.
Distance (LY): 600
Total luminosity (Suns): 14
- 10 -
Spectra
F5
Colors
W
Y
Zone 45
Deep Sky Objects
NGC 3587
Other Names: Owl Nebula; PK 148+57.1, M97
Rating: 2 E
Position: 1115+5501
Type : Pn
Dimensions: 3'
Class: 3a
Magnitude : 11.0
Notes:
This planetary was discovered by P. Mechain on February 16, 1781 and named by
Lord Rosse. It is one of Messier’s faintest objects.
Lord Rosse started a mystery: he claims to have seen a star in each "eye" socket.
Today, large scopes do show a star in the left "eye", but the other has either dimmed out
of view or was never there to begin with.
It is 3 light years in diameter.
The central star is 85,000o K at the surface and only 4% the size of the sun. Its total
mass is 10% to 15% of the sun.
The "eyes" are apparently the ends of a tube of gas oriented not quite end on to us.
Observations:
C8 at 83x. Large and easy; I saw the "eyes" with an O-III filter! Use high powers,
and note the 11m star on the NE edge.
Model (where the Sun is a baseball):
Its diameter would be 843 miles.
Distance (LY): 3,000
Luminosity (suns): 28
See sketch, next page.
- 11 -
Zone 45
NGC 3587 (M97, The Owl Nebula)
Planetary nebula
Observed with C8 on 2/2/92
Magnification: 62x
IC 694
Other Names: UGC 6471
Rating: 4 E
Position: 1129+5834
Type : Gal
Surface brightness: 11.3
Class: SBm
Dimensions: 1.2' x 1'
- 12 -
Magnitude : 11.8
Zone 45
Notes:
It is colliding with NGC 3690 and is in a starburst phase. (However, Yamaoka et al,
1998, point out that IC 694 is actually a small E/S0 galaxy about 1 min to the NW of the
merging pair that is usually classed as NGC 3690.)
It was discovered in 1893 by Swift.
Observations:
C8 at 104x. It is a bright, bluish, unfocusable star without any detectable halo.
Moderate
NGC 3610
Other Names: UGC 6319, H I 270
Rating: 5 M
Position: 1118+5847
Type : Gal
Surface brightness: 13.2
Class: E4
Dimensions: 3.2'
Magnitude : 11.6
Observations:
C8 at 65x. Small bright and oblong nucleus; not much halo seen.
Distance: 81,000,000 light years
Radial velocity (km/sec): +1,867
Luminosity: 11,800,000,000 Suns
NGC 3613
Other Names: UGC 6323, H I 271
Rating: 5 M
Position: 1119+5800
Type : Gal
Surface brightness: 12.8
Class: E5
Dimensions: 2' x 1'
Magnitude : 11.7
PA: 102
Observations:
C8 at 65x. Grainy, with an E to W axis. Barbara Wilson's notes say that this galaxy
"looks like a hairy star".
- 13 -
Zone 45
Distance: 94,000,000 light years
Radial velocity (km/sec): +2,150
Luminosity: 14,500,000,000 Suns
NGC 3642
Other Names: UGC 6385, H I 245
Rating: 4 M
Position: 1122+5905
Type : Gal
Surface brightness: 14.6
Class: Sc
Dimensions: 5.5 x 4.2
Magnitude : 11.9
PA: 105
Observations:
C8 at 83x. Very small and bright nucleus with a large, diffuse halo. The axis runs EW.
Distance: 75,000,000 light years
Luminosity: 7,700,000,000 Suns
Radial velocity (km/sec): +1,727
NGC 3674
Other Names: H II 886
Rating: 5 M
Position: 1126+5703
Type : Gal
Surface brightness: 11.8
Class: S0
Dimensions: 1.5' x 0.5'
Observations:
C8 at 104x. It shows a sharp, stellar nucleus and no halo.
Radial velocity (km/sec): +2,119
- 14 -
Magnitude : 12.2
PA: 33
Zone 45
Difficult
NGC 3556
Other Names: UGC 6225, M108, H V 46
Rating: 4 D
Position: 1112+5540
Type : Gal
Surface brightness: 13.0
Class: Sc
Dimensions: 8' x 1'
Magnitude : 10.8
PA: 80
Notes:
It is 85,000 light years in diameter.
Observations:
C8 at 65x. Large and dim, with an E-W axis. A 12m star lies near the center. It has a
splotchy appearance at higher powers.
Model (where the Sun is a baseball):
Its diameter would be 25 million miles.
Distance (LY): 45,000,000
Radial velocity (km/sec): +720
Luminosity (suns): 7,600,000,000
NGC 3683
Other Names: H I 246
Rating: 5 D
Position: 1128+5653
Type : Gal
Surface brightness: 12.6
Class: Sc
Dimensions: 2.1' x 0.8'
Magnitude : 12.4
PA: 128
Notes:
This galaxy produced SN 2004C (type Ic), detected on January 12 by C. C. Dudley
and J. Fischer, Naval Research Laboratory, using the U. S. N. O.’s 1.55 meter telescope.
Observations:
C8 at 104x. It displayed a faint, stellar nucleus without a halo.
Distance: 78,000,000 light years
Radial velocity (km/sec): +1,716
Luminosity: 5,300,000,000 Suns
- 15 -
Zone 45
NGC 3690
Other Names: UGC 6472, H I 247
Rating: 5 D
Position: 1129+5833
Type : Gal
Surface brightness: 13.1
Class: S pec
Dimensions: 3' x 2'
Magnitude : 12.1
PA: 50
Notes:
This galaxy is colliding with IC 694 (invisible to an 8" scope).
This galaxy produced supernova 1992bu, 1998T (type Ib), and 1999D.
Observations:
C8 at 65x. Vague; it looks mottled at high powers.
Model (where the Sun is a baseball):
Its diameter would be 38 million miles (61 million km).
Distance (LY): 137,000,000
Radial velocity (km/sec): +3,121
Luminosity (suns): 21,300,000,000
- 16 -
Zone 45
Zone 45, Map 3
Double Stars
Easy
STF 1544
Other name(s): ADS 8191; HD 100054; SAO 28043
Rating: 2 E
Position: 1131+5942
A
B
Magnitude
7.31
8.24
Separation PA
—
—
12.2 91 +
Year
—
1991
Spectra
A5 m
A5
Colors
W
B
Notes:
1831: 12.5 @ 90. 35 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical. B is a spectroscopic binary.
Observations:
C8 at 65x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.77 inches; B = 8.25 inches.
Separation: AB = 16.0 miles.
Distance (LY): 840
Total luminosity (Suns): 100
Kruger 38
Other name(s): ADS 8203
Rating: 3 E
Position: 1133+6004
A
B
Magnitude
9.93
10.22
Separation PA
—
—
2.8 +
51 -
Notes:
1891: 2.6 @ 54. 23 measurements.
- 17 -
Year
—
1999
Spectra
Colors
W
yW
Zone 45
Observations:
C11 at 193x.
STF 1550 rej
Other name(s): HD 100534; SAO 15556
Rating: 4 E
Position: 1135+6339
A
B
Magnitude
8.87
11.74
Separation PA
—
—
18.9 45 -
Year
—
1991
Spectra
G0
Colors
W
W
Notes:
1892: 22.6 @ 57. 5 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.8 inches.
Separation: AB = 7.04 miles.
Distance (LY): 239
Total luminosity (Suns): 1.3
STF 1567
Other name(s): ADS 8274; HD 101739; SAO 15609
Rating: 3 E
Position: 1143+6421
A
B
Magnitude
9.23
10.46
Separation PA
—
—
3.5 +
84 +
Notes:
1832: 3.4 @ 78. 9 measurements.
- 18 -
Year
—
1987
Spectra
F5
Colors
W
yW?
Zone 45
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.0 inches.
Separation: AB = 16.2 miles.
Distance (LY): 2,970
Total luminosity (Suns): 185
h3334
Other name(s): HD 102030; SAO 15622
Rating: 5 E
Position: 1145+6003
A
B
Magnitude
7.70
12.85
Separation PA
—
—
44.5
156
Year
—
1904
Spectra
K2
Notes:
1 measurement.
Observations:
C8 at 104x. It sits in a "bowl" of four 9m stars.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 26.3 inches.
Separation: AB = 77.8 miles.
Distance (LY): 1,120
Total luminosity (Suns): 100.68
- 19 -
Colors
yO
?
Zone 45
Kruger 40
Other name(s): ADS 8301
Rating: 4 E
Position: 1147+5951
A
B
Magnitude
9.37
10.04
Separation PA
—
—
3.3 +
274 +
Year
—
1991
Spectra
G5
Colors
W
W
Notes:
1891: 2.9 @ 273. 17 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 21.0 inches.
Separation: AB = 8.08 miles.
Distance (LY): 1,570
Total luminosity (Suns): 53
Stein 735
Rating: 4 E
Position: 1153+6100
A
B
Magnitude
10.58
11.65
Separation PA
—
—
9.2 31 +
Year
—
1991
Notes:
1907: 9.9 @ 28. 4 measurements.
Observations:
C11 at 115x.
Distance (LY): 193
Total luminosity (Suns): 0.234
- 20 -
Spectra
Colors
W
B
Zone 45
Stein 736
Rating: 4 E
Position: 1159+6002
A
B
Magnitude
9.89
12.20
Separation PA
—
—
7.0
324
Year
—
1906
Spectra
Colors
O
rO
Notes:
1 measurement.
Observations:
C11 at 115x.
Moderate
STF 1559
Other name(s): ADS 8249; HD 101150; SAO 15580
Rating: 4 M
Position: 1139+6421
A
B
Magnitude
6.84
8.10
Separation PA
—
—
1.8 322 -
Year
—
1997
Notes:
1831: 2.1 @ 323. 69 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.15 inches.
Separation: AB = 1.79 miles.
Distance (LY): 640
Total luminosity (Suns): 105
- 21 -
Spectra
A5 IV
Colors
W
O
Zone 45
Difficult
OS 235
Other name(s): ADS 8197; HD 100203; SAO 15542
Rating: 5 D
Position: 1132+6105
A
B
C
Magnitude
5.46
7.36
11.30
Separation
—
0.6 +
196.8
PA
—
318 +
98
Year
—
1995
1913
Spectra
F6 V
Colors
O
W
No
Notes:
AB 1843: 0.5 @ 283. Over 100 measurements. Orbital period of 73.0 years, with
semi-major axis of 0.81", motion direct.
AC 1 measurement.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.20 inches.
Separation: AB = 422 feet; AC = 27.6 miles.
Distance (LY): 90
Total luminosity (Suns): 4.94
Deep Sky Objects
Moderate
NGC 3945
Other Names: UGC 6860, H I 251
Rating: 5 M
Position: 1153+6041
Type : Gal
Surface brightness: 14.0
Class: SB(rs)0+
Dimensions: 5' x 2'
- 22 -
Magnitude : 11.9
Zone 45
Observations:
C8 at 65x. Small and faint, with a N-S axis. Small bright nucleus. A faint star (12m)
lies 2 min SE, and an E-W pair of 8m stars lies 30 min ESE.
Distance: 58,000,000 light years
Radial velocity (km/sec): +1,337
Luminosity: 4,600,000,000 Suns
Difficult
NGC 3770
Other Names: H II 838
Rating: 5 D
Position: 1138+5937
Type : Gal
Surface brightness: 12.2
Class: SBa
Dimensions: 1.1' x 0.7'
Magnitude : 12.9
PA: 107
Observations:
C8 at 104x. It appeared as a small, fuzzy star without any details.
Radial velocity (km/sec): +3,250
NGC 3796
Other Names:
Rating: 5 D
Position: 1141+6018
Type : Gal
Surface brightness: 12.4
Class: S?
Dimensions: 1.4' x 0.9'
Magnitude : 12.5
PA: 127
Observations:
C8 at 104x. I saw it as a very faint, amorphous glow seen with tube movement and
averted vision.
Radial velocity (km/sec): +1,239
- 23 -
Zone 45
Zone 45, Map 4
Double Stars
Easy
STF 1546
Other name(s): ADS 8199; HD 100214; SAO 28050
Rating: 4 E
Position: 1132+5606
A
B
Magnitude
7.50
10.42
Separation PA
—
—
11.5 =
348 +
Year
—
1991
Spectra
F8
Colors
yW
R
Notes:
1832: 11.5 @ 343. 11 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.5 inches.
Separation: AB = 3.23 miles.
Distance (LY): 180
Total luminosity (Suns): 2.7
A 1593
Other name(s): ADS 8207; HD 100284; SAO 28051
Rating: 3 E
Position: 1133+5525
A
B
Magnitude
8.48
10.59
Separation PA
—
—
4.2 +
255 +
- 24 -
Year
—
1991
Spectra
F8
Colors
W
rO
Zone 45
Notes:
1907: 3.9 @ 253. 9 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 15.4 inches.
Separation: AB = 4.58 miles.
Distance (LY): 700
Total luminosity (Suns): 17.8
STF 1553
Other name(s): ADS 8236; HD 100831; SAO 28071
Rating: 2 E
Position: 1137+5608
A
B
Magnitude
7.16
7.68
Separation PA
—
—
6.0 +
166 -
Year
—
1996
Spectra
G5
Colors
W
W
Notes:
1832: 5.3 @ 172. 86 measurements. The stars share a large common proper motion.
Observations:
C8 at 65x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.3 inches.
Separation: AB = 1.32 miles.
Distance (LY): 142
Total luminosity (Suns): 2.8
- 25 -
Zone 45
Espin 2638
Other name(s): HD 101548; SAO 28095
Rating: 3 E
Position: 1141+5855
A
B
Magnitude
8.88
9.41
Separation PA
—
—
30.5 +
352 =
Year
—
1991
Spectra
G
Colors
Y
O
Notes:
1906: 30.4 @ 352. 13 measurements.
May be optical because Hipparcos gives different distances (276 and 199 light years).
However, the stars share a very large common proper motion.
Observations:
C8 at 104x.
Moderate
Kruger 39
Other name(s): P Muller 551 (a); ADS 8209; HD 238013
Rating: 3 M
Position: 1133+5748
A
B
C
Magnitude
9.66
10.85
11.28
Separation
—
10.5 18.6 +
PA
—
153 270 =
Year
—
1991
1988
Notes:
AB 1891: 10.7 @ 156. 8 measurements.
AC 1898: 17.6 @ 270. 2 measurements.
Observations:
C11 at 634x. Very rich field-- almost like an open cluster!
- 26 -
Spectra
G5 V
Colors
W
Y
B
Zone 45
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.00 inches.
Separation: AB = 2.04 miles; AC = 3.62 miles.
Distance (LY): 125
Total luminosity (Suns): 0.278
Stein 1394
Rating: 5 M
Position: 1137+5716
A
B
Magnitude
11.19
11.50
Separation PA
—
—
8.7
187
Year
—
1911
Spectra
Colors
W
W
Notes:
1 measurement.
Observations:
C11 at 115x.
Deep Sky Objects
Easy
NGC 3982
Other Names: UGC 6918, H IV 62
Rating: 5 E
Position: 1157+5508
Type : Gal
Surface brightness: 12.4
Class: Sb
Dimensions: 2'
- 27 -
Magnitude : 11.8
Zone 45
Notes:
NGC 3982 was discovered by William Herschel on April 14, 1789, and mis-classified
as planetary nebula, as can be seen from his catalog entry in his fourth object group and
his numbering H IV.62.
It is a member of the Ursa Major Cloud or Cluster of Galaxies, which also contains M
109.
On April 13, 1998, British amateur astronomer Mark Armstrong discovered
supernova 1998aq on a CCD image at about 14.9 magnitudes. This SN reached at least
mag 12.2; estimates even mentioned 11.4 visual magnitudes. From its Spectrum
(obtained by CfA/Harvard) this supernova was classified as of type Ia.
[www.seds.org/~spider/spider/Misc/n3982.html, Mar. 19, 2006]
Observations:
C8 at 104x. Small and bright, it takes high power well, but reveals no details. It is 6
min SE of a faint star.
Distance: 53,000,000 light years
Radial velocity (km/sec): +1,109
Luminosity: 4,200,000,000 Suns
Moderate
NGC 3898
Other Names: UGC 6787, H I 228
Rating: 5 M
Position: 1149+5605
Type : Gal
Surface brightness: 12.5
Class: SA(s)ab
Dimensions: 3' x 1'
Magnitude : 11.9
PA: 107
Notes:
This is a Seyfert galaxy.
Observations:
C8 at 65x. Looks like a fuzzy star, with an E to W axis. It lies 35 min NE of the
ruddy carbon star SAO 28142 (5.3m).
Distance: 49,000,000 light years
Radial velocity (km/sec): +1,134
Luminosity: 3,300,000,000 Suns
- 28 -
Zone 45
NGC 3990
Other Names: H II 791; UGC 6938
Rating: 4 M
Position: 1158+5528
Type : Gal
Surface brightness: 12.5
Class: S0-:
Dimensions: 1.4' x 0.8'
Magnitude : 12.6
PA: 40
Observations:
C8 at 104x. It is bright and uniform, but reveals no details, even at 200x.
Model (where the Sun is a baseball):
Its diameter would be 9 million miles (14.5 million km).
Distance (LY): 65,000,000
Radial velocity (km/sec): +696
Luminosity (suns): 3,100,000,000
NGC 3998
Other Names: H I 229; UGC 6946
Rating: 3 M
Position: 1158+5527
Type : Gal
Surface brightness: 12.7
Class: SA(r)0o?
Dimensions: 1.6' x 1'
Magnitude : 11.6
PA: 140
Notes:
This is a Seyfert galaxy.
Observations:
C8 at 104x. Very bright and large, with a roundish shape and even light; perhaps
slightly brighter at the center. At 200x, the core is much sharper and the galaxy appears
slightly mottled.
Distance: 54,000,000 light years
Radial velocity (km/sec): +1,205
Luminosity: 5,300,000,000 Suns
- 29 -
Zone 45
Difficult
NGC 3838
Other Names: H II 831; UGC 6707
Rating: 4 D
Position: 1144+5757
Type : Gal
Surface brightness: 11.8
Class: SA0/a?
Dimensions: 1.4' x 0.5'
Magnitude : 12.3
PA: 141
Observations:
C8 at 104x. It looks like a faint, fuzzy star without details.
Radial velocity (km/sec): +3,838
NGC 3958
Other Names: H II 833
Rating: 5 D
Position: 1155+5822
Type : Gal
Surface brightness: 12.4
Class: SB(s)a
Dimensions: 1.4' x 0.6'
Magnitude : 13.0
PA: 28
Observations:
C8 at 104x. It displayed a very faint, star-like nucleus and a tiny halo. Several 8m
and 9m stars lie along the south end of the field.
Distance: 48,000,000 light years
Radial velocity (km/sec): +3,367
Luminosity: 1,200,000,000 Suns
- 30 -
Zone 45
Zone 45 Mini-Catalog
Double Stars
Star
Designation
Position
Rating
Map
STF 1495
1100+5855
1E
2
STF 1544
1131+5942
2E
3
STF 1553
1137+5608
2E
4
A. G. 174
1123+6443
3E
1
A 1593
1133+5525
3E
4
Kruger 38
1133+6004
3E
3
Espin 2638
1141+5855
3E
4
STF 1567
1143+6421
3E
3
STF 1512
1109+6230
4E
1
STF 1546
1132+5606
4E
4
STF 1550 rej
1135+6339
4E
3
Kruger 40
1147+5951
4E
3
Stein 735
1153+6100
4E
3
Stein 736
1159+6002
4E
3
STF 1505
1106+6236
5E
1
H IV 106
1110+6320
5E
1
STF 1513
1110+6320
5E
1
Hertzsprung 9
1111+6444
5E
1
Milburn 408
1111+6443
5E
1
h3334
1145+6003
5E
3
STF 1519
1116+5947
3M
2
Kruger 39
1133+5748
3M
4
STF 1559
1139+6421
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
C
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
- 31 -
Specifications
Mag
Sep from A
7.12
—
8.95
34.3 7.31
—
8.24
12.2 7.16
—
7.68
6.0 +
9.85
—
10.32
2.1 =
8.48
—
10.59
4.2 +
9.93
—
10.22
2.8 +
8.88
—
9.41
30.5 +
9.23
—
10.46
3.5 +
8.56
—
8.75
9.9 +
7.50
—
10.42
11.5 =
8.87
—
11.74
18.9 9.37
—
10.04
3.3 +
10.58
—
11.65
9.2 9.89
—
12.20
7.0
8.62
—
10.17
8.2 +
12.30
217.9 7.91
—
10.79
20.2 =
7.90
—
10.80
20.2 =
9.19
—
9.96
103.8 9.11
—
10.90
8.2
7.70
—
12.85
44.5
8.63
—
9.61
1.4 +
9.66
—
10.85
10.5 11.28
18.6 +
6.84
—
8.10
1.8 -
PA from A
—
37 —
91 +
—
166 —
104 —
255 +
—
51 —
352 =
—
84 +
—
51 =
—
348 +
—
45 —
274 +
—
31 +
—
324
—
313 217.9 —
133 +
—
133 +
—
319 +?
—
345
—
156
—
290 —
153 18.6 +
—
322 -
Zone 45
Star
Designation
Position
Rating
Map
Stein 1394
1137+5716
5M
4
Alpha UMa
1104+6145
5D
1
OS 235
1132+6105
5D
3
Component
A
B
A
B
A
B
C
Specifications
Mag
Sep from A
11.19
—
11.50
8.7
1.81
—
4.91
0.5 5.46
—
7.36
0.6 +
11.30
196.8
PA from A
—
187
—
226 —
318 +
196.8
Deep Sky Objects
Object
NGC 3587
IC 694
NGC 3982
NGC 3998
NGC 3642
NGC 3990
NGC 3610
NGC 3613
NGC 3674
NGC 3898
NGC 3945
NGC 3556
NGC 3838
NGC 3683
NGC 3690
NGC 3770
NGC 3796
NGC 3958
Position
1115+5501
1129+5834
1157+5508
1158+5527
1122+5905
1158+5528
1118+5847
1119+5800
1126+5703
1149+5605
1153+6041
1112+5540
1144+5757
1128+5653
1129+5833
1138+5937
1141+6018
1155+5822
Rating
2E
4E
5E
3M
4M
4M
5M
5M
5M
5M
5M
4D
4D
5D
5D
5D
5D
5D
Map
2
2
4
4
2
4
2
2
2
4
3
2
4
2
2
3
3
4
Type
Pn (3a)
Gal (SBm)
Gal (Sb)
Gal (SA(r)0o?)
Gal (Sc)
Gal (S0-:)
Gal (E4)
Gal (E5)
Gal (S0)
Gal (SA(s)ab)
Gal (SB(rs)0+)
Gal (Sc)
Gal (SA0/a?)
Gal (Sc)
Gal (S pec)
Gal (SBa)
Gal (S?)
Gal (SB(s)a)
- 32 -
Specifications
Surface
Mag
Br
11.0
11.8
11.3
11.8
12.4
11.6
12.7
11.9
14.6
12.6
12.5
11.6
13.2
11.7
12.8
12.2
11.8
11.9
12.5
11.9
14.0
10.8
13.0
12.3
11.8
12.4
12.6
12.1
13.1
12.9
12.2
12.5
12.4
13.0
12.4
Population