Zone 189, Master Map
+06°00'
Normal View
Zone Master, Normal View, 10 deg FOV
+04°00'
σ
e
+02°00'
c
Zavijava
+00°00'
β
τ
f
-02°00'
υ
d
12h 00m
11h 52m
11h 44m
11h 36m
11h 28m
11h 20m
-04°00'
φ
11h 12m
11h 04m
Zone 189, Map 1
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+05°00'
STF 1518
+04°00'
NGC 3611
h1189
NGC 3495
STF 1504
STF 1500
83 Leo
Tau Leo
Baillaud 2381 NGC 3630
STF 1526
AG 173
+02°00'
τ
H V 68
NGC 3640
Bur 340
+03°00'
NGC 3664
+01°00'
Baillaud 532
STF 1535
Baillaud 1158
NGC 3521
11h 30m
11h 25m
11h 20m
11h 15m
11h 10m
11h 05m
11h 00m
Zone 189, Map 1
Mirror Image
+05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
h1189
STF 1504
STF 1500 STF 1500
NGC 3640
A. G. 173
NGC 3630
AG 173
Baillaud 2381
+02°00'
STF 1526
83 Leo
Tau Leoτ
+03°00'
NGC 3664
H V 68
Baillaud 532
STF 1535
+01°00'
NGC 3495
+04°00'
NGC 3611
Baillaud 1158
NGC 3521
11h 00m
11h 05m
11h 10m
11h 15m
11h 20m
11h 25m
11h 30m
Zone 189, Map 2
Normal Image
+00°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 3521
Baillaud 1156
-01°00'
Baillaud 864
NGC 3662
Baillaud 530
Baillaud 532
STF 3071 rej
-02°00'
STF 1529
STF 3069 rej
-03°00'
h178
-04°00'
Phi Leo φ
STF 1548
Jonckheere 748
STF 1506
STF 3070
Jonckheere 1572
h2573
11h 30m
11h 25m
11h 20m
11h 15m
11h 10m
11h 05m
11h 00m
Zone 189, Map 2
Mirror Image
+00°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
NGC 3521
Baillaud 864
NGC 3662
STF 1529
-02°00'
STF 3069 rej
Baillaud 532
Baillaud 530
-01°00'
Baillaud 1156
-03°00'
h178
Phi Leo
-04°00'
φ
Jonckheere 748
STF 1506
STF 3070
Jonckheere 1572
11h 00m
11h 05m
11h 10m
11h 15m
11h 20m
11h 25m
11h 30m
Zone 189, Map 3
Normal Image
+05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+04°00'
h1193
h1196
STF 1578
h1203
+02°00'
+03°00'
STF 1580
Beta Vir β
Zavijava
+01°00'
A. G. 175
STF 1568
h1194
12h 00m
11h 55m
11h 50m
11h 45m
11h 40m
11h 35m
11h 30m
Zone 189, Map 3
Mirror Image
+05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+04°00'
h1193
h1196
+03°00'
STF 1578
h1203STF 1580
β
+02°00'
Bur 340
Beta Vir
Zavijava
+01°00'
A. G. 175
STF 1568
h1194
11h 30m
11h 35m
11h 40m
11h 45m
11h 50m
11h 55m
12h 00m
Zone 189, Map 4
Normal Image
+00°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
h1194
Jonckheere 1015
-01°00'
υ
-02°00'
NGC 4030
Baillaud 537
Baillaud 1881
STF 1560
-03°00'
Baillaud 2180
h189
-04°00'
Gauchet 13
STF 1584
h190
h2573
STF 3076
12h 00m
11h 55m
11h 50m
11h 45m
11h 40m
11h 35m
11h 30m
Zone 189, Map 4
Mirror Image
+00°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
h1194
Jonckheere 1015
-02°00'
-01°00'
υ
Baillaud 537
Baillaud 1881
STF 1560
-03°00'
Baillaud 2180
h189
-04°00'
Gauchet 13
STF 1584
h190
h2573
STF 3076
11h 30m
11h 35m
11h 40m
11h 45m
11h 50m
11h 55m
12h 00m
Zone 189
32 Double Stars, 7 Galaxies
Flamsteed
NGC 3611 ................................................... 9
NGC 3630 ................................................... 7
NGC 3640 ................................................... 7
NGC 3664 ................................................... 8
83 Leo ......................................................... 2
A
A. G. 173..................................................... 2
A. G. 175................................................... 19
P
B
Phi Leo ...................................................... 11
Baillaud 2180 ............................................ 22
Baillaud 530 .............................................. 12
Baillaud 532 .............................................. 14
Beta Vir..................................................... 17
Bur 340........................................................ 5
S
Jonckheere 1572........................................ 11
STF 1500..................................................... 6
STF 1504..................................................... 6
STF 1506................................................... 10
STF 1526..................................................... 4
STF 1529..................................................... 9
STF 1535..................................................... 5
STF 1548................................................... 12
STF 1560................................................... 20
STF 1568................................................... 18
STF 1578................................................... 18
STF 1580................................................... 16
STF 1584................................................... 21
STF 3069 rej ............................................. 13
STF 3070................................................... 13
STF 3071 rej ............................................. 14
N
T
NGC 3495 ................................................... 8
NGC 3521 ................................................. 15
Tau Leo ....................................................... 4
H
H V 68......................................................... 3
h1193......................................................... 19
h1196......................................................... 19
h1203......................................................... 16
h190........................................................... 22
h2573......................................................... 21
J
-1-
Zone 189
Zone 189, Map 1
Double Stars
Easy
A. G. 173
Rating: 3 E
ADS 8017
Position: 1101+0258
A
B
Magnitude
9.33
9.87
Separation PA
—
—
2.1 +
127 =
Year
—
1991
Spectra
G5
Colors
Y
W
Notes:
1902: 1.8 @ 127. 18 measurements.
Observations:
C11 at 193x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.9 inches.
Separation: AB = 1.12 miles.
Distance (LY): 343
Total luminosity (Suns): 2.74
83 Leo
STF 1540; ADS 8162; HD 99491; SAO 118864
Rating: 3 E
Position: 1127+0300
A
B
C
Magnitude
6.49
7.58
9.90
Separation
—
28.6 90.5 -
PA
—
150 187 -
-2-
Year
—
1985
1937
Spectra
K0 IV
K5 V
Colors
W
O
B
Zone 189
Notes:
AB 1820: 30.0 @ 152. 93 measurements. The orbit takes 2,000 years. The A star
is a metal rich dwarf with a high abundance of iron. The stars share a very large common
proper motion.
AC 1936: 91.6 @ 191. 3 measurements.
Observations:
C8 at 83x. Webb saw them as yW and L, or Y and pV. Franks saw Y and R.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches; B = 33.4 inches.
Separation: AB = 2.58 miles; AC = 8.19 miles.
Distance (LY): 58
Total luminosity (Suns): 1.08
H V 68
Rating: 4 E
HD 96682; SAO 118683
Position: 1108+0314
A
B
C
BC
Magnitude
7.60
9.10
10.80
Separation PA
—
—
146.4 227 42.0 -
207 =
Year
—
1984
Spectra
K0
K5
Colors
yW
Y
No
1904
Notes:
AB 1899: 149.9 @ 229. 10 measurements. Hipparcos/Tycho mission data show
different distances for these stars; they may be optical.
BC 1 measurement.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 23.7; B = 36.6 inches.
Separation: AB = 228.46 miles.
Distance (LY): 1,000
Total luminosity (Suns): 118
-3-
Zone 189
STF 1526
Position: 1119+0249
A
B
Magnitude
9.10
10.33
Rating: 4 E
Separation PA
—
—
30.2 181 +
Year
—
1991
Spectra
G0
G0
Colors
W
W
Notes:
1828: 30.4 @ 180. 13 measurements. The stars share common proper motion.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.0 inches; B = 19.2 inches.
Separation: AB = 12.72 miles.
Distance (LY): 270
Total luminosity (Suns): 1.8
Tau Leo
84 Leo; SI 19; HD 99648; SAO 118875
Rating: 4 E
Position: 1128+0252
A
B
C
Magnitude
5.05
7.47
10.00
Separation
—
89.7 764.8 =
PA
—
180 +
92 =
Year
—
1994
1910
Spectra
G8 III
Colors
Y
bW
W
Notes:
AB 1834: 94.7 @ 170. 35 measurements. This star is a member of the Sirius Group
and an infra-red source. The stars have different proper motions.
AC 1875: 764.8 @ 92. 2 measurements.
Observations:
C8 at 83x. Some observers report yW and bW. Webb said Y and W.
C8 at 104x. I used the Celestron MicroGuide and measured 90.6" @ 180. It has
moved a little! D was not noted.
-4-
Zone 189
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 43.5 inches.
Separation: AB = 86.8 miles; AC = 740 miles.
Distance (LY): 620
Total luminosity (Suns): 346
STF 1535
Rating: 5 E
ADS 8144; HD 98902; SAO 118819
Position: 1123+0056
A
B
Magnitude
9.30
11.30
Separation PA
—
—
10.4 60 -
Year
—
1962
Spectra
G0
Colors
W
B
Notes:
1828: 10.5 @ 61. 11 measurements. The stars share common proper motion.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.2 inches.
Separation: AB = 1.68 miles.
Distance (LY): 104
Total luminosity (Suns): 0.225
Moderate
Bur 340
Rating: 4 M
ADS 8185; HD 99949; SAO 118894
Position: 1130+0311
A
B
Magnitude
7.52
10.62
Separation PA
—
—
4.4 +
11 +
Notes:
1876: 3.9 @ 7. 26 measurements.
-5-
Year
—
1991
Spectra
F8
Colors
yW
O
Zone 189
Observations:
C8 at 280x. This pair lies on the ecliptic.
Difficult
STF 1500
Rating: 5 D
ADS 8007; HD 95280; SAO 137933
Position: 1100+0328
A
B
Magnitude
7.94
8.33
Separation PA
—
—
1.4 +
303 -
Year
—
1999
Spectra
F8 V
Colors
W
B
Notes:
1825: 1.1 @ 331. Over 100 measurements.
Observations:
C8 at 697x. Peanut shape. Extremely difficult.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.60 inches.
Separation: AB = 2,112 feet.
Distance (LY): 186
Total luminosity (Suns): 3.9
STF 1504
Rating: 5 D
ADS 8043; HD 95899; SAO 118638
Position: 1104+0338
A
B
Magnitude
7.98
8.07
Separation PA
—
—
1.2 +
301 +
Notes:
1829: 1.1 @ 276. Over 100 measurements.
-6-
Year
—
1999
Spectra
F0
Colors
Y
Y
Zone 189
Observations:
C8 at 697x. Elongated to figure eight as the seeing varied.. This is a good test of the
scope and the seeing.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.4 inches.
Separation: AB = 1.59 miles.
Distance (LY): 850
Total luminosity (Suns): 120
Deep Sky Objects
Moderate
NGC 3630
Other Names: UGC 6349
Rating: 3 M
Position: 1120+0258
Type: Gal
Surface brightness: 11.9
Class: S0
Dimensions: 1.9' x 0.8'
Magnitude: 11.9
PA: 37
Observations:
C8 at 104x. Very bright nucleus, large halo. A 7.6m star lies 10 min SE.
Distance (LY): 60,000,000
Radial velocity (km/sec): +1,485
Total luminosity (Suns): 4,900,000,000
NGC 3640
Other Names: UGC 6368, H II 33
Astronomical League Program: Herschel 400 Club
Rating: 5 M
Position: 1121+0314
Type: Gal
Surface brightness: 13.5
Class: E3
Dimensions: 4.5' x 4'
-7-
Magnitude: 11.6
PA: 100
Zone 189
Observations:
C8 at 83x. Faint and plain. There is a bright, stellar nucleus. A shallow triangle of
faint stars lies nearby.
Distance (LY): 52,000,000
Radial velocity (km/sec): +1,198
Total luminosity (Suns): 4,900,000,000
Difficult
NGC 3495
Other Names: H III 498; UGC 6098
Rating: 4 D
Position: 1101+0338
Type: Gal
Surface brightness: 13.2
Class: Sd: III
Dimensions: 4.8' x 1.0'
Magnitude: 11.8
PA: 20
Observations:
C8 at 206x. 58 Leo (4.8m) lies just 10 min W and is a problem. Use high power to
get it out of the field. The galaxy has a soft, almost stellar nucleus set inside a faint cigar
oriented NNE to SSW. Moderate field.
Distance (LY): 36,000,000
Radial velocity (km/sec): +1,136
Total luminosity (Suns): 1,900,000,000
NGC 3664
Other Names: UGC 6419
Rating: 4 D
Position: 1124+0320
Type: Gal
Surface brightness: 13.7
Class: SB(s)m pec IV-V
Dimensions: 1.9' x 1.7'
Magnitude: 12.8
Observations:
C8 at 206x. It looks like a very faint, very small "star". No details. It is set inside a
large triangle of 10m stars. 82 Leo is 25 min E.
Model (where the Sun is a baseball):
Its diameter would be 14 million miles.
-8-
Zone 189
Distance (LY): 81,000,000
Radial velocity (km/sec): +1,382
Luminosity (suns): 4,000,000,000
NGC 3611
Other Names: UGC 6305, H II 521
Astronomical League Program: Herschel II Club
Rating: 5 D
Position: 1118+0433
Type: Gal
Surface brightness: 14.0
Class: SA(s)a pec
Dimensions: 1.2' x 0.8'
Magnitude: 12.6
Observations:
C8 at 83x. A faint, nearly stellar patch of light. Note the 10m star 3 min NE. This
galaxy lies on the ecliptic.
Distance (LY): 70,000,000
Radial velocity (km/sec): +1,602
Total luminosity (Suns): 3,500,000,000
Zone 189, Map 2
Double Stars
Easy
STF 1529
Rating: 2 E
ADS 8131; SAO 138129
Position: 1119-0139
A
B
Magnitude
6.61
7.39
Separation PA
—
—
9.5 254 +
Year
—
1991
Spectra
F8 IV
dG6
Colors
W
W
Notes:
1821: 10.2 @ 251. 66 measurements. The stars show a similar, but large, proper
motion.
-9-
Zone 189
Observations:
C8 at 83x. A great view! Webb saw them as yW and W and called it "a fine object.".
Very, very rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches; B = 19.1 inches.
Separation: AB = 2.68 miles.
Distance (LY): 181
Total luminosity (Suns): 6.1
STF 1506
A 676; ADS 8048; HD 96064; SAO 137978
Rating: 3 E
Position: 1105-0413
A
B
Magnitude
7.64
10.25
Separation PA
—
—
11.7 +
221 +
Year
—
1991
Spectra
G5
dM0
Colors
Y
O
Notes:
AB 1829: 10.4 @ 212. 33 measurements.
B has a tight companion; orbit computed; 23.6 year period, semi-major axis of 0.28",
direct motion.
Observations:
C8 at 104x. I used a Celestron MicroGuide on Feb. 28, 2000 (UT) and got 12.9" @
227. Appears to be moving.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.9 inches; B = 45.3 inches.
Separation: AB = 1.46 miles.
Distance (LY): 80
Total luminosity (Suns): 0.54
- 10 -
Zone 189
Phi Leo
74 Leo; Sh 121; HD 98058; SAO 138102
Rating: 3 E
Position: 1117-0339
A
B
Magnitude
4.45
9.75
Separation PA
—
—
88.9 -! 291 +
Year
—
1992
Spectra
A7 IVn
Colors
W
B
Notes:
1821: 106.2 @ 287. 12 measurements.
The primary is a shell star.
The stars have different proper motions.
Observations:
C8 at 104x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.20 inches.
Separation: AB = 27.1 miles.
Distance (LY): 195
Total luminosity (Suns): 48.6
Jonckheere 1572
Position: 1109-0442
A
B
Magnitude
10.37
10.50
Rating: 4 E
Separation PA
—
—
9.5 +
22 +
Notes:
1941: 6.0 @ 20. 2 measurements.
Observations:
C11 at 115x.
- 11 -
Year
—
1945
Spectra
Colors
W
W
Zone 189
STF 1548
Rating: 4 E
ADS 8200; HD 100245; SAO 138232
Position: 1129-0343
A
B
Magnitude
8.76
9.81
Separation PA
—
—
10.9 +
127 =
Year
—
1991
Spectra
K0
Colors
Y
B?
Notes:
1827: 10.4 @ 127. 32 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 = 25.4 inches.
Separation: AB = 5.90 miles.
Distance (LY): 347
Total luminosity (Suns): 1.37
Baillaud 530
Rating: 5 E
HD 95245; SAO 137932
Position: 1100-0200
A
B
Magnitude
9.08
11.10
Separation PA
—
—
11.0 253 +
Year
—
1991
Spectra
F0
Colors
W
W
Notes:
1896: 11.1 @ 250. 7 measurements.
Observations:
C8 at 104x. 8.3m SAO 137919 is 21 minSW. It is an otherwise lonely pair.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.1 inches.
Separation: AB = 7.62 miles.
- 12 -
Zone 189
Distance (LY): 444
Total luminosity (Suns): 7
STF 3069 rej
Rating: 5 E
ADS B5759; HD 98749
Position: 1122-0143
A
B
Magnitude
9.10
11.80
Separation PA
—
—
16.9 219 -
Year
—
1980
Spectra
G5
Colors
yW
O?
Notes:
1894: 17.2 @ 220. 4 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 20.7 inches.
Separation: AB = 3.29 miles.
Distance (LY): 125
Total luminosity (Suns): 0.32
STF 3070
Rating: 5 E
ADS 8151; HD 99136; SAO 138186
Position: 1125-0423
A
B
Magnitude
9.70
10.20
Separation PA
—
—
8.7 +
277 +
Year
—
1983
Spectra
G5
G5
Colors
W
W
Notes:
1831: 8.0 @ 276. 21 measurements. The stars show similar proper motions.
Observations:
C8 at 104x. It forms the NW vertex of a flat 9m triangle.
- 13 -
Zone 189
STF 3071 rej
Rating: 5 E
ADS B5791; HD 99666; SAO 138219
Position: 1128-0155
A
B
Magnitude
9.40
11.10
Separation PA
—
—
33.6 +
300 -
Year
—
1980
Spectra
F2
Colors
W
?
Notes:
1894: 29.3 @ 303. 5 measurements. The Tycho-2 Catalog indicates a single-star
entry.
Observations:
C8 at 104x.
Difficult
Baillaud 532
Rating: 5 D
HD 96993; SAO 138022
Position: 1110-0149
A
B
Magnitude
8.56
12.30
Separation PA
—
—
10.1
75
Year
—
1894
Notes:
1 measurement.
Observations:
C11 at 115x.
Distance (LY): 1,050
Total luminosity (Suns): 34
- 14 -
Spectra
K5
Colors
Y
?
Zone 189
Deep Sky Objects
Easy
NGC 3521
Other Names: UGC 6150, H I 13
Astronomical League Program: Herschel 400 Club
Rating: 3 E
Position: 1106-0002
Type: Gal
Surface brightness: 13.6
Class: SAB(rs)bc
Dimensions: 6' x 4'
Magnitude: 10.2
PA: 163
Notes:
This galaxy is a radio source and may have undergone a starburst in the last billion
years.
Observations:
C8 at 65x. It is bright, large and easy, with a starlike nucleus. The halo is bright and
large and with high power (200x or more) and good seeing, you can make out some spiral
structure. It's a wonder Messier missed it! It lies 30 min E of 62 Leo.
Model (where the Sun is a baseball):
Its diameter would be 13 million miles.
Distance (LY): 35,000,000
Radial velocity (km/sec): +805
Luminosity (suns): 8,000,000,000
- 15 -
Zone 189
Zone 189, Map 3
Double Stars
Easy
h1203
Rating: 3 E
ADS 8340
Position: 1154+0331
A
B
Magnitude
10.11
11.21
Separation PA
—
—
5.7 315 +
Year
—
1991
Spectra
K0
Colors
yO
yW
Notes:
1906: 5.8 @ 312. 7 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 27.3 inches.
Separation: AB = 2.31 miles.
Distance (LY): 260
Total luminosity (Suns): 0.649
STF 1580
Rating: 3 E
ADS 8349; HD 103561; SAO 119118
Position: 1155+0333
A
B
C
D
BC
Magnitude
9.20
9.80
13.60
11.65
Separation PA
—
—
8.7 263 +
87.8
19.7 +
131
240 =
- 16 -
Year
—
1988
1988
1988
Spectra
A9 V
Colors
W
B
No
No
Zone 189
Notes:
AB 1828: 8.8 @# 261. 24 measurements.
BC 1907: 19.3 @ 240. 2 measurements.
AD 1 measurement.
Observations:
C8 at 104x. A 7.5m star lies 20 min S.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.30 inches.
Separation: AB = 2.28 miles; BC = 5.16 miles; AD = 23.0 miles.
Distance (LY): 168
Total luminosity (Suns): 0.8
Beta Vir
5 Vir; Alaraph; Zavijava; OS 576; HD 102870; SAO 119076
Rating: 4 E
Position: 1151+0146
A
B
C
Magnitude
3.61
10.60
8.80
Separation
—
305.3 +!!
539.1 =
PA
—
285 +
86 =
Year
—
1984
1884
Spectra
F8 V
Colors
yW
?
W
Notes:
AB 1850: 200.6 @ 283. 6 measurements. The primary is an infra-red source. The
stars have different proper motions.
AC 1852: 539.1 @ 86. 2 measurements.
The autumnal equinox is 2.5o SE of Beta.
Observations:
C8 at 104x. I had to use 200x and a diffraction mask to get a glimpse of star B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.60 inches.
Separation: AB = 17.2 miles; AC = 30.3 miles.
Distance (LY): 36
Total luminosity (Suns): 3.11
- 17 -
Zone 189
STF 1578
Rating: 4 E
ADS 8335; HD 103251; SAO 119096
Position: 1153+0340
A
B
Magnitude
10.14
11.36
Separation PA
—
—
3.0 =
162 -
Year
—
1991
Spectra
G0
Colors
Y
O?
Notes:
1831: 3.0 @ 171. 18 measurements.
Observations:
C11 at 193x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 19.0 inches.
Separation: AB = 686 feet.
Distance (LY): 29
Total luminosity (Suns): 0.008
STF 1568
Rating: 5 E
ADS 8277; HD 101845; SAO 119011
Position: 1143+0046
A
B
Magnitude
9.52
9.65
Separation PA
—
—
9.3 +
43 +?
Year
—
1991
Spectra
F5
Colors
W
W
Notes:
1830: 9.0 @ 221. 23 measurements. The stars show similar proper motions.
Quadrant reversal?
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.2 inches.
Separation: AB = 6.74 miles.
Distance (LY): 465
Total luminosity (Suns): 5
- 18 -
Zone 189
Moderate
A. G. 175
Rating: 4 M
ADS 8222; HD 100618
Position: 1135+0130
A
B
Magnitude
9.67
10.20
Separation PA
—
—
2.2 +
192 +
Year
—
1999
Spectra
F8
Colors
W
yW
Notes:
1903: 2.1 @ 186. 29 measurements.
Observations:
C11 at 193x.
h1193
Position: 1141+0455
A
B
Magnitude
10.89
12.00
Rating: 5 M
Separation PA
—
—
13.0
100
Year
—
1828
Spectra
F2
Colors
W
?
Notes:
1 measurement.
Observations:
C8 at 104x.
h1196
Position: 1146+0354
A
B
Magnitude
10.44
11.18
Rating: 5 M
Separation PA
—
—
29.0 +
185 +
Notes:
1903: 27.9 @ 184. 3 measurements.
- 19 -
Year
—
1911
Spectra
K0
Colors
yO
W?
Zone 189
Observations:
C11 at 115x.
Zone 189, Map 4
Double Stars
Easy
STF 1560
Rating: 2 E
ADS 8247; HD 101154; SAO 138314
Position: 1138-0226
A
B
Magnitude
6.22
9.43
Separation PA
—
—
5.0 280 -
Year
—
1991
Notes:
1831: 5.1 @ 281. 27 measurements.
Observations:
C8 at 206x. Webb saw them as Y? and ?.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 2.85 inches.
Separation: AB = 2.91 miles.
Distance (LY): 374
Total luminosity (Suns): 38
- 20 -
Spectra
G9 III
Colors
O
B
Zone 189
h2573
Rating: 4 E
ADS 8184
Position: 1130-0458
A
B
Magnitude
10.11
10.50
Separation PA
—
—
8.0 18 -
Year
—
1967
Spectra
Colors
W
bW
Notes:
1894: 8.1 @ 19. 12 measurements.
Observations:
C11 at 115x.
STF 1584
Rating: 4 E
ADS B5972; HD 103708; SAO 138492
Position: 1157-0437
A
B
Magnitude
8.76
10.26
Separation PA
—
—
13.0 +
188 +
Year
—
1991
Notes:
1831: 12.8 @ 187. 14 measurements.
Observations:
C8 at 104x. A 7m star is 10 min S.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.7 inches.
Separation: AB = 5.37 miles.
Distance (LY): 265
Total luminosity (Suns): 2.4
- 21 -
Spectra
G0
Colors
Y
B
Zone 189
Baillaud 2180
Position: 1145-0248
A
B
Magnitude
10.45
10.50
Rating: 5 E
Separation PA
—
—
11.4 =
346 =
Year
—
1931
Spectra
Colors
W
W
Notes:
1894: 11.4 @ 346. 3 measurements.
Observations:
C11 at 115x.
h190
Rating: 5 E
HD 102762; SAO 138431
Position: 1150-0451
A
B
Magnitude
8.11
11.40
Separation PA
—
—
28.3 +
280 +
Year
—
1989
Notes:
1922: 25.7 @ 278. 2 measurements.
Observations:
C8 at 104x. A 9m star (SAO 138427) is 4 min W.
- 22 -
Spectra
K2
Colors
O
?
Zone 189
Zone 189 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
STF 1529
1119-0139
2E
2
STF 1560
1138-0226
2E
4
A. G. 173
1101+0258
3E
1
STF 1506
1105-0413
3E
2
Phi Leo
1117-0339
3E
2
83 Leo
1127+0300
3E
1
h1203
1154+0331
3E
3
STF 1580
1155+0333
3E
3
H V 68
Jonckheere
1572
1108+0314
4E
1109-0442
4E
2
STF 1526
1119+0249
4E
1
Tau Leo
1128+0252
4E
1
STF 1548
1129-0343
4E
2
h2573
1130-0458
4E
4
Beta Vir
1151+0146
4E
3
STF 1578
1153+0340
4E
3
STF 1584
1157-0437
4E
4
Baillaud 530
1100-0200
5E
2
STF 3069 rej
1122-0143
5E
2
STF 1535
1123+0056
5E
1
Component
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
C
D
BC
A
B
C
BC
A
B
A
B
A
B
C
A
B
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
1
- 23 -
Mag
6.61
7.39
6.22
9.43
9.33
9.87
7.64
10.25
4.45
9.75
6.49
7.58
9.90
10.11
11.21
9.20
9.80
13.60
11.65
7.60
9.10
10.80
10.37
10.50
9.10
10.33
5.05
7.47
10.00
8.76
9.81
10.11
10.50
3.61
10.60
8.80
10.14
11.36
8.76
10.26
9.08
11.10
9.10
11.80
9.30
11.30
Separation
—
9.5 —
5.0 —
2.1 +
—
11.7 +
—
88.9 -!
—
28.6 90.5 —
5.7 —
8.7 -
PA
—
254 +
—
280 —
127 =
—
221 +
—
291 +
—
150 90.5 —
315 +
—
263 +
87.8
19.7 +
—
146.4 -
131
240 =
—
227 -
42.0 —
9.5 +
—
30.2 —
89.7 764.8 =
—
10.9 +
—
8.0 —
305.3 +!!
539.1 =
—
3.0 =
—
13.0 +
—
11.0 —
16.9 —
10.4 -
207 =
—
22 +
—
181 +
—
180 +
764.8 =
—
127 =
—
18 —
285 +
539.1 =
—
162 —
188 +
—
253 +
—
219 —
60 -
Zone 189
Designation
Position
Rating
Map
STF 3070
1125-0423
5E
2
STF 3071 rej
1128-0155
5E
2
STF 1568
1143+0046
5E
3
Baillaud 2180
1145-0248
5E
4
h190
1150-0451
5E
4
Bur 340
1130+0311
4M
1
A. G. 175
1135+0130
4M
3
h1193
1141+0455
5M
3
h1196
1146+0354
5M
3
STF 1500
1100+0328
5D
1
STF 1504
1104+0338
5D
1
Baillaud 532
1110-0149
5D
2
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
Mag
9.70
10.20
9.40
11.10
9.52
9.65
10.45
10.50
8.11
11.40
7.52
10.62
9.67
10.20
10.89
12.00
10.44
11.18
7.94
8.33
7.98
8.07
8.56
12.30
Separation
—
8.7 +
—
33.6 +
—
9.3 +
—
11.4 =
—
28.3 +
—
4.4 +
—
2.2 +
—
13.0
—
29.0 +
—
1.4 +
—
1.2 +
—
10.1
PA
—
277 +
—
300 —
43 +?
—
346 =
—
280 +
—
11 +
—
192 +
—
100
—
185 +
—
303 —
301 +
—
75
Deep Sky Objects
Specifications
Object
NGC 3521
NGC 3630
NGC 3662
NGC 3640
NGC 3495
NGC 3664
NGC 3611
Position
1106-0002
1120+0258
1124-0106
1121+0314
1101+0338
1124+0320
1118+0433
Rating
3E
3M
4M
5M
4D
4D
5D
Map
2
1
1
1
1
1
Type
Gal (SAB(rs)bc)
Gal (S0)
Gal (Sb pec)
Gal (E1)
Gal (Sd: III)
Gal (SB(s)m pec IV-V)
Gal (SA(s)a pec)
- 24 -
Mag
10.2
11.9
12.9
11.6
11.8
12.8
12.6
Surface
Br
13.6
11.9
12.7
13.5
13.2
13.7
14.0
Pop.