Zone 141, Master Map
Normal View
Zone Master, Normal View, 10 deg FOV
+24°00'
Leo Minor
c
+22°00'
e
d
+16°00'
f
Zosma
+18°00'
δ
+20°00'
Copeland's Septet
θ
Chertan
Denebolaβ
12h 00m
11h 52m
11h 44m
11h 36m
11h 28m
11h 20m
11h 12m
11h 04m
10h 56m
Zone 141, Map 1
Normal Image
+25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+24°00'
Leo Minor
+23°00'
NGC 3701
Hipparcos 1586
Weisse 26
STF 1537
δ
Zosma
Delta Leo
NGC 3646
11h 30m
11h 25m
11h 20m
STF 1517
11h 15m
11h 10m
11h 05m
11h 00m
+21°00'
+22°00'
STF 1531
Zone 141, Map 1
Mirror Image
Leo Minor
+23°00'
NGC 3701
+22°00'
STF 1531
+21°00'
Hipparcos 1586
Weisse 26
Delta Leoδ
STF 1537
Zosma
NGC 3646
STF 1517
11h 00m
+24°00'
+25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
11h 05m
11h 10m
11h 15m
11h 20m
11h 25m
11h 30m
Zone 141, Map 2
Normal Image
NGC 3646
+20°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+19°00'
STF 1517
NGC 3626
STF 1534
NGC 3608
NGC 3605
+18°00'
Kustner 38
NGC 3507
NGC 3501
NGC 3599
NGC 3607
+17°00'
NGC 3686
NGC 3684
NGC 3691
A 2379
LDS 917
Jonckheere 427
θ
Theta Leo
Chertan
NGC 3596
11h 30m
11h 25m
11h 20m
11h 15m
11h 10m
11h 05m
11h 00m
+16°00'
NGC 3655
81 Leo
Zone 141, Map 2
Mirror Image
NGC 3646
Kustner 38
+18°00'
NGC 3599NGC 3608
NGC 3605 NGC 3607
NGC 3507
NGC 3501
NGC 3626
STF 1534
NGC 3686
NGC 3684
NGC 3691
A 2379
LDS 917
NGC 3655
+16°00'
81 Leo
Jonckheere 427
Theta Leoθ
NGC 3485
11h 00m
+17°00'
STF 1517
+19°00'
+20°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Chertan
NGC 3596
11h 05m
11h 10m
11h 15m
11h 20m
11h 25m
11h 30m
Zone 141, Map 3
Normal Image
NGC 4022
+25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
OS 239 rej
NGC 3815
h512
+24°00'
Pourteau 3118
+23°00'
STF 1549
+22°00'
h2576
Copeland's Septet
STF 1582
Hussey 888
+21°00'
STF 1558
STF 1566
Hough 534
STF 1577
93 Leo
Sh 130
NGC 3837
NGC 3886
12h 00m
11h 55m
11h 50m
11h 45m
11h 40m
11h 35m
11h 30m
Zone 141, Map 3
Mirror Image
NGC 4022
OS 239 rej
+25°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 3815
h512
Pourteau 3118
+24°00'
STF 1549
+23°00'
NGC 3701
Copeland's Septet
+22°00'
h2576
STF 1582
+21°00'
STF 1558
STF 1566Hussey 888
STF 1577
93 Leo
NGC 3837
11h 30m
11h 35m
11h 40m
11h 45m
Sh 130
NGC 3886
11h 50m
11h 55m
12h 00m
Zone 141, Map 4
Normal Image
+20°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
93 Leo
Sh 130
NGC 3837
NGC 3886
NGC 3834
+19°00'
OSS 112
STF 1565
NGC 3827
h511
+18°00'
Barton 2412
+17°00'
Couteau 26
Kustner 41
NGC 4014
+16°00'
90 Leo
Barton 1275
Barton 1274
Sh 132
12h 00m
11h 55m
11h 50m
11h 45m
11h 40m
11h 35m
11h 30m
Zone 141, Map 4
Mirror Image
+20°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
93 Leo
NGC 3837
Sh 130
NGC 3886
+19°00'
OSS 112
NGC 3834
STF 1565
h511
NGC 3827
+18°00'
Barton 2412
+17°00'
Couteau 26
Kustner 41
90 Leo
+16°00'
Barton 1275
Barton 1274
Sh 132
11h 30m
11h 35m
11h 40m
11h 45m
11h 50m
11h 55m
12h 00m
Zone 141
Index
1 Reference Star, 34 Double Stars, 19 Galaxies
Flamsteed
NGC 3605 ............................................ 14
NGC 3607 ............................................ 10
NGC 3608 ............................................ 11
NGC 3626 ............................................ 13
NGC 3646 .............................................. 7
NGC 3655 ............................................ 13
NGC 3684 ............................................ 15
NGC 3686 ............................................ 16
NGC 3691 ............................................ 12
NGC 3701 .............................................. 7
NGC 3815 ............................................ 22
NGC 3827 ............................................ 27
NGC 3834 ............................................ 28
NGC 3837 ............................................ 28
NGC 3886 ............................................ 29
NGC 4014 ............................................ 27
81 Leo .................................................... 8
90 Leo .................................................. 26
93 Leo .................................................. 18
A
A 2379 ................................................... 9
B
Barton 1274 ......................................... 26
Barton 2412 ......................................... 25
D
Delta Leo ............................................... 5
H
h511 ..................................................... 25
h512 ..................................................... 19
Hipparcos 1586...................................... 3
Hough 534 ........................................... 20
Hussey 888 .......................................... 21
O
OSS 112 ............................................... 24
S
K
Sh 130 .................................................. 18
Sh 132 .................................................. 23
STF 1517................................................ 4
STF 1531................................................ 4
STF 1534.............................................. 10
STF 1537................................................ 5
STF 1549.............................................. 17
STF 1558.............................................. 21
STF 1565.............................................. 23
Kustner 41............................................ 24
L
LDS 917................................................. 9
N
NGC 3501............................................ 14
NGC 3507............................................ 12
NGC 3599............................................ 15
-1-
Zone 141
T
STF 1566 ............................................. 20
STF 1577 ............................................. 19
STF 1582 ............................................. 17
Theta Leo ............................................... 8
W
Weisse 26............................................... 3
-2-
Zone 141
Zone 141, Map 1
Double Stars
Easy
Weisse 26
Rating: 4 E
ADS B5641; HD 95436; SAO 81627
Position: 1102+2106
A
B
Magnitude
9.40
9.96
Separation PA
—
—
14.3 +
174 =
Year
—
1991
Spectra
F5
Colors
W
W
Notes:
1893: 14.2 @ 174. 14 measurements. The stars share common proper motion.
Observations:
C8 at 104x.
Hipparcos 1586
Rating: 4 E
HD 96497; SAO 81677
Position: 1108+2203
A
B
Magnitude
8.22
11.27
Separation PA
—
—
11.7 -! 249 +
Year
—
1991
Notes:
1 measurement.
A 1955.228 digitized sky survey plate shows 19.8 @ 240.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.70 inches.
Separation: AB = 3.14 miles.
Distance (LY): 172
Total luminosity (Suns): 1.26
-3-
Spectra
G1 V
Colors
Y
bW
Zone 141
STF 1531
Rating: 4 E
HD 98574; SAO 81783
Position: 1121+2253
A
B
Magnitude
9.28
10.52
Separation PA
—
—
23.3 +
167 =
Year
—
1991
Spectra
G5
Colors
Y
O
Notes:
1829: 23.1 @ 167. 14 measurements.
Observations:
C8 at 104x. It forms a triangle with two 9m stars.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.9 inches.
Separation: AB = 7.38 miles.
Distance (LY): 203
Total luminosity (Suns): 0.8
Difficult
STF 1517
Bur 1431 (C); ADS 8094; HD 97561; SAO 81725
Position: 1114+2008
A
B
C
Magnitude
6.93
6.95
10.79
Separation
—
0.5 236 +!
PA
—
318 +!
99 -
Rating: 4 D
Year
—
1998
1988
Spectra
G5 V
Colors
Y
?
W?
Notes:
AB 1829: 1.1 @ 288. Over 100 measurements. Alternate spectral types G5 III, G7
IV. Slightly variable.
AC 1871: 198.7 @ 104. 5 measurements.
Observations:
C11 at 634x.
-4-
Zone 141
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.00 inches.
Separation: AB = 686 feet; AC = 61.5 miles.
Distance (LY): 167
Total luminosity (Suns): 7.53
STF 1537
Rating: 4 D
ADS 8149; HD 99121; SAO 81805
Position: 1125+2037
A
B
Magnitude
8.26
9.60
Separation PA
—
—
2.2 358 +
Year
—
1997
Spectra
G0
Colors
W
B
Notes:
1831: 2.4 @ 356. 46 measurements.
Observations:
C8 at 206x. Webb saw them both as W.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.2 inches.
Separation: AB = 5,069 feet.
Distance (LY): 281
Total luminosity (Suns): 5.6
Delta Leo
Rating: 5 D
68 Leo; Zosma, "the girdle"; OS 573; Bur 1282; HD 97603; SAO 81727
Position: 1115+2031
A
B
a
Magnitude
2.56
10.92
13.76
Separation
—
201.3 +!
95.4 =
PA
—
343 41 -
Year
—
1988
1911
Spectra
A3 V
Colors
gW
bW
No
Notes:
AB 1850: 180.0 @ 346. 11 measurements.
Aa 1879: 95.4 @ 44. 2 measurements.
This star is a member of the Sirius Group and may be a Delta Scuti variable. It rotates
at 181 kps. It is also an infra-red source.
-5-
Zone 141
From James Kaler's Star Notes:
Zosma is a transliteration of the wrong word, the correct one meaning "hip" or "back."
The alternative name, Duhr, is more direct, and comes from an Arabic phrase that
specifically means "the Lion's back."
Zosma is one of the family of numerous white class A stars that flock the sky and
make such a great part of the constellations. It has a surface temperature of 8,350
Kelvin). Tthe radius may be only about double that of the Sun.
Though a seemingly ordinary main sequence (hydrogen fusing) dwarf like the Sun,
Zosma has, like any other star, interesting things to recommend it. First, it is a fairly rapid
rotator, spinning at a speed of at least 180 kilometers per second at its equator, 90 times
solar, giving it a rotational period of less than half a day. Second, it is suspected to be a
variable, of a kind called a "Delta Scuti star." These vibrate like subtle Cepheids (of
which Mekbuda in Gemini is an example). Zosma's pulsations, however, are greatly
suppressed by the natural stability of the main (hydrogen fusing) sequence. Third, it is
part of a set of stars that surround us called the "Ursa Major Stream," all of which
(including Sirius) share a common motion across the sky. Their physical relation is
unclear. Fourth, unlike its neighbor Denebola, Zosma appears to have no surrounding
dusty cloud that might be suspected of harboring planets. Finally, Zosma is so well
studied that astronomers actually have an age for it. From its current luminosity and
temperature (as well as other properties), it is between 600 and 750 million years old. Its
mass of 2.2 solar masses allow a total hydrogen-fusing age of around a billion years (a
tenth that of the Sun), so Zosma is well over half way toward beginning its death process,
when its then-helium core will contract and its outer layers will expand, making it into an
orange giant.
Observations:
C8 at 104x.
C11 at 115x. B was difficult in the glare.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.1 inches.
Separation: AB = 18.2 miles.
Distance (LY): 58
Total luminosity (Suns): 24.02
-6-
Zone 141
Deep Sky Objects
Moderate
NGC 3646
Other Names: UGC 6376; H III 15
Astronomical League Program: Herschel II Club
Rating: 5 M
Position: 1122+2010
Type: Gal
Surface brightness: 13.1
Class: SA(r)bc pec
Dimensions: 3.5' x 2'
Magnitude: 11.8
PA: 50
Notes:
Each second, the expansion of the universe takes it as far from you as Los Angeles is
from New York City.
This galaxy produced supernova 1989N (type II) and 1999cd (also type II).
Observations:
C8 at 104x. It has a large halo and smaller nucleus, flanked by two 10m stars. Its
axis runs NE-SW.
C11 at 98x. The halo stands out pretty well, and the nucleus is nearly stellar.
Model (where the Sun is a baseball):
Its diameter would be 91 million miles.
Distance (LY): 277,000,000
Radial velocity (km/sec): +4,341
Luminosity (suns): 114,000,000,000
Difficult
NGC 3701
Other Names: H II 349; UGC 6493
Rating: 4 D
Position: 1129+2405
Type: Gal
Surface brightness: 13.2
Class: Sbc
Dimensions: 2.0' x 0.9'
-7-
Magnitude: 12.9
PA: 145
Zone 141
Observations:
C8 at 104x. Extremely faint oval blur without a sharp nucleus. Nice field 30 min W.
Radial velocity (km/sec): +2,806
Zone 141, Map 2
Reference Star
Theta Leo (70 Leo; Chertan; HD 97633; SAO 99512)
Position: 1114+1526
Mag : 3.3
Spectrum : A2 V Color : W
Assumed distance: 178 light years
Assumed luminosity (suns): 120
Double Stars
Easy
81 Leo
h4433; HD 99285; SAO 99601
Position: 1126+1627
A
B
Magnitude
5.57
9.20
Rating: 4 E
Separation PA
—
—
54.5 1 +!!
Year
—
1992
Notes:
1840: 58.5 @ 339. 13 measurements.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.10 inches.
Separation: AB = X13.1 miles.
Distance (LY): 154
Total luminosity (Suns): 11.2
-8-
Spectra
F2 V
Colors
yW
W
Zone 141
LDS 917
Position: 1102+1631
A
B
Magnitude
11.35
11.64
Rating: 5 E
Separation PA
—
—
18.7 +
282 -
Year
—
1991
Spectra
Colors
W
W
Notes:
1895: 18.2 @ 284. 3 measurements.
Observations:
C11 at 115x.
Distance (LY): 56
Total luminosity (Suns): 0.012
Moderate
A 2379
Rating: 4 M
ADS 8120
Position: 1118+1636
A
B
Magnitude
9.90
10.23
Separation PA
—
—
28.7 50 -
Year
—
1962
Spectra
Colors
bW
pO
Notes:
1911: 29.5 @ 52. 3 measurements. May be optical because Hipparcos gives
different distances (87 and 46 light years).
B has a 9.6m companion at 0.3 @ 20 (1996).
Observations:
C8 at 104x.
-9-
Zone 141
Difficult
STF 1534
Rating: 2 D
ADS 8140; HD 98736; SAO 99573
Position: 1122+1812
A
B
Magnitude
7.93
10.93
Separation PA
—
—
5.2 +
317 -
Year
—
1991
Spectra
K6
Colors
O!
B!
Notes:
1828: 4.8 @ 342. 63 measurements.
Observations:
C8 at 516x. An easy split, but B is very difficult.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 34.4 inches.
Separation: AB = 4,382 feet.
Distance (LY): 103
Total luminosity (Suns): 0.62
Deep Sky Objects
Easy
NGC 3607
Other Names: UGC 6297; H II 50
Astronomical League Program: Herschel 400 Club
Rating: 2 E
Position: 1117+1803
Type: Gal
Surface brightness: 12.9
Class: SA(s)0o:
Dimensions: 1.5' x 1.3'
Magnitude: 11.2
PA: 120
Notes:
Leo I Cloud member. It may have recently interacted with NGC 3608.
It is also very close (36,000 light years) to NGC 3605.
- 10 -
Zone 141
Observations:
C8 at 83x. Very bright and easy, it has a stellar nucleus.
C11 at 193x. Very bright and large, it gets gradually brighter to the middle, which is
much brighter all of a sudden, but not quite stellar.
Model (where the Sun is a baseball):
Its diameter would be 6 million miles.
Distance (LY): 46,000,000
Radial velocity (km/sec): +935
Luminosity (suns): 5,500,000,000
NGC 3608
Other Names: UGC 6299; H II 51
Astronomical League Program: Herschel 400 Club
Rating: 3 E
Position: 1117+1809
Type: Gal
Surface brightness: 12.6
Class: E3
Dimensions: 3' x 2.5'
Magnitude: 12.2
PA: 75
Notes:
Leo Group member.
Unusual motion in the stars in the outer envelope of the galaxy suggest a near
encounter (but not merger) with another galaxy.
Observations:
C8 at 83x. Very small; it shows a nearly starlike nucleus and E-W halo.
C11 at 193x. Smaller than NGC 3607, it very gradually brightens to the center, but is
not quite stellar at the nucleus.
Model (where the Sun is a baseball):
Its diameter would be 19 million miles.
Distance (LY): 67,000,000
Radial velocity (km/sec): +1,235
Luminosity (suns): 4,600,000,000
- 11 -
Zone 141
Moderate
NGC 3507
Other Names: H IV 7; UGC 6123
Astronomical League Program: Herschel II Club
Rating: 3 M
Position: 1104+1808
Type: Gal
Surface brightness: 13.0
Class: SB(s)b
Dimensions: 3.4' x 2.8'
Magnitude: 10.9
PA: 110
Observations:
C8 at 206x. An 11m star is superimposed. At first, I thought this galaxy was that
star, but closer examination showed a tiny halo around the star. It is flanked N and S by
10m stars. Moderately rich field.
Distance (LY): 38,000,000
Radial velocity (km/sec): +979
Total luminosity (Suns): 5,000,000,000
NGC 3691
Other Names: H II 54; UGC 6464
Rating: 3 M
Position: 1128+1655
Type: Gal
Surface brightness: 11.4
Class: SBb?
Dimensions: 1.1' x 0.9'
Magnitude: 11.8
PA: 15
Observations:
C8 at 104x. Stellar nucleus with very small halo.
Distance (LY): 39,000,000
Radial velocity (km/sec): +1,085
Total luminosity (Suns): 2,300,000,000
- 12 -
Zone 141
NGC 3626
Rating: 5 M
Other Names: UGC 6343; H II 52
Astronomical League Program: Caldwell Club, Herschel 400 Club
Position: 1120+1821
Type: Gal
Surface brightness: 12.5
Class: (R)SA(rs)0+
Dimensions: 2' x 1'
Magnitude: 11.4
PA: 175
Notes:
Leo I Cloud member, it is 190,000 light years in diameter, a true giant!
The gas in the arms is rotating in the opposite direction of the stars! This may be
evidence of a merger.
Observations:
C8 at 83x. Bright, but featureless at all powers, and with a stellar nucleus. It runs
NW-SE.
Model (where the Sun is a baseball):
Its diameter would be 6 million miles.
Distance (LY): 31,000,000
Radial velocity (km/sec): +1,362
Luminosity (suns): 2,100,000,000
NGC 3655
Other Names: H I 5; UGC 6396
Astronomical League Program: Herschel 400 Club
Rating: 5 M
Position: 1123+1635
Type: Gal
Surface brightness: 11.8
Class: SA(s)c: III-IV
Dimensions: 1.6' x 1.0'
Magnitude: 11.6
PA: 30
Notes:
This galaxy produced supernova 2002ji (type Ib or Ic).
Observations:
C8 at 104x. Small bright nucleus; a 10m star lies 7 min SE. It had a small halo. The
double 35 Leo is 35 min E.
Radial velocity (km/sec): +1,473
- 13 -
Zone 141
Difficult
NGC 3501
Other Names: UGC 6116
Rating: 4 D
Position: 1103+1759
Type: Gal
Surface brightness: 13.3
Class: Scd:
Dimensions: 3.8' x 0.5'
Magnitude: 12.9
PA: 27
Observations:
C8 at 206x. It took about 3 minutes of patient viewing before it slowly faded into
view– a most stunning effect! It looks like a ghostly spindle running roughly N-S.
Moderate field.
Radial velocity (km/sec): +1,130
NGC 3605
Other Names: UGC 6295; H III 27
Astronomical League Program: Herschel II Club
Rating: 4 D
Position: 1117+1801
Type: Gal
Surface brightness: 11.8
Class: E3
Dimensions: 1.7' x 1'
Magnitude: 13.0
PA: 17
Notes:
Leo II Group member.
Observations:
C8 at 83x. Shares the field with NGC 3607 and NGC 3608. This one is farthest S
and smallest and faintest. The axis runs N-S.
NGC 3607 lies to the E (it is the largest and brightest) and NGC 3608 is a little N.
NGC 3605 is somewhat round and mostly featureless.
Radial velocity (km/sec): +668
- 14 -
Zone 141
NGC 3599
Other Names: H II 49; UGC 6281
Astronomical League Program: Herschel II Club
Rating: 5 D
Position: 1115+1807
Type: Gal
Surface brightness: 13.8
Class: SA0:
Dimensions: 3' x 3'
Magnitude: 11.9
Observations:
C8 at 83x. Very low surface brightness disk about 2 min N of a 13m star. No
features seen.
C11 at 193x. Very very faint without much brightening. No details.
Radial velocity (km/sec): +835
NGC 3684
Other Names: UGC 6453
Rating: 5 D
Position: 1127+1702
Type: Gal
Surface brightness: 13.3
Class: SA(rs)bc II-III
Dimensions: 1.4' x 1'
Magnitude: 12.4
PA: 130
Observations:
C8 at 83x. Very faint and running NW-SE, with a slightly brighter nucleus.
Model (where the Sun is a baseball):
Its diameter would be 9 million miles.
Distance (LY): 66,000,000
Radial velocity (km/sec): +1,329
Luminosity (suns): 4,000,000,000
- 15 -
Zone 141
NGC 3686
Other Names: H III 28; UGC 6460; H II 160
Astronomical League Program: Herschel 400 Club
Rating: 5 D
Position: 1128+1713
Type: Gal
Surface brightness: 13.2
Class: SB(s)bc II
Dimensions: 2'
Magnitude: 12.0
PA: 15
Observations:
C8 at 65x. The galaxy is round with no obvious nucleus. An 11m star lies 3 min N.
Rich field.
Model (where the Sun is a baseball):
Its diameter would be 12 million miles.
Distance (LY): 65,000,000
Radial velocity (km/sec): +1,156
Luminosity (suns): 5,200,000,000
- 16 -
Zone 141
Zone 141, Map 3
Double Stars
Easy
STF 1582
Rating: 3 E
ADS 8352; HD 103628; SAO 82058
Position: 1156+2159
A
B
Magnitude
8.04
9.64
Separation PA
—
—
12.0 =
75 -
Year
—
1991
Spectra
F8 IV
F8
Colors
W
B
Notes:
1827: 12.0 @ 77. 22 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical. However, the stars exhibit common proper motion.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches; B = 16.4 inches.
Separation: AB = 6.61 miles.
Distance (LY): 353
Total luminosity (Suns): 7
STF 1549
Rating: 4 E
ADS 8204
Position: 1133+2419
A
B
Magnitude
9.49
11.16
Separation PA
—
—
13.0 113 -
Year
—
1991
Spectra
K0
Colors
Y
W
Notes:
1828: 14.0 @ 116. 22 measurements. The stars show similar proper motions.
- 17 -
Zone 141
Observations:
C8 at 104x. It lies 7 min E of an 8m Y star.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 26.5 inches.
Separation: AB = 1.56 miles.
Distance (LY): 77
Total luminosity (Suns): 0.12
Sh 130
Rating: 4 E
HD 102428; SAO 81994
Position: 1147+2002
A
B
Magnitude
7.36
9.89
Separation PA
—
—
74 28 +
Year
—
1918
Spectra
F5 Iab
G5
Colors
W
V
Notes:
Hipparcos/Tycho data show different distances for these stars (301 and 98 light
years); they may be optical. The stars have different proper motions.
1823: 77 @ 25.
Observations:
C8 at 104x.
93 Leo
DQ Leo; SI 7; HD 102509; SAO 81998
Position: 1148+2012
A
B
Magnitude
4.59
9.03
Rating: 4 E
Separation PA
—
—
74.5 +
356 =
Year
—
1991
Spectra
G4 III
A7 V
Colors
D!
B
Notes:
1836: 74.3 @ 356. 20 measurements.
Star A is a spectroscopic binary with a 71.70 day period, as well as an infra-red
source.
The stars share common proper motion.
- 18 -
Zone 141
Observations:
C8 at 83x. Webb saw them as Y and W, and wrote, "curious field."
C8 at 104x. I used a Celestron MicroGuide and measured 76" @ 355.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 37.5 inches; B = 6.75 inches.
Separation: AB = 26.4 miles; Aa = 9.06 feet.
Distance (LY): 227
Total luminosity (Suns): 65.6
STF 1577
Rating: 4 E
ADS 8334; SAO 82033
Position: 1153+2019
A
B
Magnitude
9.96
11.60
Separation PA
—
—
8.6 +
10 -
Year
—
1986
Spectra
F5
Colors
W
pO
Notes:
1828: 8.2 @ 11. 14 measurements.
Observations:
C11 at 115x.
h512
Rating: 4 E
SAO 82044
Position: 1154+2442
A
B
C
Magnitude
9.86
12.30
10.10
Separation
—
24.2 +
24.2 -
PA
—
154 336 +
Notes:
AB 1897: 19.7 @ 162. 2 measurements.
AC 1874: 28.8 @ 328. 10 measurements.
Observations:
C8 at 104x.
- 19 -
Year
—
1988
1991
Spectra
F8 V
Colors
W
No
W
Zone 141
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.60 inches.
Separation: AB = 12.5 miles; AC = 12.5 miles.
Distance (LY): 332
Total luminosity (Suns): 2
Hough 534
Rating: 4 E
ADS 8376
Position: 1159+2052
A
B
Magnitude
9.22
12.15
Separation PA
—
—
10.5 +
137 =
Year
—
1991
Spectra
F8
Colors
W
?
Notes:
1897: 9.8 @ 137. 11 measurements.
Observations:
C11 at 115x. This pair is the northeast vertex of a 10m triangle.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.1 inches.
Separation: AB = 5.03 miles.
Distance (LY): 307
Total luminosity (Suns): 1.61
Moderate
STF 1566
Rating: 5 M
ADS 8263; HD 101469; SAO 81940
Position: 1141+2102
A
B
Magnitude
8.75
10.13
Separation PA
—
—
2.4 350 +
Notes:
1829: 2.7 @ 349. 28 measurements.
- 20 -
Year
—
1998
Spectra
G5
Colors
W
?
Zone 141
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.3 inches.
Separation: AB = 3.10 miles.
Distance (LY): 830
Total luminosity (Suns): 37
Difficult
Hussey 888
Rating: 3 D
ADS 8275; HD 101770; SAO 81952
Position: 1143+2105
A
B
Magnitude
8.82
9.14
Separation PA
—
—
0.6 177 +
Year
—
1999
Spectra
F5
Colors
W
W
Notes:
1904: 0.7 @ 149. 40 measurements.
Observations:
C11 at 634x. I got a snowman at this power.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.7 inches.
Separation: AB = 1.13 miles.
Distance (LY): 1,210
Total luminosity (Suns): 60
STF 1558
Rating: 4 D
ADS 8238; HD 100869
Position: 1134+2145
A
B
C
Magnitude
9.92
10.24
8.80
Separation
—
1.2 43.5 -
PA
—
162 +
277 +
- 21 -
Year
—
1991
1985
Spectra
G5
Colors
W
W
W
Zone 141
Notes:
AB 1828: 1.4 @ 158. 34 measurements.
AC 1829: 43.7 @ 276. 24 measurements.
Observations:
C8 at 697x. At times, a figure 8, at other (brief) moments, AB barely split.
Deep Sky Objects
Difficult
NGC 3815
Other Names: H III 339; UGC 6654
Rating: 5 D
Position: 1142+2449
Type: Gal
Surface brightness: 13.3
Class: Sab
Dimensions: 1.9' x 1.0'
Observations:
C8 at 104x. A very faint glow with a sharp nucleus.
Radial velocity (km/sec): +3,711
- 22 -
Magnitude: 13.0
PA: 72
Zone 141
Zone 141, Map 4
Double Stars
Easy
STF 1565
Rating: 3 E
ADS 8257; HD 101302; SAO 99717
Position: 1140+1900
A
B
Magnitude
7.20
8.50
Separation PA
—
—
21.6 +
304 =
Year
—
1991
Spectra
F0 IV
F0 III
Colors
W
O
Notes:
1829: 21.5 @ 304. 44 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. However, the stars show similar proper
motion.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches; B = 10.8 inches.
Separation: AB = 20.9 miles.
Distance (LY): 620
Total luminosity (Suns): 52
Sh 132
Rating: 3 E
HD 103152; SAO 99840
Position: 1153+1526
A
B
C
Magnitude
6.84
9.80
11.50
Separation
—
39 =
90.8 -
PA
—
14 =
264 -
Year
—
1981
1922
Spectra
A2
Colors
W
rO
W?
Notes:
AB 1823: 38.9 @ 14. 18 measurements. The stars share common proper motion.
- 23 -
Zone 141
AC 1914: 90.5 @ 265. 2 measurements.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.53 inches.
Separation: AB = 20.5 miles; AC = 47.8 miles.
Distance (LY): 337
Total luminosity (Suns): 18.22
OSS 112
Rating: 3 E
HD 103432; SAO 99858
Position: 1155+1925
A
B
Magnitude
8.19
8.43
Separation PA
—
—
73.5 +
35 =
Year
—
1994
Spectra
G0
G5
Colors
W
W
Notes:
1875: 73.1 @ 35. 20 measurements.
The stars share a very large common proper motion.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.1 inches; B = 19.9 inches.
Separation: AB = 13.9 miles.
Distance (LY): 121
Total luminosity (Suns): 1.1
Kustner 41
Rating: 3 E
ADS 8351
Position: 1156+1654
A
B
Magnitude
9.99
10.02
Separation PA
—
—
5.4 +
69 -
Notes:
1895: 4.7 @ 70. 17 measurements.
- 24 -
Year
—
1991
Spectra
G0
G0
Colors
W
W
Zone 141
Observations:
C11 at 115x.
Barton 2412
Position: 1144+1831
A
B
Magnitude
9.42
9.64
Rating: 4 E
Separation PA
—
—
4.9 =
292 =
Year
—
1991
Spectra
K5
Colors
W
W
Notes:
1894: 4.9 @ 292. 4 measures.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 37.3 inches.
Separation: AB = 1.08 miles.
Distance (LY): 142
Total luminosity (Suns): 0.486
h511
Rating: 4 E
HD 102927; SAO 99828
Position: 1151+1851
A
B
Magnitude
9.02
11.73
Separation PA
—
—
34.0 246 =
Year
—
1989
Notes:
1911: 35.0 @ 246. 3 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 25.8 inches.
Separation: AB = 42.4 miles.
Distance (LY): 800
Total luminosity (Suns): 11
- 25 -
Spectra
K0
Colors
Y
?
Zone 141
Moderate
90 Leo
STF 1552; ADS 8220; HD 100600; SAO 99673
Position: 1135+1647
A
B
C
Magnitude
5.95
7.06
8.70
Separation
—
3.4 62.1 -
PA
—
209 +
236 +
Rating: 2 M
Year
—
1997
1959
Spectra
B3 V
B6
F
Colors
W
W
B
Notes:
AB 1820: 4.5 @ 206. Over 100 measurements. The stars share common proper
motion.
AC 1822: 63.1 @ 234. 31 measurements.
Star B is a spectroscopic binary and rotates at 117 kps.
Observations:
C8 at 206x. Webb saw them as W and bW.
Barton 1274
Position: 1141+1536
A
B
Magnitude
10.72
11.01
Rating: 4 M
Separation PA
—
—
2.9 +
328 +
Notes:
1933: 2.7 @ 327. 4 measurements.
Observations:
C11 at 193x.
- 26 -
Year
—
1999
Spectra
F8
Colors
W
W
Zone 141
Deep Sky Objects
Moderate
NGC 3827
Other Names: UGC 6673
Rating: 4 M
Position: 1143+1851
Type: Gal
Surface brightness: 12.7
Class: Sa
Dimensions: 54" x 48"
Magnitude: 13.3
PA: 65
Observations:
C11 at 140x. Very starklike nucleus without a halo. A 9.1m star lies 5 min S.
Radial velocity (km/sec): +3,132
NGC 4014
Other Names: NGC 4028; UGC 6961
Rating: 4 M
Position: 1159+1611
Type: Gal
Surface brightness: 13.3
Class: S0/a
Dimensions: 2.2' x 1.3'
Magnitude: 12.3
PA: 120
Observations:
C11 at 140x. A ghostly oval patch that forms an isosceles triangle with two field stars
(10m, 12m).
Radial velocity (km/sec): +3,763
- 27 -
Zone 141
Difficult
NGC 3837
Other Names: UGC 6701
Rating: 4 D
Position: 1144+1954
Type: Gal
Surface brightness: 12.2
Class: E
Dimensions: 36"
Magnitude: 13.3
Notes:
Member of the large galaxy cluster Abell 1367.
Observations:
C11 at 140x. Fuzzy stellar nucleus and no halo. Very stellar at first glance.
Radial velocity (km/sec): +6,130
NGC 3834
Other Names: PGC 36443
Rating: 5 D
Position: 1144+1905
Type: Gal
Surface brightness: 13.6
Class: S0
Dimensions: 1.4' x 1'
Magnitude: 13.4
PA: 130
Notes:
This galaxy produced supernova 1968F.
Observations:
C11 at 140x. Very, very faint and small round patch with no noticeable nucleus. A
12m star lies 8 min NE.
Radial velocity (km/sec): +6,824
- 28 -
Zone 141
NGC 3886
Other Names: UGC 6760
Rating: 5 D
Position: 1147+1950
Type: Gal
Surface brightness: 13.0
Class: S0-:
Dimensions: 1.2' x 0.9'
Magnitude: 13.1
PA: 132
Observations:
C11 at 140x. Small, very faint blip without a nucleus. Two field stars (11m, 12m)
point right at it.
Radial velocity (km/sec): +5,767
- 29 -
Zone 141
Zone 141 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
STF 1565
1140+1900
3E
4
Sh 132
1153+1526
3E
4
OSS 112
1155+1925
3E
4
Kustner 41
1156+1654
3E
4
STF 1582
1156+2159
3E
3
Weisse 26
Hipparcos
1586
1102+2106
4E
1
1108+2203
4E
1
STF 1531
1121+2253
4E
1
81 Leo
1126+1627
4E
2
STF 1549
1133+2419
4E
3
Barton 2412
1144+1831
4E
4
Sh 130
1147+2002
4E
3
93 Leo
1148+2012
4E
3
h511
1151+1851
4E
4
STF 1577
1153+2019
4E
3
h512
1154+2442
4E
3
Hough 534
1159+2052
4E
3
LDS 917
1102+1631
5E
2
90 Leo
1135+1647
2M
4
A 2379
1118+1636
4M
2
Barton 1274
1141+1536
4M
4
STF 1566
1141+2102
5M
3
Component
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
C
A
B
A
B
A
B
- 30 -
Mag
7.20
8.50
6.84
9.80
11.50
8.19
8.43
9.99
10.02
8.04
9.64
9.40
9.96
8.22
11.27
9.28
10.52
5.57
9.20
9.49
11.16
9.42
9.64
7.36
9.89
4.59
9.03
9.02
11.73
9.96
11.60
9.86
12.30
10.10
9.22
12.15
11.35
11.64
5.95
7.06
8.70
9.90
10.23
10.72
11.01
8.75
10.13
Separation
—
21.6 +
—
39 =
90.8 —
73.5 +
—
5.4 +
—
12.0 =
—
14.3 +
—
11.7 -!
—
23.3 +
—
54.5 —
13.0 —
4.9 =
—
74 —
74.5 +
—
34.0 —
8.6 +
—
24.2 +
24.2 —
10.5 +
—
18.7 +
—
3.4 62.1 —
28.7 —
2.9 +
—
2.4 -
PA
—
304 =
—
14 =
90.8 —
35 =
—
69 —
75 —
174 =
—
249 +
—
167 =
—
1 +!!
—
113 —
292 =
—
28 +
—
356 =
—
246 =
—
10 —
154 24.2 —
137 =
—
282 —
209 +
62.1 —
50 —
328 +
—
350 +
Zone 141
Designation
Position
Rating
Map
STF 1534
1122+1812
2D
2
Hussey 888
1143+2105
3D
3
STF 1517
1114+2008
4D
1
STF 1537
1125+2037
4D
1
STF 1558
1134+2145
4D
3
Delta Leo
1115+2031
5D
1
Component
A
B
A
B
A
B
C
A
B
A
B
C
A
B
a
Mag
7.93
10.93
8.82
9.14
6.93
6.95
10.79
8.26
9.60
9.92
10.24
8.80
2.56
10.92
13.76
Separation
—
5.2 +
—
0.6 —
0.5 236 +!
—
2.2 —
1.2 43.5 —
201.3 +!
95.4 =
PA
—
317 —
177 +
—
318 +!
236 +!
—
358 +
—
162 +
43.5 —
343 41 -
Deep Sky Objects
Object
NGC 3607
NGC 3608
NGC 3507
NGC 3691
NGC 3827
NGC 4014
NGC 3626
NGC 3646
NGC 3655
NGC 3501
NGC 3605
NGC 3701
NGC 3837
NGC 3599
NGC 3684
NGC 3686
NGC 3815
NGC 3834
NGC 3886
Position
1117+1803
1117+1809
1104+1808
1128+1655
1143+1851
1159+1611
1120+1821
1122+2010
1123+1635
1103+1759
1117+1801
1129+2405
1144+1954
1115+1807
1127+1702
1128+1713
1142+2449
1144+1905
1147+1950
Rating
2E
3E
3M
3M
4M
4M
5M
5M
5M
4D
4D
4D
4D
5D
5D
5D
5D
5D
5D
Map
2
2
2
2
4
4
2
1
2
2
2
1
4
2
2
2
3
4
4
Type
Gal (SA(s)0o:)
Gal (E3)
Gal (SB(s)b)
Gal (SBb?)
Gal (Sa)
Gal (Sa)
Gal ((R)SA(rs)0+)
Gal (Ring I-II)
Gal (SA(s)c: III-IV)
Gal (Scd:)
Gal (E3)
Gal (Sbc)
Gal (E)
Gal (SA0:)
Gal (SA(rs)bc II-III)
Gal (SB(s)bc II)
Gal (Sa)
Gal (S)
Gal (S0-:)
- 31 -
Specifications
Surface
Mag
Br
11.2
12.9
12.2
12.6
10.9
13.0
11.8
11.4
13.3
12.7
12.3
13.3
11.4
12.5
11.8
13.1
11.6
11.8
12.9
13.3
13.0
11.8
12.9
13.2
13.3
12.2
11.9
13.8
12.4
13.3
12.0
13.2
13.0
13.3
13.4
13.6
13.1
13.0
Population