Normal View
Zone Master, Normal View, 10 deg FOV
Scu
-04°00'
Zone 221, Master Map
η
-06°00'
λ
κ
Sagittarius
d
-14°00'
f
-12°00'
-10°00'
-08°00'
c
e
11
υ
20h 00m
19h 52m
19h 44m
19h 36m
19h 28m
19h 20m
19h 12m
19h 04m
18h 56m
Zone 221, Map 1
Normal Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
λ
Lambda Aql
h881
Hough 575
NGC 6751
PK 31-10.1
12 Aql
-06°00'
26 Aql
-05°00'
STF 2501
STF 2494 rej
STF 2503
-07°00'
Barnard 133
STF 2439
Barton 492
-08°00'
Hough 104
20 Aql
STF 2425
Hipparcos 2695
-09°00'
A 98
IC 4846
STF 2519
Hussey 73
19h 30m
19h 25m
19h 20m
19h 15m
19h 10m
19h 05m
19h 00m
Zone 221, Map 1
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 2501
-05°00'
λ
Lambda Aql
26 Aql
h881
12 Aql
-06°00'
Hough 575
NGC 6751
PK 31-10.1
STF 2494 rej
-07°00'
Barnard 133
STF 2503
STF 2439
Barton 492
-08°00'
Hough 104
20 Aql
STF 2425
Hipparcos 2695
-09°00'
A 98
IC 4846
Hussey 73
19h 00m
19h 05m
19h 10m
19h 15m
19h 20m
19h 25m
19h 30m
Zone 221, Map 2
Normal Image
-10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Hussey 73
h5096
-11°00'
h5090
Bur 140
PK 26-11.1
Hough 100
Sagittarius
-12°00'
h2860
-13°00'
Jonckheere 482
-14°00'
Hipparcos 2761
Glasenapp 8
Leonard 25
19h 30m
19h 25m
19h 20m
19h 15m
19h 10m
19h 05m
19h 00m
Zone 221, Map 2
Mirror Image
-10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Hussey 73
h5096
Bur 140
-11°00'
h5090
PK 26-11.1
-12°00'
h2860
Hough 100
-13°00'
Jonckheere 482
-14°00'
Hipparcos 2761
Glasenapp 8
Leonard 25
19h 00m
19h 05m
19h 10m
19h 15m
19h 20m
19h 25m
19h 30m
Zone 221, Map 3
Normal Image
-05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-06°00'
A 106
STF 2591
STF 2597
NGC 6821
-07°00'
Schjellerup 23
-08°00'
κ
11
57 Aql
SI 45
h892
Harvard 155
-09°00'
56 Aql
Hough 579
Bur 1475
Leavenworth 21
STF 2545
20h 00m
19h 55m
19h 50m
19h 45m
NGC 6814
19h 40m
STF 2547
19h 35m
19h 30m
Zone 221, Map 3
Mirror Image
-05°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
-06°00'
A 106
STF 2591
Schjellerup 23
NGC 6821
-07°00'
STF 2597
-08°00'
κ
11
h892
57 Aql
SI 45
Harvard 155 Bur 1475
Hough 579
Leavenworth 21
STF 2545
19h 30m
19h 35m
STF 2547
19h 40m
NGC 6814
19h 45m
19h 50m
19h 55m
20h 00m
-09°00'
56 Aql
Zone 221, Map 4
Normal Image
-10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Leavenworth 21
STF 2545
NGC 6814
STF 2547
STF 2541
-11°00'
Hussey 77
STF 2581 rej
-12°00'
Hipparcos 2811
h602
NGC 6836
-13°00'
NGC 6835
STF 2565
-14°00'
STF 2602
NGC 6818
Hipparcos 2814
NGC 6822
Hipparcos 2824
20h 00m
19h 55m
19h 50m
19h 45m
19h 40m
19h 35m
19h 30m
Zone 221, Map 4
Mirror Image
-10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
Leavenworth 21
STF 2545
STF 2547
STF 2541
NGC 6814
-11°00'
Hussey 77
STF 2581 rej
-12°00'
Hipparcos 2811
h602
NGC 6836
-13°00'
NGC 6835
STF 2565
-14°00'
STF 2602
NGC 6818
Hipparcos 2814
NGC 6822
Hipparcos 2824
19h 30m
19h 35m
19h 40m
19h 45m
19h 50m
19h 55m
20h 00m
Zone 221
1 Reference Star, 45 Double Stars, 5 Planetary Nebulae
1 Globular Cluster, 5 Galaxies
Flamsteed
Hipparcos 2824 .................................... 31
Hough 100............................................ 16
Hough 104............................................ 10
Hough 575............................................ 10
Hough 579............................................ 23
Hussey 73............................................... 7
Hussey 77............................................. 30
12 Aql .................................................... 8
20 Aql .................................................... 3
26 Aql .................................................... 7
56 Aql .................................................. 25
57 Aql .................................................. 21
A
A 106 ................................................... 20
A 98 ....................................................... 9
I
B
J
Barnard 133 ......................................... 12
Barton 492 ............................................. 6
Bur 140 ................................................ 14
Bur 1475 .............................................. 19
Jonckheere 482 .................................... 17
G
N
Glasenapp 8 ......................................... 17
NGC 6751 ............................................ 12
NGC 6814 ............................................ 33
NGC 6818 ............................................ 32
NGC 6821 ............................................ 25
NGC 6822 ............................................ 34
NGC 6835 ............................................ 34
NGC 6836 ............................................ 33
IC 4846 ................................................ 13
L
Leavenworth 21 ................................... 23
H
h2860 ................................................... 17
h5090 ................................................... 15
h5096 ................................................... 15
h602 ..................................................... 30
h881 ....................................................... 5
h892 ..................................................... 22
Harvard 155 ......................................... 19
Hipparcos 2695...................................... 9
Hipparcos 2761.................................... 16
Hipparcos 2811.................................... 28
Hipparcos 2814.................................... 29
P
Palomar 11 ........................................... 26
PK 26-11.1 ........................................... 18
PK 31-10.1 ........................................... 11
S
Schjellerup 23 ...................................... 22
-1-
Zone 221
SI 45..................................................... 20
STF 2425 ............................................... 4
STF 2439 ............................................... 3
STF 2494 rej .......................................... 6
STF 2503 ............................................... 8
STF 2519 ............................................... 4
STF 2541 ............................................. 27
STF 2545.............................................. 27
STF 2547.............................................. 26
STF 2565.............................................. 28
STF 2581 rej ........................................ 29
STF 2591.............................................. 21
STF 2597.............................................. 24
STF 2602.............................................. 31
-2-
Zone 221
Zone 221, Map 1
Reference Star
20 Aql (HD 179406; SAO 143134)
Position: 1913-0756
Mag : 5.35
Assumed distance: 1,220 light years
Spectrum : B3 V
Color : bW
Assumed luminosity (suns): 900
Double Stars
Easy
STF 2439
Rating: 2 E
HD 177444; SAO 142994
Position: 1905-0709
A
B
Magnitude
8.56
10.04
Separation PA
—
—
22.0 +
199 =
Year
—
1992
Spectra
B8
Notes:
1825: 21.9 @ 199. 1
measurements. Hipparcos/Tycho data
show different distances for these stars;
they may be optical.
Observations:
C8 at 100x.
Scale model (in which the Sun is the
size of a baseball):
Diameter: A = 4.42 inches.
Separation: AB = 64.9 miles.
Distance (LY): 1,890
Total luminosity (Suns): 129
STF 2439
Observed with C-8
Magnification: 100x
-3-
Colors
W
O
Zone 221
STF 2519
Rating: 2 E
ADS 12472; HD 183107; SAO 143431
Position: 1928-0932
A
B
Magnitude
8.38
8.54
Separation PA
—
—
11.6 +
125 +
Year
—
1991
Spectra
F0
F0
Colors
W
W
Notes:
1833: 11.2 @ 124. 25 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 = 10.7 inches; B = 10.8
inches.
Separation: AB = 12.85 miles.
Distance (LY): 710
Total luminosity (Suns): 36
STF 2519
Observed with C8
Magnification: 83x
STF 2425
Rating: 3 E
HD 176416; SAO 142908
Position: 1901-0807
A
B
Magnitude
7.92
8.64
Separation PA
—
—
29.9 178 -
-4-
Year
—
1991
Spectra
G5
G5
Colors
O
W
Zone 221
Notes:
1825: 32.1 @ 184. 26 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. The stars have a small difference in proper
motion.
Observations:
C8 at 83x. Webb: Y, W.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 19.3 inches; B = 20.1 inches.
Separation: AB = 17.9 miles.
Distance (LY): 384
Total luminosity (Suns): 14
h881
Hough 574 (C); ADS 12283; HD 180785; SAO 143237
Rating: 3 E
Position: 1918-0525
A
B
C
D
a
Magnitude
7.40
9.92
10.10
13.3
10.75
Separation PA
—
—
32.2 340 =
87.5
15.9 +
251
62 =
Year
—
1991
1988
1988
1988
Spectra
K2
Colors
O
W
W?
No
W?
Notes:
AB 1892: 33.2 @ 340. 9 measurements. The stars have different proper motions.
BC 1895: 7.0 @ 306. 1988: 7.3+ @ 307+. 7 measurements.
AD 1 measurement.
Aa 1895: 15.5 @ 62. 3 measurements.
Observations:
C8 at 206x. Some observers report O and B for A and B. Webb: O, B, B. 1 min N
lies a very faint pair (12m/12.5m) about 7 @ 130.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 25.8 inches.
Separation: AB = 19.6 miles; BC = 4.45 miles; AD = 53.4 miles; Aa = 9.70 miles.
Distance (LY): 391
Total luminosity (Suns): 15
-5-
Zone 221
STF 2494 rej
Rating: 4 E
ADS 12314; HD 181255; SAO 143275
Position: 1920-0638
A
B
Magnitude
6.90
10.30
Separation PA
—
—
25.8 88 +
Year
—
1982
Spectra
K0
Colors
Y
W
Notes:
1848: 26.6 @ 76. 9 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical.
Observations:
C8 at 83x. Webb: rO, B. Fine colors.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 22.6 inches.
Separation: AB = 44.3 miles.
Distance (LY): 1,100
Total luminosity (Suns): 207
Barton 492
Rating: 5 E
HD 180485; SAO 143215
Position: 1917-0713
A
B
Magnitude
10.07
10.86
Separation PA
—
—
5.3 =
189 -
Notes:
1892: 5.3 @ 191. 3 measurements.
Observations:
C11 at 98x. It lies in a rich but faint field.
-6-
Year
—
1991
Spectra
G0
Colors
W
W
Zone 221
26 Aql
Rating: 5 E
HD 181391; SAO 143286
Position: 1921-0524
A
B
Magnitude
4.98
13.07
Separation PA
—
—
116
9
Year
—
1959
Spectra
G5 IV
Colors
Y
?
Notes:
Star A is a spectroscopic binary with a 266.544 day period, as well as an infra-red
source. The orbit is highly eccentric (e = 0.83).
It may also coincide with the X-ray source 3U1915-05.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 27.9 miles.
Distance (LY): 154
Total luminosity (Suns): 17.13
Hussey 73
Rating: 5 E
ADS 12368
Position: 1923-1000
A
B
C
Magnitude
10.04
10.92
11.00
Separation
—
0.9 7.8 =
PA
—
220 191 =
Notes:
AB 1899: 1.0 @ 223. 10 measurements.
AC 1922: 7.8 @ 191. 2 measurements.
Observations:
C11 at 98x.
-7-
Year
—
1991
1930
Spectra
G5
Colors
Y
No
W
Zone 221
Moderate
STF 2503
Rating: 3 M
ADS 12360; HD 181940; SAO 143330
Position: 1923-0708
A
B
Magnitude
8.78
9.65
Separation PA
—
—
2.4 285 +
Year
—
1999
Spectra
F0
Colors
W
W
Notes:
1829: 2.6 @ 280. 23 measurements.
Observations:
C11 at 339x. It is part of a mini-Sagitta asterism.
12 Aql
Rating: 4 M
ADS 14592; HD 200497; SAO 142931
Position: 1902-0549
A
B
Magnitude
4.01
7.30
Separation PA
—
—
3
192
Year
—
1973
Notes:
The primary is an infra-red source.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 37.5 inches; B = 8.10 inches.
Separation: AB = 3,643 feet.
Distance (LY): 149
Total luminosity (Suns): 9.7
-8-
Spectra
G4 III
A3 V
Colors
W
W
Zone 221
A 98
Rating: 4 M
ADS 12188; HD 179799; SAO 143163
Position: 1914-0843
A
B
C
BC
Magnitude
6.54
11.08
11.10
Separation PA
—
—
26.0 128 =
1.1 -
60 +
Year
—
1937
Spectra
K0 IV
1997
Colors
Y
?
?
?
Notes:
AB 1900: 28.8 @ 128. 3 measurements.
BC 1900: 1.2 @ 55. 5 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 9.08 miles.
Distance (LY): 224
Total luminosity (Suns): 10.2
Hipparcos 2695
Rating: 5 M
HD 176361; SAO 142899
Position: 1900-0824
A
B
Magnitude
8.71
11.40
Separation PA
—
—
10.8 105 =
Notes:
1892: 11.0 @ 105. 3 measurements.
Observations:
C11 at 98x.
-9-
Year
—
1991
Spectra
B9
Colors
W
bW
Zone 221
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.24 inches.
Separation: AB = 21.4 miles.
Distance (LY): 1,270
Total luminosity (Suns): 45
Hough 104
A 102 (B); ADS 12348; HD 181782
Rating: 5 M
Position: 1922-0735
A
B
C
Magnitude
8.53
9.50
10.84
Separation
—
0.2 5.1 -
PA
—
310 -!!
126 +
Year
—
1984
1961
Spectra
F2
Colors
W
No
W
Notes:
AB 1900: 0.4 @ 37. 17 measurements.
AC 1885: 5.2 @ 125. 8 measurements.
Observations:
C11 at 98x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 422 feet; AC = 2.22 miles.
Distance (LY): 279
Total luminosity (Suns): 3.60
Difficult
Hough 575
Rating: 5 D
ADS 12290; HD 180976; SAO 143250
Position: 1919-0546
A
B
Magnitude
7.98
11.90
Separation PA
—
—
5.9 +
11 +
- 10 -
Year
—
1991
Spectra
A0
Colors
W
?
Zone 221
Notes:
1894: 5.7 @ 10. 6 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.11 inches.
Separation: AB = 9.02 miles.
Distance (LY): 980
Total luminosity (Suns): 50
Deep Sky Objects
Easy
PK 31-10.1
Other Names: M3-34
Rating: 4 E
Position: 1927-0635
Type: Pn
Dimensions: 6.0'' x 5.1''
Class: 2
Magnitude: 12.4
Notes:
The central star is 14.6m.
Observations:
C8 at 206x. It was easy (but stellar) at low powers; at 200x, it takes on an oval shape.
- 11 -
Zone 221
Moderate
Barnard 133
Other Names: LDN 531
Rating: 5 M
Position: 1906-0650
Type: Dn
Dimensions: 10' x 5'
Observations:
C8 at 83x. It is just W of a 9.2m star. It curves N (convex to W). It is very dark to the
South. Four or five stars are in the Northern part.
Difficult
NGC 6751
Other Names: PK 29-5.1
Rating: 5 D
Position: 1906-0600
Type: Pn
Dimensions: 20"
Class: 3
Magnitude: 12.5
Notes:
Albert Marth discovered this nebula in1863.
Observations:
C8 at 83x. Faint and round, it magnifies well. It has a slightly bluish color. Note the
dR star 30 min NW (this is the variable star V Aql, which ranges from 6.6m to 8.4m).
Model (where the Sun is a baseball):
Its diameter would be 203 miles.
Distance (LY): 6,500
Luminosity (suns): 33
- 12 -
Zone 221
IC 4846
Other Names: PK 27-9.1
Rating: 5 D
Position: 1916-0859
Type: Pn
Dimensions: 2''
Class: 2
Magnitude: 12.0
Notes:
Williamina Fleming discovered this
nebula in 1901.
Observations:
C8 at 104x. It was an exceptionally
faint smudge with averted vision.
The central star is 13.7m.
It lies about 20 min south of a 7.5m
star.
IC 4846
Planetary nebula
Observed with C11 on 7/25/03; s8, t6
Magnification: 98x + O-III
- 13 -
Zone 221
Zone 221, Map 2
Double Stars
Easy
Bur 140
Rating: 2 E
ADS 12244; HD 180409; SAO 162401
Position: 1917-1058
A
B
C
BC
Magnitude
6.93
10.96
10.60
Separation PA
—
—
44.9 +
308 7.8 +
208 -
Year
—
1981
Spectra
G0 V
1917
Notes:
AB 1879: 33.9 @ 318. 12
measurements.
BC 1891: 7.2 @ 209. 7
measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is
the size of a baseball):
Diameter: A = 3.45 inches.
Separation: AB = 6.58 miles.
Distance (LY): 94
Total luminosity (Suns): 1.19
Bur 140
Observed with C8
Magnification: 206x
- 14 -
Colors
W
?
?
Zone 221
h5090
Rating: 3 E
HD 177730
Position: 1906-1043
A
B
Magnitude
9.49
9.50
Separation PA
—
—
12.6 +
247 +
Year
—
1991
Spectra
G5
Colors
Y
Y
Notes:
1906: 12.5 @ 246. 7 measurements.
May be optical because Hipparcos gives different distances (294 and 320 light years).
Observations:
C11 at 98x.
h5096
Rating: 3 E
HD 179194; SAO 162300
Position: 1912-1035
A
B
Magnitude
8.89
9.93
Separation PA
—
—
18.0 +
74 +
Year
—
1991
Spectra
G0
Colors
Y
dO!!
Notes:
1904: 17.7 @ 73. 7 measurements.
Hipparcos/Tycho mission data show different distances for these stars (272 and 163
light years); they may be optical.
Observations:
C8 at 104x.
- 15 -
Zone 221
Hipparcos 2761
Rating: 4 E
HD 182703; SAO 162617
Position: 1927-1308
A
B
Magnitude
9.34
10.07
Separation PA
—
—
12.0 +? 121 +!?
Year
—
1991
Spectra
G8II/III
Colors
Y
O
Notes:
1991: 4.2 @ 74. 2 measurements. One of these measures looks suspicious.
Observations:
C11 at 98x.
Distance (LY): 226
Total luminosity (Suns): 1.13
Hough 100
Rating: 5 E
ADS 12119; HD 178881; SAO 162279
Position: 1911-1209
A
B
Magnitude
7.95
10.68
Separation PA
—
—
4.9 +
327 -
Year
—
1991
Notes:
1884: 4.8 @ 328. 8 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 11.0 miles.
Distance (LY): 1,440
Total luminosity (Suns): 109
- 16 -
Spectra
A0 IV
Colors
Y
?
Zone 221
h2860
Rating: 5 E
SAO 162409
Position: 1917-1134
A
B
Magnitude
10.17
9.97
Separation PA
—
—
21.2 +
110 +
Year
—
1982
Spectra
G0
G0
Colors
W
pO?
Notes:
1905: 19.9 @ 107. 8 measurements.
The stars have different proper motions.
Observations:
C8 at 104x. There is also a very faint pair (about 11m each, 20" in pa 90) just 3 min
SSW.
Glasenapp 8
Rating: 5 E
HD 182363; SAO 162580
Position: 1925-1438
A
B
Magnitude
9.24
10.41
Separation PA
—
—
24.3 +
68 -
Year
—
1991
Spectra
A2 V
Colors
W
B
Notes:
1890: 24.0 @ 69. 7 measurements.
Observations:
C8 at 104x. It forms the obtuse angle of a triangle with two 8.5m stars.
Difficult
Jonckheere 482
Position: 1910-1233
A
B
Magnitude
10.71
12.00
Rating: 5 D
Separation PA
—
—
2.8 +
295 =
- 17 -
Year
—
1945
Spectra
Colors
W
O?
Zone 221
Notes:
1911: 2.6 @ 295. 3 measurements.
Observations:
C8 at 280x.
Deep Sky Objects
Difficult
PK 26-11.1
Other Names: Nassau 2
Rating: 4 D
Position: 1919-1106
Type: Pn
Magnitude: 13.3
Notes:
The central star is 14.0m.
Observations:
C8 at 206x. There appear to be 2 or 3 very faint stars involved in it. It is a difficult
object!
- 18 -
Zone 221
Zone 221, Map 3
Double Stars
Easy
Bur 1475
HDO 155 (AC); ADS 13163; HD 188938; SAO 143951
Rating: 3 E
Position: 1958-0904
A
B
C
D
Magnitude
7.56
9.41
6.59
11.30
Separation
—
10.4 +
115 +!!
5.1 -
PA
—
113 +
120 +
158 =
Year
—
1991
1919
Spectra
K2
K0
Colors
pY
W?
W
W
Notes:
AB 1906: 10.1 @ 112. 5 measurements.
AC 1868: 13.6 @ 119. 3 measurements.
AD 1906: 5.4 @ 158. 2 measurements.
Observations:
C11 at 98x. It took 339x to get D.
Harvard 155
Bur 1475; ADS 13163; HD 188938; SAO 143951
Rating: 3 E
Position: 1958-0903
A
B
C
D
CD
Magnitude
7.56
9.41
8.00
11.3
Separation
—
10.4 +
112.3 +
PA
—
113 =
120 +
Year
—
1991
1979
5.1 -
158 =
1906
Notes:
A and C have common proper motion.
- 19 -
Spectra
K2
Colors
Y
?
B
?
Zone 221
Observations:
C8 at 83x.
A 106
Rating: 4 E
ADS 12698; HD 185158; SAO 143627
Position: 1938-0535
A
B
Magnitude
9.19
11.41
Separation PA
—
—
57.3 3-
Year
—
1984
Spectra
G0
Colors
Y
W?
Notes:
1894: 57.5 @ 10. 4 measurements.
A has a 9.94m companion at 0.9 @ 240 (1991).
Observations:
C8 at 104x.
SI 45
Rating: 4 E
HD 186158; SAO 143722
Position: 1943-0818
A
B
Magnitude
7.07
7.51
Separation PA
—
—
96.7 +
146 -
Year
—
1991
Notes:
1835: 96.4 @ 147. 26 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 = 4.50 inches; B = 14.5 inches.
Separation: AB = 29.1 miles.
Distance (LY): 193
Total luminosity (Suns): 7.1
- 20 -
Spectra
F4 V
F8 V
Colors
W
W
Zone 221
STF 2591
Rating: 4 E
HD 188023; SAO 143884; H I 93
Position: 1953-0600
A
B
Magnitude
8.74
9.23
Separation PA
—
—
29.5 +
107 -
Year
—
1992
Spectra
F8
G0
Colors
bW
W
Notes:
1827: 29.2 @ 109. 20 measurements.
Observations:
C8 at 104x. Webb: yW, W.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 15.6 inches; B = 18.2 inches.
Separation: AB = 4.05 miles.
Distance (LY): 88
Total luminosity (Suns): 0.35
57 Aql
STF 2594; ADS 13087; HD 188293; SAO 143899
Astronomical League Program: Double Star Club
Rating: 4 E
Position: 1955-0814
A
B
Magnitude
5.80
6.49
Separation PA
—
—
35.6 170 -
Year
—
1992
Spectra
B8 V
B6 V
Colors
W
W
Notes:
1821: 36.2 @ 172. 54 measurements. The stars share common proper motion.
Both stars are spectroscopic binaries. A rotates at an incredible 340 kps.
Observations:
C8 at 65x. Some observers report Y and G. Webb: Y, pL (but then he reports Y and
B or G in 1855 and comments on how different it was then than in 1851). Knott: W, pB.
Dembowski: Y, bW. Franks: yW, B or L.
- 21 -
Zone 221
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.2 inches; B = 10.8 inches.
Separation: AB = 20.11 miles.
Distance (LY): 362
Total luminosity (Suns): 76
Schjellerup 23
Rating: 4 E
HD 188487; SAO 143918
Position: 1956-0643
A
B
Magnitude
9.14
10.71
Separation PA
—
—
36.5 +
25 +
Year
—
1991
Spectra
K
Colors
O
W
Notes:
1890: 36.3 @ 24. 8 measurements.
Observations:
C8 at 104x. A 6.5m star 7 min W is a problem.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 36.7 inches.
Separation: AB = 9.17 miles.
Distance (LY): 161
Total luminosity (Suns): 0.6
h892
Rating: 5 E
HD 185211; SAO 143638
Position: 1938-0819
A
B
Magnitude
9.16
11.80
Separation PA
—
—
23.2 14 =
Year
—
1982
Notes:
1892: 24.1 @ 14. 5 measurements.
The Tycho-2 Catalogue indicates a single star entry.
- 22 -
Spectra
K0
Colors
O
W
Zone 221
Observations:
C8 at 104x. A 9.4m star anchors the field on the SE.
Leavenworth 21
Rating: 5 E
ADS 12694; HD 185068; SAO 162829
Position: 1938-0958
A
B
C
BC
Magnitude
7.22
10.77
11.46
Separation PA
—
—
82.2 +
286 =
3.8 =
Year
—
1912
1956
Spectra
A2
Colors
W
bW
?
284 +
Notes:
AB 1903: 82.1 @ 286. 2 measurements.
BC 1879: 3.8 @ 283. 7 measurements.
Observations:
C8 at 83x. The BC pair is very tough.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.71 inches.
Separation: AB = 33.0 miles; BC = 1.52 miles.
Distance (LY): 257
Total luminosity (Suns): 7.3
Hough 579
Rating: 5 E
ADS 12823
Position: 1943-0904
A
B
C
Magnitude
8.83
9.88
10.49
Separation
—
2.7 +
63.5 +
PA
—
306 154 -
Notes:
AB 1895: 2.4 @ 308. 10 measurements.
AC 1893: 61.5 @ 155. 6 measurements.
- 23 -
Year
—
1991
1987
Spectra
A0
Colors
W
No
W
Zone 221
Observations:
C8 at 104x. Very faint.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.43 inches.
Separation: AB = 6.48 miles; AC = 153 miles.
Distance (LY): 1,540
Total luminosity (Suns): 54
Difficult
STF 2597
Bowyer 8 (C); ADS 13104; HD 188405; SAO 143911
Rating: 3 D
Position: 1955-0644
A
B
C
Magnitude
6.49
7.53
13.50
Separation
—
0.4 13.6
PA
—
106 +
245
Year
—
1999
1905
Spectra
F2 V
Colors
W
W
?
Notes:
AB 1826: 1.9 @ 92. Over 100 measurements. Orbit calculated, with period of 425
years, semi-major axis of 1.08", and retrograde motion.
AC 1 measurement.
Observations:
C11 at 634x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.10 inches.
Separation: AB = 898 feet; AC = 5.92 miles.
Distance (LY): 279
Total luminosity (Suns): 21.4
- 24 -
Zone 221
56 Aql
h900; HD 188154; SAO 143894
Rating: 5 D
Position: 1954-0834
A
B
Magnitude
5.76
12.32
Separation PA
—
—
46.4 76 -
Year
—
1901
Spectra
K5 III
Colors
O!!
?
Notes:
1880: 46.7 @ 78. 2 measurements. The primary is an infra-red source.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 54.3 inches.
Separation: AB = 28.5 miles.
Distance (LY): 394
Total luminosity (Suns): 59.21
Deep Sky Objects
Difficult
NGC 6821
Other Names: PGC 63594
Rating: 5 D
Position: 1944-0649
Type: Gal
Surface brightness: 13.3
Class: SB(s)d:
Dimensions: 1'
Observations:
C8 at 206x. It was an extremely faint "star".
Radial velocity (km/sec): +1,525
- 25 -
Magnitude: 13.1
PA: 135
Zone 221
Palomar 11
Position: 1945-0800
Type: Gc
PA: 9.8
Rating: 5 D
Class: 11
Dimensions: 10'
Observations:
C11 at 98x. It lies at the S end of a N-S zig-zag of 9.5 to 10.5m stars. It is quite dim
and large; with direct vision, it easily resembles an open cluster; with averted vision, it
fills in with a lot of haze. Without a cluster catalog, you might list this one as an open
cluster.
Distance (LY): 36,000
Total luminosity (Suns): 12,200
Zone 221, Map 4
Double Stars
Easy
STF 2547
Rating: 3 E
ADS 12725; HD 185342; SAO 162847
Position: 1939-1020
A
B
C
Magnitude
8.08
9.48
11.14
Separation
—
20.8 +
49.8 -
PA
—
331 142 -
Year
—
1991
1991
Spectra
A0
Colors
W
W
B
Notes:
AB 1830: 20.7 @ 332. 14 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. The stars share a small common proper
motion.
AC 1900: 50.2 @ 143. 8 measurements.
Observations:
C8 at 83x.
- 26 -
Zone 221
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.15 inches.
Separation: AB = 11.8 miles; AC = 28.1 miles.
Distance (LY): 362
Total luminosity (Suns): 8.28
STF 2545
Rating: 3 E
ADS 12715; HD 185298; SAO 162843
Position: 1939-1006
A
B
C
Magnitude
6.61
8.63
11.40
Separation
—
3.7 +
26.1 -
PA
—
326 +
165 -
Year
—
1998
1959
Spectra
A5 III
Colors
Y
B
?
Notes:
AB 1829: 3.5 @ 315. 81 measurements.
AC 1847: 27.1 @ 169. 11 measurements.
Observations:
C8 at 104x. Webb: W, B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.8 inches.
Separation: AB = 1.51 miles; AC = 10.7 miles.
Distance (LY): 263
Total luminosity (Suns): 14.4
STF 2541
Rating: 4 E
ADS 12664; HD 184860; SAO 162814
Position: 1937-1027
A
B
Magnitude
8.38
9.81
Separation PA
—
—
5.5 +
326 -
Notes:
1828: 2.5 @ 343. 60 measurements.
- 27 -
Year
—
1995
Spectra
K2 V
Colors
Y
?
Zone 221
Observations:
C8 at 516x. Webb: Y, ?.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 2.1 inches.
Separation: AB = 4,435 feet.
Distance (LY): 99
Total luminosity (Suns): 0.39
STF 2565
Rating: 4 E
ADS 12862; SAO 162952
Position: 1946-1314
A
B
Magnitude
9.30
9.50
Separation PA
—
—
5.5 +
40 +
Year
—
1987
Spectra
K0 III
Colors
Y
W
Notes:
1830: 5.4 @ 34. 15 measurements.
Observations:
C8 at 83x.
Hipparcos 2811
Rating: 4 E
HD 186749
Position: 1947-1129
A
B
Magnitude
10.06
10.25
Separation PA
—
—
16.2 =
201 -
Notes:
1905: 16.2 @ 202. 6 measurements.
Observations:
C11 at 98x.
- 28 -
Year
—
1991
Spectra
F8
Colors
W
W
Zone 221
Hipparcos 2814
Rating: 4 E
HD 186967; SAO 162997
Position: 1948-1434
A
B
Magnitude
8.54
10.58
Separation PA
—
—
18.2 +
139 +
Year
—
1991
Spectra
B9 IV/V
Colors
W
W
Notes:
1905: 17.3 @ 136. 3 measurements.
The Tycho-2 Catalog indicates a single star entry.
Observations:
C11 at 98x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 19.3 miles.
Distance (LY): 680
Total luminosity (Suns): 16
STF 2581 rej
Rating: 4 E
HD 187306; SAO 163020
Position: 1950-1125
A
B
Magnitude
7.26
10.69
Separation PA
—
—
43.5 +! 286 +
Year
—
1991
Spectra
F5
Colors
W
B
Notes:
1879: 37.5 @ 281. 9 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical.
Observations:
C8 at 83x. Star B is very difficult to see, due mainly to its color. Bright, rich field to
the N.
- 29 -
Zone 221
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.4 inches.
Separation: AB = 17.9 miles.
Distance (LY): 264
Total luminosity (Suns): 6.9
Hussey 77
Rating: 4 E
ADS 12998; HD 187493; SAO 163035
Position: 1951-1047
A
B
C
Magnitude
9.36
11.80
9.42
Separation
—
0.4 28.1 -
PA
—
320 +
317 -
Year
—
1923
1982
Spectra
K0
Colors
Y
No
W
Notes:
AB 1899: 0.5 @ 317. 2 measurements.
AC 1845: 30.8 @ 319. 6 measurements.
Observations:
C11 at 98x.
h602
Rating: 4 E
ADS 13089; HD 188273
Position: 1955-1223
A
B
Magnitude
9.75
10.60
Separation PA
—
—
6.8 313 -
Notes:
1906: 7.1 @ 314. 3 measurements.
Observations:
C11 at 98x. This pair is part of a small triangle.
- 30 -
Year
—
1965
Spectra
G8 V
Colors
Y
W
Zone 221
STF 2602
Dembowski 31 (C); Bur 1476 (?); ADS 13134
Rating: 4 E
Position: 1956-1321
A
B
C
Magnitude
9.26
9.82
9.00
Separation
—
12.2 +
131.3
PA
—
148 192
Year
—
1991
1864
Spectra
B9.5 V
A0
Colors
W
W
No
Notes:
AB 1829: 12.1 @ 150. 17 measurements.
AC 1 measurement.
Observations:
C11 at 98x.
Hipparcos 2824
Rating: 5 E
HD 187411; SAO 163027
Position: 1950-1456
A
B
Magnitude
8.18
11.01
Separation PA
—
—
14.0 +
333 -
Year
—
1991
Notes:
1905: 13.9 @ 335. 3 measurements.
Observations:
C11 at 98x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.75 inches.
Separation: AB = 16.2 miles.
Distance (LY): 740
Total luminosity (Suns): 24
- 31 -
Spectra
A7 V
Colors
W
?
Zone 221
Deep Sky Objects
Easy
NGC 6818
Rating: 2 E
Other Names: The Little Gem; PK 25-17.1, H IV 51
Astronomical League Program: Herschel 400 Club, Urban Deep Sky Club
Position: 1944-1409
Type: Pn
Dimensions: 15" x 22"
Class: 4
Magnitude: 9.9
Notes:
William Herschel discovered this nebula
in 1787.
Observations:
C8 at 206x. Bright, with a ring at medium
power. It is a strong green in color. (Faith
Jordan, an observer from the United Kingdom,
thought it blue.)
Steve Coe writes that it resembles the CBS
"eye".
Barnard's Galaxy (NGC 6822) lies 45 min
SSE.
Model (where the Sun is a baseball):
Its diameter would be 178 miles.
NGC 6818
Planetary nebula
Observed with C8 on 8/22/92
Magnification: 104x
Distance (LY): 5,200
Luminosity (suns): 230
- 32 -
Zone 221
Difficult
NGC 6814
Other Names: H III 744; PGC 63545
Astronomical League Program: Herschel II Club
Rating: 4 D
Position: 1943-1019
Type: Gal
Surface brightness: 13.5
Class: SAB(s)bc I-II
Dimensions: 2'
Magnitude: 12.2
Notes:
This is a Seyfert galaxy.
Observations:
C8 at 83x. A dim, round smudge. At high powers, the N edge seems to end abruptly.
C11 at 98x. The notes I made at the C11 on this night show about the same view as
the C8 years earlier. Nothing to add.
Model (where the Sun is a baseball):
Its diameter would be 13 million miles.
Distance (LY): 71,000,000
Radial velocity (km/sec): +1,590
Luminosity (suns): 5,200,000,000
NGC 6836
Other Names: PGC 63803
Rating: 4 D
Position: 1955-1241
Type: Gal
Surface brightness: 13.6
Class: SABm
Dimensions: 1.2'
Magnitude: 12.9
PA: 140
Observations:
C8 at 206x. All that was visible was a sharp, stellar nucleus.
Radial velocity (km/sec): +1,627
- 33 -
Zone 221
NGC 6822
Other Names: Barnard's Galaxy, IC4895, PGC 63616
Astronomical League Program: Caldwell Club
Rating: 5 D
Position: 1945-1448
Type: Gal
Surface brightness: 14.8
Class: IB(s)m IV-V
Dimensions: 10' x 20'
Magnitude: 11.0
PA: 5
Notes:
A member of the Local Group, it was found by E. E. Barnard in 1884 with a 5"
refractor!
It is 12,000 light years in diameter.
Observations:
C8 at 65x. It runs N-S. The N end may be a little brighter.
Model (where the Sun is a baseball):
Its diameter would be 4 million miles.
Distance (LY): 2,200,000
Radial velocity (km/sec): +98
Luminosity (suns): 100,000,000
NGC 6835
Other Names: PGC 63800
Rating: 5 D
Position: 1955-1234
Type: Gal
Surface brightness: 12.7
Class: SB(s)a? sp
Dimensions: 2.7' x 0.5'
Magnitude: 12.5
PA: 70
Notes:
This galaxy produced supernova 1962J.
Observations:
C8 at 104x. It was an extremely faint and difficult spindle.
Radial velocity (km/sec): +1,611
- 34 -
Zone 221
Zone 221 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
STF 2439
1905-0709
2E
1
Bur 140
1917-1058
2E
2
STF 2519
1928-0932
2E
1
STF 2425
1901-0807
3E
1
h5090
1906-1043
3E
2
h5096
1912-1035
3E
2
h881
1918-0525
3E
1
STF 2547
1939-1020
3E
4
STF 2545
1939-1006
3E
4
Harvard 155
1958-0903
3E
3
Bur 1475
1958-0904
3E
3
STF 2494 rej
Hipparcos
2761
1920-0638
4E
1
1927-1308
4E
2
STF 2541
1937-1027
4E
4
A 106
1938-0535
4E
3
SI 45
1943-0818
4E
3
STF 2565
Hipparcos
2811
1946-1314
4E
4
1947-1129
4E
4
Component
A
B
A
B
C
BC
A
B
A
B
A
B
A
B
A
B
C
D
a
A
B
C
A
B
C
A
B
C
D
CD
A
B
C
D
A
B
A
B
A
B
A
B
A
B
A
B
A
B
- 35 -
Mag
8.56
10.04
6.93
10.96
10.60
8.38
8.54
7.92
8.64
9.49
9.50
8.89
9.93
7.40
9.92
10.10
13.30
10.75
8.08
9.48
11.14
6.61
8.63
11.40
7.56
9.41
8.00
11.30
7.56
9.41
6.59
11.30
6.90
10.30
9.34
10.07
8.38
9.81
9.19
11.41
7.07
7.51
9.30
9.50
10.06
10.25
Separation
—
22.0 +
—
44.9 +
PA
—
199 =
—
308 -
7.8 +
—
11.6 +
—
29.9 —
12.6 +
—
18.0 +
—
32.2 87.5
208 —
125 +
—
178 —
247 +
—
74 +
—
340 =
87.5
15.9 +
—
20.8 +
49.8 —
3.7 +
26.1 —
10.4 +
112.3 +
62 =
—
331 49.8 —
326 +
26.1 —
113 =
112.3 +
5.1 —
10.4 +
115 +!!
5.1 —
25.8 —
12.0 +?
—
5.5 +
—
57.3 —
96.7 +
—
5.5 +
—
16.2 =
158 =
—
113 +
115 +!!
5.1 —
88 +
—
121 +!?
—
326 —
3—
146 —
40 +
—
201 -
Zone 221
Designation
Hipparcos
2814
Position
Rating
Map
1948-1434
4E
4
STF 2581 rej
1950-1125
4E
4
Hussey 77
1951-1047
4E
4
STF 2591
1953-0600
4E
3
h602
1955-1223
4E
4
57 Aql
1955-0814
4E
3
Schjellerup 23
1956-0643
4E
3
STF 2602
1956-1321
4E
4
Hough 100
1911-1209
5E
2
h2860
1917-1134
5E
2
Barton 492
1917-0713
5E
1
26 Aql
1921-0524
5E
1
Hussey 73
1923-1000
5E
1
Glasenapp 8
1925-1438
5E
2
h892
1938-0819
5E
3
Leavenworth
21
1938-0958
5E
3
Hough 579
Hipparcos
2824
1943-0904
5E
3
1950-1456
5E
4
STF 2503
1923-0708
3M
1
12 Aql
1902-0549
4M
1
A 98
Hipparcos
2695
1914-0843
4M
1
1900-0824
5M
Component
A
B
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
C
BC
A
B
C
A
B
A
B
A
B
A
B
C
BC
A
B
1
- 36 -
Mag
8.54
10.58
7.26
10.69
9.36
11.80
9.42
8.74
9.23
9.75
10.60
5.80
6.49
9.14
10.71
9.26
9.82
9.00
7.95
10.68
10.17
9.97
10.07
10.86
4.98
13.07
10.04
10.92
11.00
9.24
10.41
9.16
11.80
7.22
10.77
11.46
8.83
9.88
10.49
8.18
11.01
8.78
9.65
4.01
7.30
6.54
11.08
11.10
8.71
11.40
Separation
—
18.2 +
—
43.5 +!
—
0.4 28.1 —
29.5 +
—
6.8 —
35.6 —
36.5 +
—
12.2 +
131.3
—
4.9 +
—
21.2 +
—
5.3 =
—
116
—
0.9 7.8 =
—
24.3 +
—
23.2 —
82.2 +
PA
—
139 +
—
286 +
—
320 +
28.1 —
107 —
313 —
170 —
25 +
—
148 131.3
—
327 —
110 +
—
189 —
9
—
220 7.8 =
—
68 —
14 =
—
286 =
3.8 =
—
2.7 +
63.5 +
—
14.0 +
—
2.4 —
3
—
26.0 -
284 +
—
306 63.5 +
—
333 —
285 +
—
192
—
128 =
1.1 —
10.8 -
60 +
—
105 =
Zone 221
Designation
Position
Rating
Map
Hough 104
1922-0735
5M
1
STF 2597
Jonckheere
482
1955-0644
3D
3
1910-1233
5D
2
Hough 575
1919-0546
5D
1
56 Aql
1954-0834
5D
3
Component
A
B
C
A
B
C
A
B
A
B
A
B
Mag
8.53
9.50
10.84
6.49
7.53
13.50
10.71
12.00
7.98
11.90
5.76
12.32
Separation
—
0.2 5.1 —
0.4 13.6
—
2.8 +
—
5.9 +
—
46.4 -
PA
—
310 -!!
5.1 —
106 +
13.6
—
295 =
—
11 +
—
76 -
Deep Space Objects
Object
NGC 6818
PK 31-10.1
Barnard 133
PK 26-11.1
NGC 6814
NGC 6836
NGC 6751
IC 4846
NGC 6821
Palomar 11
NGC 6822
NGC 6835
Position
1944-1409
1927-0635
1906-0650
1919-1106
1943-1019
1955-1241
1906-0600
1916-0859
1944-0649
1945-0800
1945-1448
1955-1234
Rating
2E
4E
5M
4D
4D
4D
5D
5D
5D
5D
5D
5D
Map
4
1
1
2
4
4
1
1
3
3
4
4
Type
Pn (4)
Pn (2)
Dn
Pn
Gal (SAB(s)bc I-II)
Gal (SABm)
Pn (3)
Pn (2)
Gal (SB(s)d:)
Gc (11)
Gal (IB(s)m IV-V)
Gal (SB(s)a? sp)
- 37 -
Specifications
Surface
Mag
Br
9.9
12.4
—
13.3
12.2
13.5
12.9
13.6
12.5
12.0
13.1
13.3
11.0
12.5
14.8
12.7
Population