Zone 173, Master Map
+16°00'
Normal View
Zone Master, Normal View, 10 deg FOV
+14°00'
ε
ζ
π
e
c
χ
ω2
φ
γ
α
ω1
Tarazed
+10°00'
ο
He
+12°00'
ψ
Altair
υ
f
+08°00'
ξ
d
µ
Alshain
+06°00'
β
σ
θ1
θ2
20h 00m
19h 52m
19h 44m
19h 36m
19h 28m
19h 20m
19h 12m
19h 04m
Zone 173, Map 1
Normal Image
Epsilon Aql ε
OSS 178
STF 2443
STF 2518
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 2428
STF 2489
+14°00'
OSS 180
STF 2506 rej
A. G. 379
ζ
Zeta Aql
Jonckheere 1279
STF 2520
Cogshall 2
A. G. 383
+13°00'
A. G. 374
STF 2426
STF 2432 rej
+12°00'
28 Aql
A. G. 382
31 Aql
Jonckheere 2170
h1359
+11°00'
ω2
NGC 6738
NGC 6738
ω1
A. G. 371
Bur 466
PK45-2.1
PK 45- 2.1
19h 30m
19h 25m
h884
19h 20m
19h 15m
19h 10m
19h 05m
19h 00m
Zone 173, Map 1
Mirror Image
ε
Epsilon Aql
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
OSS 178
STF 2428
STF 2443
STF 2518
STF 2489
A. G. 374
STF 2520
STF 2426
Jonckheere 1279
+13°00'
A. G. 379
Zeta Aql ζ
+14°00'
OSS 180
STF 2506 rej
Cogshall 2
STF 2432 rej
A. G. 382
31 Aql
Jonckheere 2170
NGC 6738
h1359
ω2
+11°00'
ω1
A. G. 371
Bur 466
h884
19h 00m
19h 05m
+12°00'
A. G. 383
28 Aql
19h 10m
19h 15m
19h 20m
PK45-2.1 PK 45- 2.1
19h 25m
19h 30m
Zone 173, Map 2
Normal Image
h884
STF 2510
h889
OS 370
A. G. 229
Sola 1
h876
h5509
h878
h2854
STF 2468
STF 2435
STF 2436
+08°00'
Ball 36
h2873
+09°00'
PK45-2.1
PK 45- 2.1
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
STF 2471
STF 2449
NGC 6781
PK41-2.1
STF 2446
NGC 6781
+06°00'
Hough 576
+07°00'
h2852
STF 2497
Schjellerup 21
19h 30m
19h 25m
19h 20m
19h 15m
NGC 6756 NGC 6756
19h 10m
19h 05m
19h 00m
Zone 173, Map 2
Mirror Image
h884
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
PK45-2.1 PK 45- 2.1
STF 2510
h889
Sola 1
h876
STF 2435
STF 2436
h2854
h5509
STF 2468 h878
Ball 36
h2873
STF 2471
+08°00'
A. G. 229
+09°00'
OS 370
+07°00'
h2852
STF 2449
NGC 6781
PK41-2.1NGC 6781
Hough 576
+06°00'
STF 2446
STF 2497
Schjellerup 21
19h 00m
19h 05m
NGC 6756
NGC 6756
19h 10m
19h 15m
19h 20m
19h 25m
19h 30m
Zone 173, Map 3
Normal Image
STF 2596
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
PK 52-4.1
PK 51- 3.1
A. G. 392
Barton 1953
+14°00'
Barton 1321
A. G. 389
Hough 452
+13°00'
ψ
NGC 6843
NGC 6840
Schjellerup 24
A. G. 386
Pi Aql
STF 2593 rej
NGC 6837
φ
+12°00'
STF 2567
χ
π
Chi Aql
A. G. 384
Phi Aql
Bur 266
+11°00'
h1458
Barnard 143
STF 2570
γ
Tarazed
STF 2558 rej
Gamma Aql
ο
STF 2590
h893
PK46-4.1
NGC 6803
A. G. 391
20h 00m
19h 55m
19h 50m
19h 45m
19h 40m
19h 35m
19h 30m
Zone 173, Map 3
Mirror Image
+15°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
PK 52-4.1
PK 51- 3.1
A. G. 392
Barton 1321
+14°00'
Barton 1953
ψ
+13°00'
A. G. 389
Hough 452
+12°00'
STF 2567
NGC 6843
NGC 6840
A. G. 386
χ
π
Chi Aql
Pi Aql
STF 2593 rej
NGC 6837
A. G. 384
φ
Bur 266
+11°00'
Phi Aql
Barnard 143
STF 2558 rej
STF 2570
Tarazedγ
Gamma Aql
STF 2590
h893
PK46-4.1
NGC 6803 NGC 6803
19h 30m
ο
A. G. 391
19h 35m
19h 40m
19h 45m
19h 50m
19h 55m
20h 00m
Zone 173, Map 4
Normal Image
PK46-4.1
NGC 6803
A. G. 391
PK45-4.1
NGC 6804 NGC 6804
Jonckheere 1183
Alpha Aqlα
Altair
+09°00'
h893
+10°00'
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
h897
ξ
STF 2562
A. G. 241
A 1185
Holmes 24
STF 2544
A 1184
+08°00'
Mitchell 9
υ
µ
Mu Aql
+07°00'
Jonckheere 2189
β
Bur 650
Jonckheere 1684
Alshain
Bur 828
STF 2543
NGC 6807
PK42-6.1
+06°00'
Beta Aql
NGC 6807
h2919
σ
Baillaud 2956
STF 2566 rej
20h 00m
19h 55m
19h 50m
19h 45m
Howe 50
19h 40m
19h 35m
19h 30m
Zone 173, Map 4
Mirror Image
Sky charts generated by TheSky Software; used by permission of Software Bisque Inc.
+10°00'
h893
PK46-4.1
NGC 6803 NGC 6803
A. G. 391
h889
PK45-4.1
NGC 6804
NGC 6804
α
ξ
STF 2562
STF 2544
Mitchell 9
A. G. 241
+08°00'
A 1185
Holmes 24
Altair
Alpha Aql
h897
A 1184
+09°00'
Jonckheere 1183
υ
+07°00'
Mu Aqlµ
Bur 650
β
Jonckheere 1684
Alshain
+06°00'
Beta Aql
Bur 828
STF 2543
NGC 6807
PK42-6.1
NGC 6807
σ
Baillaud 2956
Howe 50
19h 30m
19h 35m
19h 40m
STF 2566 rej
19h 45m
19h 50m
19h 55m
20h 00m
Zone 173
2 Reference Stars, 78 Double Stars, 6 Planetary Nebulae,
4 Open Clusters, 1 Dark Nebula
Flamsteed
C
28 Aql .................................................... 3
31 Aql .................................................... 5
Chi Aql................................................. 34
Cogshall 2 ............................................ 11
A
G
A 1184 ................................................. 49
A 1185 ................................................. 44
A. G. 229 ............................................. 21
A. G. 241 ............................................. 45
A. G. 371 ............................................... 6
A. G. 374 ............................................. 10
A. G. 379 ............................................... 8
A. G. 382 ............................................... 9
A. G. 383 ............................................. 11
A. G. 384 ............................................. 28
A. G. 386 ............................................. 28
A. G. 389 ............................................. 34
A. G. 391 ............................................. 30
A. G. 392 ............................................. 36
Alpha Aql ............................................ 48
Gamma Aql.......................................... 35
H
h1359 ................................................... 13
h2852 ................................................... 19
h2854 ................................................... 23
h5509 ................................................... 19
h876 ..................................................... 20
h878 ..................................................... 21
h884 ..................................................... 23
h889 ..................................................... 22
h893 ..................................................... 30
h897 ..................................................... 44
Holmes 24 ............................................ 47
Hough 452............................................ 33
Hough 576............................................ 24
Howe 50............................................... 43
B
Baillaud 2956....................................... 46
Ball 36.................................................. 25
Barnard 143 ......................................... 38
Barton 1321 ......................................... 37
Barton 1953 ......................................... 31
Beta Aql............................................... 49
Bur 266 ................................................ 37
Bur 466 ................................................ 12
Bur 650 ................................................ 47
Bur 828 ................................................ 45
J
Jonckheere 1183 .................................. 46
Jonckheere 1279 .................................. 14
Jonckheere 1684 .................................. 43
Jonckheere 2170 .................................. 13
M
Mu Aql................................................. 41
N
NGC 6738 ............................................ 14
NGC 6781 ............................................ 26
-1-
Zone 173
NGC 6803............................................ 39
NGC 6804............................................ 51
NGC 6807............................................ 51
NGC 6837............................................ 39
NGC 6840............................................ 40
NGC 6843............................................ 40
STF 2443................................................ 4
STF 2446.............................................. 16
STF 2449.............................................. 15
STF 2468.............................................. 20
STF 2471.............................................. 18
STF 2489................................................ 4
STF 2497.............................................. 16
STF 2506 rej .......................................... 7
STF 2510.............................................. 15
STF 2518................................................ 8
STF 2520.............................................. 12
STF 2543.............................................. 41
STF 2544.............................................. 42
STF 2558 rej ........................................ 33
STF 2562.............................................. 42
STF 2567.............................................. 31
STF 2570.............................................. 29
STF 2590.............................................. 32
STF 2593 rej ........................................ 32
O
OS 370 ................................................. 18
OSS 180................................................. 7
P
Phi Aql................................................. 28
Pi Aql................................................... 38
PK 45- 2.1............................................ 27
PK 51- 3.1............................................ 39
S
Sola 1 ................................................... 21
STF 2426 ............................................... 4
STF 2428 ............................................... 9
STF 2432 rej .......................................... 6
STF 2435 ............................................. 24
STF 2436 ............................................. 17
Z
Zeta Aql ............................................... 10
-2-
Zone 173
Zone 173, Map 1
Double Stars
Easy
28 Aql
V1208 Aql; OSS 179; South 717; HD 181333; SAO 104722
Position: 1920+1222
A
B
C
Magnitude
5.53
9.02
12.90
Separation
—
59.9 1,912.0
PA
—
175 105
Year
—
1991
1912
Rating: 1 E
Spectra
F0 III
Notes:
AB 1822: 60 @ 177. 18
measurements. The primary is a Delta
Scuti variable.
AC 1 measurement.
Observations:
C8 at 83x. Webb: Y, B or Y, L(?).
Scale model (in which the Sun is the size
of a baseball):
Diameter: A = 23.7 inches.
Separation: AB = 32.4 miles; AC = 1,035
miles.
South 717 (28 Aql)
Observed with C8
Magnification: 100x
Distance (LY): 347
Total luminosity (Suns): 62
-3-
Colors
Y!!
dB!!
No
Zone 173
STF 2426
Rating: 2 E
ADS 11916; HD 176486; SAO 104332
Position: 1900+1253
A
B
Magnitude
7.26
9.14
Separation PA
—
—
16.7 160 =
Year
—
1992
Spectra
K5 III
F
Colors
dO!!
B!!
Notes:
1829: 16.9 @ 260. 50 measurements. The stars show a similar, but small, proper
motion.
There is a dim (13.30m) companion to B at 3.1 @ 168 (1905). 4 measurements.
Observations:
C8 at 83x. Webb: rY, W.
STF 2443
Rating: 3 E
ADS 11999; HD 177434; SAO 104432
Position: 1904+1447
A
B
Magnitude
8.28
9.00
Separation PA
—
—
6.6 +
313 =
Year
—
1994
Spectra
F5
Colors
Y
rO
Notes:
1829: 6.3 @ 313. 31 measurements. The stars share common proper motion.
Observations:
C8 at 83x. Rich field.
STF 2489
Rating: 3 E
ADS 12248; HD 180555; SAO 104668
Position: 1916+1432
A
B
Magnitude
5.65
9.55
Separation PA
—
—
8.1 345 -
-4-
Year
—
1994
Spectra
B9 V
F8 V
Colors
Y
O
Zone 173
Notes:
1828: 8.2 @ 349. 25 measurements. The primary rotates at 147 kps. The stars share
a small proper motion.
Observations:
C8 at 83x. Moderate field. Webb: W, ?. Very delicate. Franks: B, ?. Hartung: Y,
pR.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.60 inches; B = 16.4 inches.
Separation: AB = 4.70 miles.
Distance (LY): 372
Total luminosity (Suns): 67
31 Aql
OS 588; HD 182572; SAO 104807
Position: 1925+1154
A
B
C
Magnitude
5.16
8.70
10.60
Separation
—
98.5 -!!
135.3 +!
Rating: 3 E
PA
—
300 -!!
286 -!
Year
—
1999
1989
Spectra
G5 IV
G0
Colors
Y
W
W
Notes:
AB 1852: 142.5 @ 4. 11 measurements. The stars have a large difference in proper
motion.
AC 1909: 113.7 @ 322. 3 measurements.
This star is a member of the 61 Cygni group.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches; B = 17.6 inches.
Separation: AB = 7.53 miles; AC = 10.3 miles.
Distance (LY): 49
Total luminosity (Suns): 1.63
-5-
Zone 173
STF 2432 rej
Rating: 4 E
ADS 11952; HD 176873; SAO 104379
Position: 1902+1232
A
B
C
Magnitude
6.83
10.32
13.10
Separation
—
15.7 +
20.3
PA
—
91 +
164
Year
—
1991
1904
Spectra
B9 IV
Colors
W
dB
No
Notes:
AB 1904: 14.6 @ 87. 10 measurements.
AC 1 measurement.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 24.0 miles; AC = 31.0 miles.
Distance (LY): 980
Total luminosity (Suns): 166
A. G. 371
Jonckheere 477; ADS 12000; HD 230579;
Position: 1904+1106
A
B
Magnitude
9.09
10.50
Rating: 4 E
Separation PA
—
—
5.5 +
160 +
Year
—
1986
Spectra
B1.5:IV:
Colors
W
O
Notes:
1893: 5.3 @ 158. 11 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 14.4 inches.
Separation: AB = 20.0 miles.
Distance (LY): 2,330
Total luminosity (Suns): 125
-6-
Zone 173
OSS 180
Rating: 4 E
HD 231195; SAO 104744
Position: 1921+1425
A
B
Magnitude
7.71
8.82
Separation PA
—
—
79.8 266 =
Year
—
1991
Spectra
F5 Ia
Colors
Y
B
Notes:
1874: 80.2 @ 266. 15 measurements.
Hipparcos/Tycho data show different distances for these stars (1,660 and 960 light
years); they may be optical.
Observations:
C8 at 104x. Moderate field to the NE.
STF 2506 rej
Rating: 4 E
HD 231231; SAO 104765
Position: 1922+1422
A
B
Magnitude
9.56
10.46
Separation PA
—
—
17.4 +
350 -
Year
—
1991
Spectra
F2
Colors
W
W?
Notes:
1843: 16.3 @ 351. 13 measurements. The stars have a small difference in proper
motion.
Observations:
C8 at 104x. Very rich and bright field to the NW.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.8 inches.
Separation: AB = 3.06 miles.
Distance (LY): 113
Total luminosity (Suns): 0.3
-7-
Zone 173
STF 2518
Rating: 4 E
ADS 12429; HD 182808; SAO 104821
Position: 1926+1436
A
B
Magnitude
8.09
10.55
Separation PA
—
—
5.5 +
352 -
Year
—
1991
Spectra
F5
Colors
yW
O
Notes:
1829: 5.0 @ 1. 14 measurements.
Observations:
C8 at 83x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.1 inches.
Separation: AB = 2.49 miles.
Distance (LY): 291
Total luminosity (Suns): 4.1
A. G. 379
Rating: 4 E
HD 231460; SAO 104855
Position: 1927+1359
A
B
Magnitude
9.58
11.02
Separation PA
—
—
12.7 92 -
Year
—
1991
Spectra
F8
Colors
W
O
Notes:
1893: 13.7 @ 120. 5 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.4 inches.
Separation: AB = 4.43 miles.
Distance (LY): 224
Total luminosity (Suns): 1.07
-8-
Zone 173
A. G. 382
Rating: 4 E
ADS 12489; HD 231517
Position: 1928+1204
A
B
Magnitude
9.42
10.48
Separation PA
—
—
10.9 +
190 =
Year
—
1991
Spectra
F2II:
Colors
W
pO
Notes:
1893: 10.4 @ 190. 3 measurements.
This system may be optical as Hipparcos shows different distances (317 and 77 light
years).
Observations:
C8 at 104x.
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.3 inches; B = 11.8 inches.
Separation: AB = 1.30 miles.
Distance (LY): 77
Total luminosity (Suns): 0.119
STF 2428
Rating: 5 E
ADS 11915; HD 176482; SAO 104333
Position: 1900+1454
A
B
Magnitude
8.20
10.30
Separation PA
—
—
6.7 +
287 +
Year
—
1994
Spectra
F2
Colors
W
B
Notes:
1822: 6.1 @ 285. 14 measurements. Hipparcos/Tycho data show different distances
for these stars; they may be optical. The stars have different proper motions.
Observations:
C8 at 104x. Bright, rich field.
-9-
Zone 173
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.8 inches.
Separation: AB = 3.82 miles.
Distance (LY): 366
Total luminosity (Suns): 7
Zeta Aql
Rating: 5 E
17 Aql; Deneb el Okab; Bur 287; ADS 12026; HD 177724; SAO 104461
Position: 1905+1352
A
B
Magnitude
2.99
11.80
Separation PA
—
—
160.8 +
77 =
Year
—
1988
Spectra
A0 Vn
Colors
W
?
Notes:
1879: 156.6 @ 77. 3 measurements. This star is a member of the Pleiades group.
The primary is an infra-red source and a rapid rotator, and a spectroscopic binary.
Observations:
C8 at 104x. Webb: "A curious stream of stars to the NW."
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 9.00 inches.
Separation: AB = 20.8 miles.
Distance (LY): 83
Total luminosity (Suns): 34.01
A. G. 374
Rating: 5 E
HD 179399; SAO 104582
Position: 1912+1348
A
B
Magnitude
9.02
11.41
Separation PA
—
—
15.4
229
Year
—
1904
Spectra
A3
Colors
W
?
Notes:
1 measurement.
Observations:
C8 at 104x. The field 5 min N is very bright and nice-- almost like an open cluster.
- 10 -
Zone 173
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.85 inches.
Separation: AB = 845 feet.
Distance (LY): 7
Total luminosity (Suns): 0.001
Cogshall 2
Rating: 5 E
HD 231511; SAO 104874
Position: 1928+1243
A
B
Magnitude
9.52
10.57
Separation PA
—
—
24.4 +
242 -
Year
—
1991
Spectra
B8
Colors
W
bW
Notes:
AB 1904: 23.2 @ 244. 6 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.66 inches.
Separation: AB = 30.5 miles.
Distance (LY): 800
Total luminosity (Suns): 15
A. G. 383
Rating: 5 E
HD 183401; SAO 104884
Position: 1929+1228
A
B
Magnitude
7.94
11.06
Separation PA
—
—
19.9 +
304 =
Notes:
1894: 19.6 @ 304. 2 measurements.
Observations:
C11 at 115x.
- 11 -
Year
—
1903
Spectra
A5
Colors
W
?
Zone 173
Distance (LY): 840
Total luminosity (Suns): 39
Moderate
Bur 466
Rating: 4 M
ADS 12021
Position: 1905+1050
A
B
Magnitude
9.02
9.58
Separation PA
—
—
2.0 +
165 +
Year
—
1999
Spectra
F0
Colors
W
O
Notes:
1877: 1.9 @ 164. 27 measurements.
Observations:
C11 at 339x. This pair is the east-most of two 9m stars.
STF 2520
Fox 241 (C); ADS 12449; SAO 104841
Position: 1927+1252
A
B
C
Magnitude
9.70
10.32
10.02
Separation
—
2.2 +
88.7 +
Rating: 4 M
PA
—
236 +
247 =
Notes:
AB 1829: 2.0 @ 235. 24 measurements.
AC 1907: 87.9 @ 247. 6 measurements.
Observations:
C11 at 339x.
- 12 -
Year
—
1999
1983
Spectra
A5
Colors
W
Y
W
Zone 173
h1359
Rating: 5 M
HD 230435; SAO 104365
Position: 1901+1136
A
B
Magnitude
9.02
13.50
Separation PA
—
—
16.7
197
Year
—
1903
Spectra
F0
Colors
Y
W?
Notes:
1 measurement.
Observations:
C11 at 98x. B was very dim. This pair lies in the open cluster NGC 6738.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.1 inches.
Separation: AB = 4.06 miles.
Distance (LY): 156
Total luminosity (Suns):
Jonckheere 2170
Rating: 5 M
HD 180585; SAO 104674
Position: 1917+1151
A
B
Magnitude
8.19
11.84
Separation PA
—
—
53.9 32 +
Year
—
1991
Spectra
A2
Colors
W
?
Notes:
1942: 60.0 @ 30. 2 measurements.
B has a 12.44m companion at 3.2 @ 53 (1991).
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.14 inches.
Separation: AB = 36.6 miles.
Distance (LY): 435
Total luminosity (Suns): 8.21
- 13 -
Zone 173
Difficult
Jonckheere 1279
Rating: 5 D
ADS 11940
Position: 1901+1253
A
B
Magnitude
10.46
10.50
Separation PA
—
—
2.9 +
348 +?
Year
—
1987
Spectra
Colors
W
W
Notes:
1916: 2.5 @ 160. 7 measurements. Quadrant reversal?
Not found in 1959 by Van Biesbroeck. He suggests it may be ADS 12017. Found by
Heintz 1997, who notes that the Olevic pair at 19 02.6 +12 56, is identical.
Observations:
C11 at 634x.
Deep Sky Objects
Moderate
NGC 6738
Other Names: Collinder 396
Rating: 5 M
Position: 1901+1136
Type: Oc
Dimensions: 15'
Class: IV 2p
Cluster population: 25
Magnitude: 8.5
Observations:
C8 at 65x. It is sparse, but with two arms. Steve Coe describes the brightness of this
cluster as "a step function magnitude distribution. I have rarely seen a star cluster that
does not seem to gradually fade to dimmer members." (A step function is a mathematical
function where the values change suddenly; the graph resembles a set of steps or
staircase, hence the name. Compare this to the smooth sine wave or other continuous
distribution functions.) Rich field.
- 14 -
Zone 173
Zone 173, Map 2
Double Stars
Easy
STF 2449
Rating: 1 E
ADS 12037; HD 177904; SAO 124265
Position: 1906+0709
A
B
Magnitude
6.71
7.36
Separation PA
—
—
8.3 +
290 -
Year
—
1999
Spectra
F2 V Y
F2 dB!!
Colors
Notes:
1829: 8.0 @ 292. 58
measurements. The stars show similar
proper motions.
Observations:
C8 at 104x.
STF 2449
Observed with C8 on 8/10/99; s7, t7
Magnification: 100x
STF 2510
Rating: 2 E
ADS 12379; HD 182220; SAO 124572
Position: 1923+0930
A
B
Magnitude
7.90
9.10
Separation PA
—
—
8.7 181 -
- 15 -
Year
—
1991
Spectra
A0
A0
Colors
L
B
Zone 173
Notes:
1829: 8.8 @ 2. 25 measurements. The stars show similar proper motions. Quadrant
reversal?
Aitken says B is double (9.6m, 0.2” @ 195 in 1905; 9 measurements.).
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.08 inches; B = 6.53 inches.
Separation: AB = 8.01 miles.
Distance (LY): 590
Total luminosity (Suns): 26
STF 2446
Rating: 3 E
ADS 12029; HD 177749; SAO 124257
Position: 1906+0633
A
B
C
Magnitude
6.75
8.72
10.20
Separation
—
9.4 36.4 +
PA
—
153 346 +
Year
—
1991
1987
Spectra
F5
Colors
W
W
?
Notes:
AB 1825: 9.7 @ 156. 54 measurements. The stars share common proper motion.
AC 1905: 34.5 @ 341. 3 measurements.
Observations:
C8 at 65x. Webb: W, B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 12.0 inches.
Separation: AB = 2.93 miles; AC = 11.4 miles.
Distance (LY): 200
Total luminosity (Suns): 7
STF 2497
Rating: 3 E
HD 181365; SAO 124514
Position: 1920+0535
A
B
Magnitude
7.59
8.52
Separation PA
—
—
30.0 =
357 -
- 16 -
Year
—
1991
Spectra
G5
G5
Colors
W
B
Zone 173
Notes:
1830: 30.0 @ 358. 24 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; a fine object.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.9 inches; B = 20.0 inches.
Separation: AB = 43.1 miles.
Distance (LY): 920
Total luminosity (Suns): 87
STF 2436
Rating: 4 E
ADS 11947; HD 176916; SAO 124181
Position: 1902+0845
A
B
C
D
CD
Magnitude
8.47
9.22
9.80
11.20
Separation
—
30.7 135.1 +
10.6
PA
—
314 +
301 -
Year
—
1998
1923
10
1923
Spectra
K0
F8
Colors
Y
W
W?
?
Notes:
AB 1830: 34.6 @ 309. 30 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. The stars have different proper motions.
AC 1877: 133.4 @ 302. 2 measurements.
CD 1 measurement. This pair may be the same as STF 2435 AC.
Observations:
C8 at 104x. Webb: Y, bW.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 25.0 inches; B = 16.1 inches.
Separation: AB = 177 miles; AC = 780 miles; CD = 61.2 miles.
Distance (LY): 3,700
Total luminosity (Suns): 794
- 17 -
Zone 173
STF 2471
Rating: 4 E
ADS 12129; HD 179123; SAO 124355
Position: 1911+0807
A
B
Magnitude
7.44
10.67
Separation PA
—
—
8.6 +
122 =
Year
—
1991
Spectra
A9 V
Colors
W
?
Notes:
1830: 7.6 @ 122. 19 measurements.
Observations:
C8 at 280x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.30 inches.
Separation: AB = 3.87 miles.
Distance (LY): 289
Total luminosity (Suns): 7.7
OS 370
V342 Aql; ADS 12259; HD 180660; SAO 124465
Position: 1917+0920
A
B
C
Magnitude
8.23
8.73
13.90
Separation
—
19.5 =
1,907.0
PA
—
14 78
Notes:
AB 1843: 19.5 @ 15. 37 measurements.
AC 1907: 1907.00 @ 78. 1 measurements.
B is an Algol-type system.
Observations:
C8 at 83x. Webb: R, B.
- 18 -
Rating: 4 E
Year
—
1991
1907
Spectra
K2 II
A
Colors
W
W
No
Zone 173
h5509
Rating: 4 E
ADS 12280; HD 180848
Position: 1918+0847
A
B
Magnitude
9.60
10.13
Separation PA
—
—
7.1 =
104 =
Year
—
1991
Spectra
A3
Colors
W
bW
Notes:
1903: 7.1 @ 104. 10 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 = 8.10 inches.
Separation: AB = 5.39 miles.
Distance (LY): 487
Total luminosity (Suns): 5
h2852
Position: 1903+0724
A
B
Magnitude
10.21
11.43
Rating: 5 E
Separation PA
—
—
22.5 131 -
Year
—
1901
Spectra
Colors
W
W
Notes:
1899: 22.6 @ 132. 2 measurements.
Observations:
C8 at 104x. This pair is the N vertex of a trapezoid of 9m stars that runs diagonally
across the field.
- 19 -
Zone 173
h876
Rating: 5 E
HD 178431; SAO 124309
Position: 1908+0859
A
B
Magnitude
7.55
11.26
Separation PA
—
—
30.2 =
5=
Year
—
1914
Spectra
K0
Colors
yO
?
Notes:
1904: 30.2 @ 5. 3 measurements.
Observations:
C8 at 206x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 23.6 inches.
Separation: AB = 15.1 miles.
Distance (LY): 320
Total luminosity (Suns): 7.24
STF 2468
Rating: 5 E
ADS 12114; HD 178914; SAO 124340
Position: 1910+0841
A
B
Magnitude
8.70
9.66
Separation PA
—
—
7.6 =
258 =
Year
—
1991
Spectra
G0
Colors
yO
?
Notes:
1830: 7.6 @ 258. 16 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 = 17.6 inches.
Separation: AB = 1.17 miles.
Distance (LY): 99
Total luminosity (Suns): 0.36
- 20 -
Zone 173
h878
Rating: 5 E
HD 179340
Position: 1912+0842
A
B
Magnitude
9.97
11.25
Separation PA
—
—
22.0 +
340 +
Year
—
1991
Spectra
B8
Colors
W
W
Notes:
1897: 21.5 @ 338. 8 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.77 inches.
Separation: AB = 84.1 miles.
Distance (LY): 2,450
Total luminosity (Suns): 63
A. G. 229
Position: 1922+0912
A
B
Magnitude
9.88
10.39
Rating: 5 E
Separation PA
—
—
33.2 +
163 -
Year
—
1991
Spectra
G
G
Colors
W
W
Notes:
1898: 25.7 @ 169. 13 measurements. May be optical because Hipparcos gives
different distances (50 and 180 light years).
Observations:
C8 at 104x.
Sola 1
Rating: 5 E
HD 182698; SAO 124612
Position: 1926+0907
A
B
Magnitude
9.40
9.80
Separation PA
—
—
22.8 324 -
- 21 -
Year
—
1983
Spectra
F8
F8
Colors
W
W
Zone 173
Notes:
1898: 25.5 @ 346. 9 measurements.
The stars have a large difference in proper motion.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 16.2 inches; B = 16.6 inches.
Separation: AB = 14.7 miles.
Distance (LY): 413
Total luminosity (Suns): 4
Moderate
h889
Rating: 4 M
HD 183653; SAO 124701
Position: 1930+0917
A
B
Magnitude
8.36
11.03
Separation PA
—
—
25.5 100 =
Year
—
1911
Spectra
K0
Colors
Y
W
Notes:
1898: 25.6 @ 100. 2 measurements.
Observations:
C8 at 104x. Averted vision helps in seeing B.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 24.8 inches.
Separation: AB = 19.1 miles.
Distance (LY): 480
Total luminosity (Suns): 9
- 22 -
Zone 173
h2854
Fox 237 (CD); ADS 12044; HD 178061; SAO 124279
Position: 1907+0847
A
B
C
CD
Magnitude
9.38
11.70
13.20
Separation PA
—
—
9.6 +
43 11.7
211
Rating: 5 M
Year
—
1961
Spectra
K0
Colors
Y
W
?
1909
Notes:
1898: 7.7 @ 54. 10 measurements.
CD 1 measurement.
Fox 237 is 4s faster and 1' north of h2854.
Observations:
C11 at 115x.
h884
Rating: 5 M
HD 181707; SAO 124537
Position: 1921+0949
A
B
C
BC
Magnitude
7.77
11.13
13.33
Separation PA
—
—
44.4 299 =
10.5
238
Year
—
1906
Spectra
K5
Colors
Y
?
?
1901
Notes:
AB 1901: 44.8 @ 299. 2 measurements.
BC 1 measurement.
Observations:
C8 at 83x. Moderate field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 33.8 inches.
Separation: AB = 125 miles; BC = 30.0 miles.
Distance (LY): 1,810
Total luminosity (Suns): 212
- 23 -
Zone 173
Hough 576
Rating: 5 M
ADS 12332; HD 181526; SAO 124527
Position: 1921+0639
A
B
C
Magnitude
8.22
11.50
11.58
Separation
—
3.7 43.2 -
PA
—
179 254 =
Year
—
1943
1991
Spectra
F8
Colors
W
W?
W
Notes:
AB 1894: 3.8 @ 180. 12 measurements.
AC 1906: 45.0 @ 254. 4 measurements.
Observations:
C11 at 339x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 15.2 inches.
Separation: AB = 1.41 miles; AC = 16.5 miles.
Distance (LY): 245
Total luminosity (Suns): 2.64
Difficult
STF 2435
Bur 973 (B, D); Howe 45 (CD); ADS 11947
Position: 1902+0846
A
B
C
D
Magnitude
10.59
11.54
12.30
12.80
Separation
—
1.5 +
10.9 +
8.9 -
PA
—
349 19 +
12 -
Rating: 5 D
Year
—
1991
1961
1928
Spectra
A0
Colors
W
W?
?
No
Notes:
AB 1880: 1.4 @ 351. 10 measurements.
AC 1827: 10.3 @ 12. 9 measurements.
AD 1879: 9.2 @ 13. 10 measurements.
Van Biesbroeck notes that this group is misidentified in both BDS and ADS as
BD+08@3945 rather than the correct BD+08@3948. The latter is already identified with
ADS 11954, Jonckheere 533. It seems advisable to keep the ADS number 11947. Here
- 24 -
Zone 173
AB is Bur 973, STF 2435 = AC of Jonckheere 533. AD = AB of Jonckheere 533. DC =
Howe 4
Observations:
C11 at 339x.
Ball 36
R Aql; HD 177940; SAO 124266
Position: 1906+0814
A
B
C
Magnitude
8.23
11.45
10.81
Separation
—
77 +
181 +
Rating: 5 D
PA
—
229 260 +
Year
—
1991
1959
Spectra
M7 IIIev
Colors
rO!
?
?
Notes:
AB 1878: 74 @ 295. 4 measurements. A is a Mira-type variable.
AC 1877: 180 @ 258. 4 measurements.
Observations:
C11 at 115x. Wonderful hue in the primary!
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 0.75 inches.
Separation: AB = 82.9 miles; AC = 195 miles.
Distance (LY): 690
Total luminosity (Suns): 22
- 25 -
Zone 173
Deep Sky Objects
Moderate
NGC 6781
Other Names: PK 41-2.1; H III 743
Astronomical League Program: Herschel 400 Club
Rating: 3 M
Position: 1918+0633
Type: Pn
Dimensions: 109'
Class: 3b
Magnitude: 11.8
Notes:
William Herschel discovered this planeatry in 1788.
The Earl of Rosse claims to have seen spiral structure with his 72-in telescope.
Observations:
C8 at 104x. Faint, but it takes high power fairly well. Not much detail, but just the
slightest hint of a ring. A very faint star lies to the NE. Bright stars lie half a degree east
and west.
C11 at 115x with O-III filter. It was barely visible without the filter, but quite easy
with it. Pale gray but no features to report.
Model (where the Sun is a baseball):
Its diameter would be 26,540 miles.
Distance (LY): 5,200
Luminosity (suns): 40.0
- 26 -
Zone 173
Difficult
PK 45- 2.1
Other Names: Vyssotsky 2-2
Rating: 4 D
Position: 1924+0954
Type: Pn
Dimensions: <5"
Class: 1
Magnitude: 12.7
Notes:
The central star is 13.7m.
Observations:
C8 at 104x. It is a blurry star 3 min E of a 12m star.
C11 at 193x with O-III filter. Very faint greenish oval; no central star or annulus
detected.
Distance (LY): 6,200
Luminosity (suns): 25
- 27 -
Zone 173
Zone 173, Map 3
Reference Star
Phi Aql (61 Aql; HD 188728; SAO 105438)
Position: 1956+1125
Mag : 5.28
Assumed distance: 206 light years
Spectrum : A1 IV Color : W
Assumed luminosity (suns): 25
Notes:
Star A is a spectroscopic binary with a 3.3207 day period.
Double Stars
Easy
A. G. 386
Rating: 2 E
HD 184724; SAO 105009
Position: 1935+1156
A
B
Magnitude
7.93
10.40
Separation PA
—
—
28.3 +
315 +
Year
—
1969
Spectra
K5
Colors
O!!
Y
Notes:
1893: 27.7 @ 312. 3 measurements.
Observations:
C8 at 83x. The area to the NE looks almost nebulous it is so rich.
A. G. 384
Rating: 3 E
HD 183729; SAO 104911
Position: 1931+1135
A
B
Magnitude
9.39
9.72
Separation PA
—
—
22.7 160 -
- 28 -
Year
—
1983
Spectra
A0
Colors
W
W
Zone 173
Notes:
1894: 22.8 @ 162. 9 measurements.
Observations:
C8 at 104x. Glorious field!
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.63 inches.
Separation: AB = 14.3 miles.
Distance (LY): 403
Total luminosity (Suns): 3.88
STF 2570
Rating: 3 E
ADS 12864; HD 186587; SAO 105207
Position: 1945+1046
A
B
Magnitude
7.50
9.68
Separation PA
—
—
4.2 +
277 +
Year
—
1999
Spectra
B2 V
Colors
W
R
Notes:
1827: 4.1 @ 276. 31 measurements.
Alvan G. Clark found an 8.2m companion to A in 1878 at only 0.3 @ 141. In 1991 it
was 0.2 @ 140.
Observations:
C8 at 206x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 13.2 inches.
Separation: AB = 9.17 miles.
Distance (LY): 1,400
Total luminosity (Suns): 225
- 29 -
Zone 173
A. G. 391
Rating: 3 E
HD 187130; SAO 125080
Position: 1948+1003
A
B
Magnitude
7.53
9.16
Separation PA
—
—
51.7 +
296 +
Year
—
1991
Spectra
K5
G0
Colors
D
dB!
Notes:
1906: 49.3 @ 294. 10 measurements.
The stars show similar proper motions, but Hipparcos gives different distances (2,010
and 300 light years).
Observations:
C8 at 104x. Nice colors!
h893
Rating: 4 E
ADS 12747; HD 185584
Position: 1939+1012
A
B
Magnitude
9.30
9.72
Separation PA
—
—
7.3 189 -
Year
—
1957
Spectra
K2
Colors
Y
W
Notes:
1820: 8.0 @ 195. 12 measurements.
The stars show similar proper motions.
Observations:
C8 at 104x. Nice field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 28.9 inches.
Separation: AB = 4,805 feet.
Distance (LY): 80
Total luminosity (Suns): 0.16
- 30 -
Zone 173
STF 2567
Rating: 4 E
ADS 12848; HD 186455; SAO 105193
Position: 1944+1222
A
B
Magnitude
7.94
10.38
Separation PA
—
—
18.1 =
311 -
Year
—
1991
Spectra
A2 V
Colors
yW
O
Notes:
1829: 18.1 @ 316. 18 measurements. The stars show a similar, but small, proper
motion.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 8.40 inches.
Separation: AB = 37.8 miles.
Distance (LY): 1,340
Total luminosity (Suns): 121
Barton 1953
Rating: 4 E
HD 353528
Position: 1945+1418
A
B
Magnitude
9.73
10.79
Separation PA
—
—
6.2 =
195 +
Year
—
1991
Spectra
A0
Colors
W
Y
Notes:
1933: 6.2 @ 194. 2 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 675 inches.
Separation: AB = 6.19 miles.
Distance (LY): 640
Total luminosity (Suns): 5.70
- 31 -
Zone 173
STF 2590
Jonckheere 126; ADS 13041; HD 187961; SAO 105355
Position: 1952+1021
A
B
Magnitude
6.52
10.31
Separation PA
—
—
13.5 =
309 -
Year
—
1991
Rating: 4 E
Spectra
B7 V
A3 V
Colors
Y
R
Notes:
1827: 13.5 @ 310. 15 measurements. This star is a member of the Pleiades group.
The primary spins at an incredible 300 kps.
A faint pair (11.60m, 12.20m) of 6.6 @ 272 is 2 min N of this pair and is called CD
by the U. S. Naval Observatory.
Observations:
C8 at 83x. Webb: oW, B. Sadler: W.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 10.8 inches; B = 8.10 inches.
Separation: AB = 19.0 miles.
Distance (LY): 900
Total luminosity (Suns): 170
STF 2593 rej
Rating: 4 E
ADS 13064; HD 188139; SAO 105380
Position: 1953+1150
A
B
C
Magnitude
8.80
10.10
11.40
Separation
—
12.1 3.5 -
PA
—
239 +
306 +
Notes:
AB 1901: 12.4 @ 236. 6 measurements.
BC 1901: 3.7 @ 304. 6 measurements.
Observations:
C8 at 104x. Faint but moderate field.
- 32 -
Year
—
1943
1943
Spectra
A0
Colors
W
O
No
Zone 173
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.42 inches.
Separation: AB = 8.10 miles; AC = 2.34 miles.
Distance (LY): 429
Total luminosity (Suns): 5
Hough 452
Rating: 5 E
ADS 12553; HD 183956; SAO 104931
Position: 1931+1310
A
B
C
Magnitude
8.53
11.69
11.78
Separation
—
11.1 +
22.8 +
PA
—
239 185 +
Year
—
1991
1957
Spectra
G0 V
Colors
yW
?
?
Notes:
AB 1891: 6.1 @ 245. 9 measurements.
AC 1891: 19.4 @ 180. 6 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 3.45 inches.
Separation: AB = 4.15 miles; AC = 8.53 miles.
Distance (LY): 240
Total luminosity (Suns): 1.94
STF 2558 rej
Rating: 5 E
HD 185898; SAO 105131
Position: 1941+1041
A
B
Magnitude
8.10
11.60
Separation PA
—
—
28.3 308 +
Notes:
1905: 29.0 @ 300. 3 measurements.
- 33 -
Year
—
1999
Spectra
F8
Colors
yW
?
Zone 173
Observations:
C8 at 83x. The dark nebula B143 lies N of here.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 15.1 inches.
Separation: AB = 14.3 miles.
Distance (LY): 324
Total luminosity (Suns): 5.19
A. G. 389
Rating: 5 E
HD 186077; SAO 105152
Position: 1942+1315
A
B
Magnitude
8.35
11.60
Separation PA
—
—
23.2 +
214 +
Year
—
1982
Spectra
A0
Colors
W
?
Notes:
1897: 23.0 @ 213. 5 measurements.
Observations:
C8 at 104x. A diagonal line of 9m and 10m stars meanders to the E.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 6.25 inches.
Separation: AB = 34.4 miles.
Distance (LY): 950
Total luminosity (Suns): 32
Chi Aql
Rating: 5 E
OS 380; AC = Jonckheere 1858; Holmes 26; ADS 12808; HD 186203; SAO 105168
Position: 1943+1149
A
B
C
D
E
Magnitude
5.73
6.76
12.30
11.50
10.30
Separation
—
0.4 81.7
5.0 140.0
PA
—
77 48
315 275
- 34 -
Year
—
1996
1912
1941
1941
Spectra
F5 V
A3
Colors
yW
No
?
No
W
Zone 173
Notes:
AB 1843: 0.7 @ 81. Over 100 measurements.
AC 1 measurement.
AD 1924: 9.4 @ 317. 2 measurements.
AE 1 measurement.
Star A is a spectroscopic binary.
Observations:
C8 at 104x. Moderate field.
Webb: Y.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.35 inches; B = 6.79 inches.
Separation: AB = 2,429 feet; AC = 95.6 miles; AD = 5.85 miles.
Distance (LY): 750
Total luminosity (Suns): 343.53
Gamma Aql
Rating: 5 E
50 Aql; Tarazed (Persian name for the constellation); Bpm 198; HD 186791; SAO
105223
Position: 1946+1037
A
B
Magnitude
2.72
12.77
Separation PA
—
—
132.7 +
258 =
Year
—
1907
Spectra
K2 IIe
Colors
Y!!
W?
Notes:
1879: 132.6 @ 258. 2 measurements.
The primary is an infra-red source.
From James Kaler's Star Notes:
Tarazed is a class K "bright giant," a fairly cool (4,100 Kelvin) luminous star that falls
between the classical, more ordinary, giants and the supergiants. Its radius is 110 solar. A
true giant half an Astronomical Unit across, if the star were our Sun it would extend
halfway to the orbit of the Earth and appear 60 degrees across in our sky, two-thirds of
the way from the horizon to the point overhead. It is so large that it can be detected as a
disk with an angular diameter of 0.0075 seconds of arc, which with the distance gives the
same physical diameter as above, showing all the measurements to be quite accurate.
Tarazed is a source of X-rays, and is a rare "hybrid" star rather like Sadalmelik (Alpha
Aquarii) that has characteristics of both luminous giants with cool winds and less
luminous ones that have hot outer layers more like Sun. Its luminosity and temperature
suggest a mass about five times solar. Though only a little over 100 million years old, the
- 35 -
Zone 173
star is probably already fusing helium into carbon in its core, the core ultimately to be
come a white dwarf something like the companion to Sirius.
Observations:
C8 at 104x. A nice area lies to the S.
Webb: Y!. Beautiful field with a curious double-curved row of stars a little S.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 19.5 feet.
Separation: AB = 95.5 miles.
Distance (LY): 461
Total luminosity (Suns): 2,960
Moderate
A. G. 392
Rating: 3 M
ADS 12976; HD 187403
Position: 1949+1428
A
B
Magnitude
9.58
9.74
Separation PA
—
—
3.5 154 +
Year
—
1999
Spectra
A2
Colors
W
W
Notes:
1903: 4.2 @ 153. 15 measurements.
Observations:
C8 at 206x. A delicious knot of faint but dense stars lies 10 min SW.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.73 inches.
Separation: AB = 3,696 feet.
Distance (LY): 129
Total luminosity (Suns): 0.360
- 36 -
Zone 173
Bur 266
Rating: 3 M
ADS 13168; HD 189093; SAO 105474
Position: 1958+1125
A
B
Magnitude
7.53
11.50
Separation PA
—
—
15.8 +
167 =
Year
—
1975
Spectra
A3
Colors
W
pB
Notes:
1875: 15.7 @ 167. 7 measurements.
Observations:
C8 at 206x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.17 inches.
Separation: AB = 13.3 miles.
Distance (LY): 540
Total luminosity (Suns): 31
Barton 1321
Rating: 4 M
HD 232051
Position: 1938+1422
A
B
Magnitude
10.33
10.74
Separation PA
—
—
4.5 158 +
Year
—
1991
Spectra
F8
Colors
W
W
Notes:
1897: 4.6 @ 156. 8 measurements.
Observations:
C8 at 104x. A tiny knot of dim stars lies 10 min SSE. With a casual glance, it looks
grainy.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 17.0 inches.
Separation: AB = 1.27 miles.
Distance (LY): 181
Total luminosity (Suns): 0.8
- 37 -
Zone 173
Difficult
Pi Aql
52 Aql; STF 2583; ADS 12962; HD 187259; SAO 105282
Position: 1949+1149
A
B
C
Magnitude
5.75
6.79
12.45
Separation
—
1.4 33.6 +
PA
—
105 304 -
Year
—
1999
1911
Rating: 4 D
Spectra
F2 V
A2 V
Colors
B
B
?
Notes:
AB 1829: 1.5 @ 121. Over 100 measurements. The orbit takes over 30 years.
AC 1886: 31.8 @ 308. 3 measurements.
Observations:
C8 at 206x. Webb: Y. Phillips: Y, G. Smyth: W, G. Secchi: Y, B. Dembowski:
W, W or rW, bW.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.10 inches; B = 8.40 inches.
Separation: AB = 1.24 miles; AC = 29.9 miles.
Distance (LY): 570
Total luminosity (Suns): 165.33
Deep Sky Objects
Moderate
Barnard 143
Rating: 3 M
Position: 1941+1057
Type: Dn
Dimensions: 30'
Observations:
C8 at 104x. A very rich field that suddenly blacks out!
Distance (LY): 2,500
- 38 -
Zone 173
PK 51- 3.1
Other Names: Minkowski 1-73
Rating: 5 M
Position: 1941+1457
Type: Pn
Dimensions: 5.4'' x 4.8''
Class: 2
Magnitude: 13.7
Observations:
C8 at 206x. It appeared as a fuzzy star with averted vision. It is uniform at 200x, and
after confirming at 200x, was noticeable at 104x.
Distance (LY): 10,600
Total luminosity (Suns): 29
NGC 6837
Other Names: OCL 108; H VIII 18
Rating: 5 M
Position: 1954+1141
Type: Oc
Dimensions: 3'
Class: IV 1p:b
Magnitude: 13.0
Notes:
LIsted as "non-existant" in the RNGC.
Observations:
C11 at 140x. A very sad little group of 8 stars, washed out by a rich field.
Difficult
NGC 6803
Other Names: PK 46-4.1
Rating: 5 D
Position: 1931+1003
Type: Pn
Dimensions: 4"
Class: 2a
Magnitude: 11.4
- 39 -
Zone 173
Notes:
Edward Pickering discovered it in 1882.
Observations:
C8 at 83x. Small, faint. Three bright stars lie 25 min to the ESE.
C11 at 115x with O-III filter. A most difficult object even with the filter! Very faint
and small, not much brighter in the center. No annulus detected.
Model (where the Sun is a baseball):
Its diameter would be 32 miles.
Distance (LY): 5,200
Luminosity (suns): 58
NGC 6840
Other Names: H VIII 19
Rating: 5 D
Position: 1954+1202
Type: Oc
Cluster population: 20
Magnitude: 11.0
Dimensions: 5'
Notes:
Probably an asterism.
Observations:
C8 at 104x. Sparse, almost lost in the field. A bright star is 5 min W. Very rich field.
NGC 6843
Rating: 5 D
Position: 1956+1209
Type: Oc
Magnitude: 12.0
Notes:
Probably an asterism.
Observations:
C8 at 104x. It is a nebulous patch which is not helped by high power at all.
C11 at 115x. Very sparse and faint, it is dominated by a four-star arc and some
background haze.
- 40 -
Zone 173
Zone 173, Map 4
Reference Star
Mu Aql (38 Aql; Bur 653; HD 184406; SAO 124799)
Position: 1934+0723
Mag : 4.45
Spectrum : K3 III Color : yW
Assumed distance: 111 light years
Assumed luminosity (suns): 15
Observations:
C8 at 104x.
Double Stars
Easy
STF 2543
Rating: 3 E
ADS 12661; HD 184853; SAO 124835
Position: 1936+0600
A
B
Magnitude
6.62
10.71
Separation PA
—
—
11.9 151 -
Year
—
1995
Spectra
G8 III
M0
Colors
Y
?
Notes:
1830: 12.7 @ 158. 16 measurements.
Observations:
C8 at 83x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 43.5 inches; B = 46.3 inches.
Separation: AB = 16.5 miles.
Distance (LY): 890
Total luminosity (Suns): 148
- 41 -
Zone 173
STF 2544
Rating: 3 E
ADS 12679; HD 185063; SAO 124854
Position: 1937+0819
A
B
C
Magnitude
8.62
9.88
9.30
Separation
—
1.0 14.1 -
PA
—
188 238 -
Year
—
1999
1986
Spectra
A3
Colors
W
No
B!
Notes:
AB 1825: 1.3 @ 221. 61 measurements. The stars show a similar, but small, proper
motion.
AC 1825: 16.1 @ 239. 46 measurements.
Observations:
C8 at 104x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 7.67 inches.
Separation: AB = 1.00 mile; AC = 13.9 miles.
Distance (LY): 630
Total luminosity (Suns): 13
STF 2562
Rating: 3 E
ADS 12813; HD 186226; SAO 124966
Position: 1943+0823
A
B
C
Magnitude
6.89
8.70
12.30
Separation
—
27.0 81.7
PA
—
71 -?
294
Year
—
1999
1908
Spectra
F5 V
G0 V
Colors
W
B
?
Notes:
AB 1822: 28.0 @ 252. 37 measurements. Hipparcos/Tycho data show different
distances for these stars; they may be optical. However, the stars show similar proper
motion. Quadrant reversal?
AC 1 measurement.
Observations:
C8 at 83x. Webb: Y, W.
- 42 -
Zone 173
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.35 inches; B = 17.6 inches.
Separation: AB = 9.18 miles; AC = 27.8 miles.
Distance (LY): 218
Total luminosity (Suns): 7.744
Jonckheere 1684
Position: 1943+0627
A
B
Magnitude
11.04
12.10
Rating: 3 E
Separation PA
—
—
6.3 +
243 +
Year
—
1999
Spectra
Colors
W
W
Notes:
1908: 6.0 @ 240. 4 measurements.
Observations:
C8 at 206x. This is the S star of a small 9m trapezoid of stars.
Howe 50
Rating: 3 E
ADS 12814; HD 186208; SAO 124970
Position: 1943+0502
A
B
Magnitude
10.06
10.60
Separation PA
—
—
2.6 +
18 =
Notes:
1879: 2.4 @ 18. 15 measurements.
Observations:
C11 at 193x.
- 43 -
Year
—
1991
Spectra
A3
Colors
W
W
Zone 173
A 1185
Rating: 4 E
ADS 12582
Position: 1933+0831
A
B
Magnitude
9.56
10.16
Separation PA
—
—
3.4 +
193 =
Year
—
1999
Spectra
A5
Colors
W
pB
Notes:
1905: 3.3 @ 193. 12 measurements.
Observations:
C11 at 115x.
h897
Rating: 4 E
HD 186905; SAO 125056
Position: 1947+0845
A
B
Magnitude
9.73
10.22
Separation PA
—
—
13.9 =
290 +
Year
—
1991
Spectra
G0
Colors
Y
W
Notes:
1901: 13.9 @ 289. 8 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 18.6 inches.
Separation: AB = 6.48 miles.
Distance (LY): 299
Total luminosity (Suns): 1.47
- 44 -
Zone 173
Bur 828
Rating: 4 E
ADS 12916; HD 186906
Position: 1947+0610
A
B
Magnitude
8.51
10.40
Separation PA
—
—
2.9 +
10 +
Year
—
1987
Spectra
B9
Colors
bW
W
Notes:
1881: 2.8 @ 9. 15 measurements.
Observations:
C11 at 193x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 5.18 inches.
Separation: AB = 4,594 feet.
Distance (LY): 194
Total luminosity (Suns): 1.36
A. G. 241
Rating: 4 E
HD 188125
Position: 1953+0821
A
B
Magnitude
9.90
10.40
Separation PA
—
—
10.8 =
197 +
Notes:
1894: 10.8 @ 196. 3 measurements.
Observations:
C11 at 115x.
- 45 -
Year
—
1910
Spectra
A0
Colors
W
W
Zone 173
Jonckheere 1183
Rating: 5 E
ADS 12801
Position: 1942+0920
A
B
C
Magnitude
10.60
13.50
11.42
Separation
—
2.5 17.2 =
PA
—
329 +
60 -
Year
—
1957
1934
Spectra
B8
Colors
W
No
W?
Notes:
AB 1915: 2.8 @ 324. 2 measurements.
AC 1906: 17.2 @ 61. 3 measurements.
Observations:
C8 at 104x. An 8.4m star 18 min SE is a good skymark.
Baillaud 2956
Position: 1957+0514
A
B
Magnitude
10.36
11.20
Rating: 5 E
Separation PA
—
—
9.7 =
246 -
Year
—
1988
Spectra
G5
Colors
yW
W
Notes:
1910: 9.7 @ 249. 4 measurements.
Observations:
C11 at 115x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 22.1 inches.
Separation: AB = 3,115 feet.
Distance (LY): 39
Total luminosity (Suns): 0.01
- 46 -
Zone 173
Moderate
Bur 650
Fox; ADS 12569; HD 184026; SAO 124745
Position: 1932+0630
A
B
C
D
E
Magnitude
8.15
11.10
9.70
12.12
10.09
Separation
—
5.9 10.9 27.5 +
88.8 +
Rating: 5 M
PA
—
146 +
327 253 274 =
Year
—
1988
1988
1988
1991
Spectra
A0 IV
Colors
bW
?
W
?
No
Notes:
AB 1891: 6.6 @ 144. 7 measurements.
AC 1891: 11.6 @ 332. 5 measurements.
AD 1891: 26.6 @ 255. 5 measurements.
AE 1908: 88.3 @ 274. 9 measurements.
Observations:
C8 at 83x. Star C is very difficult.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.7 inches.
Separation: AB = 3.71 miles; AC = 6.85 miles; AD = 17.3 miles; AE = 55.8
miles.
Distance (LY): 403
Total luminosity (Suns): 14.5
Holmes 24
Rating: 5 M
HD 184486; SAO 124804
Position: 1934+0824
A
B
Magnitude
9.29
10.80
Separation PA
—
—
14.9
309
Year
—
1924
Notes:
1 measurement.
The Tycho-2 Catalog indicates a single star entry.
- 47 -
Spectra
F8
Colors
W
bW
Zone 173
Observations:
C11 at 115x.
Alpha Aql
Rating: 5 M
Altair (Arabic name for the constellation); 53 Aql; SII 10; ADS 13009; HD 187642;
SAO 125122
Position: 1951+0851
A
B
C
Magnitude
0.77
10.21
10.00
Separation
—
165 +
247 +
PA
—
301 100 +
Year
—
1925
1959
Spectra
A5 IV
Colors
W
W
W?
Notes:
AB 1836: 152 @ 322. 13 measurements.
AC 1905: 238 @ 94. 2 measurements.
It is 1.5 times bigger than the Sun and has an angular diameter of 0.0028". It rotates
very rapidly, turning once every 9 hours! (Thus it is probably a flattened ellipsoid.) It is
also an infra-red source.
There are two optical companions nearby: 9.6m at 165" (pa 301, discovered by F. W.
Struve in 1836, when it was at 152 @ 322) and 10.1m at 247" (pa 100).
From James Kaler's Star Notes:
First magnitude Altair is also the southern anchor of the famed Summer Triangle,
which it makes with Vega and Deneb.
The Arabic name "Altair," reflective of the constellation itself, comes from a phrase
meaning "the flying eagle." Though three of the stars of the Summer Triangle are all
white in color and hotter than the Sun, all are also individuals. With a temperature of
about 7,800 degrees Kelvin, Altair is the coolest of the three (with Vega and Deneb
nearly equal at 9,500 Kelvin). Altair is also the least luminous. From its distance of 16.8
light years, we find it to be 11 times brighter than the Sun, as opposed to 50 times for
Vega and an astounding 200,000 or so for much more distant Deneb.
Like the Sun and Vega, Altair is "on the main sequence" of stars, fusing hydrogen into
helium in its core. Yet the star is not without its own striking characteristics. It is moving
across the sky against the background of distant stars more quickly than most, and will
displace itself by as much as a degree in only 5,000 years. It is also a very rapid rotator.
Its equatorial spin speed, while certainly not a record, is still an astonishing 242
kilometers per second, as compared with the Sun's 2 kilometers per second. With its
radius about 1.7 times that of the Sun, the star has a rotation period of only 9 hours, as
opposed to nearly a month for our ponderously spinning Sun.
- 48 -
Zone 173
Observations:
C11 at 65x.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 4.55 inches.
Separation: AB = 4.37 miles; AC = 6.55 miles.
Distance (LY): 17
Total luminosity (Suns): 10
Difficult
A 1184
Rating: 4 D
ADS 12537; HD 183832
Position: 1931+0824
A
B
Magnitude
8.26
8.85
Separation PA
—
—
0.9 111 +
Year
—
1998
Spectra
G0 IV
Colors
W
W
Notes:
1905: 1.4 @ 103. 28 measurements.
Observations:
C11 at 634x.
Distance (LY): 259
Total luminosity (Suns): 4.12
Beta Aql
Rating: 5 D
60 Aql; Alshain (Persian name for the constellation); OS 532; ADS 13110; HD 188512;
SAO 125235
Position: 1955+0624
A
B
C
Magnitude
3.71
11.60
11.60
Separation
—
12.9 +
203.6 +!
PA
—
8349 +
Notes:
AB 1852: 12.1 @ 16. 26 measurements.
AC 1879: 151.9 @ 347. 5 measurements.
- 49 -
Year
—
1976
1986
Spectra
G8 IV
dM3
Colors
yO!!
?
?
Zone 173
The primary is an infra-red source.
From James Kaler's Star Notes:
Alshain, a class G subgiant with a temperature of 5,300 Kelvin, and bears some
similarity to the Sun. Its radius is about thrice solar. Alshain is slightly variable (by about
5% of a magnitude), has a magnetic field slightly stronger than that of the Sun, and
displays some solar-like activity.
Its motions have been examined for the effects of planets, but none have been found.
Neither has any surrounding dust disk that might indicate a planetary system. Perhaps
that is just as well, as its subgiant status and that it is overly bright for its temperature
show that it has stopped fusing hydrogen in its core, and with a dead helium core is
preparing to become a much more luminous giant star. The Sun will reach such a stage in
about seven billion years. Alshain, with a mass 30% greater than the Sun's, has a
hydrogen-fusing lifetime only about 80% solar.
Alshain has a companion 13 seconds of arc away, although at 12th magnitude it is so
dim that it is hard to see. A class M red dwarf that is a bit warmer than Proxima Centauri,
Alshain-B has a temperature of only 3,400 Kelvin and a very low luminosity a mere 2.5%
that of the Sun (yet one still 10 times brighter than Proxima). If at the projected
separation of 175 Astronomical Units, Alshain-B would shine only about as brightly as
our quarter Moon as seen from Alshain proper (or from some undetected close-in planet).
While such red dwarfs are faint, they are numerous, making up 70% of the stars in the
Galaxy. With low masses (Alshain-B's only a third that of the Sun), red dwarfs are so
long- lived that none has ever yet had a chance to die.
Observations:
C8 at 206x. Rich field.
Scale model (in which the Sun is the size of a baseball):
Diameter: A = 11.1 inches; B = 58.9 inches.
Separation: AB = 4,752 feet; AC = 14.3 miles.
Distance (LY): 45
Total luminosity (Suns): 5.278
- 50 -
Zone 173
Deep Sky Objects
Moderate
NGC 6804
Other Names: PK 45-4.1; H VI 38
Astronomical League Program: Herschel II Club
Rating: 3 M
Position: 1932+0913
Type: Pn
Dimensions: 60"
Class: 4
Magnitude: 12.2
Notes:
Herschel mis-classified it as an open cluster when he discovered it in 1791.
Observations:
C8 at 206x. Medium powers work best, where you will see an oval patch. An 11m
star lies on the N edge.
C11 at 115x and O-III filter. I could barely see it without the filter, but the filter made
it look like a neon sign. Round and somewhat splotchy, I could detect no central star or
annuluis.
Model (where the Sun is a baseball):
Its diameter would be 393 miles.
Distance (LY): 4,200
Luminosity (suns): 18
Difficult
NGC 6807
Other Names: PK 42-6.1
Rating: 3 D
Position: 1935+0541
Type: Pn
Dimensions: 2''
Class: 2
Magnitude: 13.8
Notes:
The central star is 13.9m.
- 51 -
Zone 173
Edward Pickering found this nebula in 1882.
Observations:
C8 at 104x. It was very bright and stellar at 104x; at 200x it still looks stellar, but not
quite focusable.
- 52 -
Zone 173
Zone 173 Mini-Catalog
Double Stars
Designation
Position
Rating
Map
STF 2449
1906+0709
1E
2
28 Aql
1920+1222
1E
1
STF 2426
1900+1253
2E
1
STF 2510
1923+0930
2E
2
A. G. 386
1935+1156
2E
3
STF 2443
1904+1447
3E
1
STF 2446
1906+0633
3E
2
STF 2489
1916+1432
3E
1
STF 2497
1920+0535
3E
2
31 Aql
1925+1154
3E
1
A. G. 384
1931+1135
3E
3
STF 2543
1936+0600
3E
4
STF 2544
1937+0819
3E
4
STF 2562
1943+0823
3E
4
Howe 50
Jonckheere
1684
1943+0502
3E
4
1943+0627
3E
4
STF 2570
1945+1046
3E
3
A. G. 391
1948+1003
3E
3
STF 2432 rej
1902+1232
4E
1
STF 2436
1902+0845
4E
2
Component
A
B
A
B
C
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
C
A
B
A
B
A
B
C
A
B
C
A
B
A
B
A
B
A
B
A
B
C
A
B
C
D
CD
- 53 -
Mag
6.71
7.36
5.53
9.02
12.90
7.26
9.14
7.90
9.10
7.93
10.40
8.28
9.00
6.75
8.72
10.20
5.65
9.55
7.59
8.52
5.16
8.70
10.60
9.39
9.72
6.62
10.71
8.62
9.88
9.30
6.89
8.70
12.30
10.06
10.60
11.04
12.10
7.50
9.68
7.53
9.16
6.83
10.32
13.10
8.47
9.22
9.80
11.20
Separation
—
8.3 +
—
59.9 1,912.0
—
16.7 —
8.7 —
28.3 +
—
6.6 +
—
9.4 36.4 +
—
8.1 —
30.0 =
—
98.5 -!!
135.3 +!
—
22.7 —
11.9 —
1.0 14.1 —
27.0 81.7
—
2.6 +
—
6.3 +
—
4.2 +
—
51.7 +
—
15.7 +
20.3
—
30.7 135.1 +
PA
—
290 —
175 1,912.0
—
160 =
—
181 —
315 +
—
313 =
—
153 36.4 +
—
345 —
357 —
300 -!!
135.3 +!
—
160 —
151 —
188 14.1 —
71 -?
81.7
—
18 =
—
243 +
—
277 +
—
296 +
—
91 +
20.3
—
314 +
135.1 +
10.6
10
Zone 173
Designation
Position
Rating
Map
A. G. 371
1904+1106
4E
1
STF 2471
1911+0807
4E
2
OS 370
1917+0920
4E
2
h5509
1918+0847
4E
2
OSS 180
1921+1425
4E
1
STF 2506 rej
1922+1422
4E
1
STF 2518
1926+1436
4E
1
A. G. 379
1927+1359
4E
1
A. G. 382
1928+1204
4E
1
A 1185
1933+0831
4E
4
h893
1939+1012
4E
3
STF 2567
1944+1222
4E
3
Barton 1953
1945+1418
4E
3
h897
1947+0845
4E
4
Bur 828
1947+0610
4E
4
STF 2590
1952+1021
4E
3
STF 2593 rej
1953+1150
4E
3
A. G. 241
1953+0821
4E
4
STF 2428
1900+1454
5E
1
h2852
1903+0724
5E
2
Zeta Aql
1905+1352
5E
1
h876
1908+0859
5E
2
STF 2468
1910+0841
5E
2
h878
1912+0842
5E
2
A. G. 374
1912+1348
5E
1
A. G. 229
1922+0912
5E
2
Component
A
B
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
A
B
A
B
A
B
A
B
A
B
A
B
- 54 -
Mag
9.09
10.50
7.44
10.67
8.23
8.73
13.90
9.60
10.13
7.71
8.82
9.56
10.46
8.09
10.55
9.58
11.02
9.42
10.48
9.56
10.16
9.30
9.72
7.94
10.38
9.73
10.79
9.73
10.22
8.51
10.40
6.52
10.31
8.80
10.10
11.40
9.90
10.40
8.20
10.30
10.21
11.43
2.99
11.80
7.55
11.26
8.70
9.66
9.97
11.25
9.02
11.41
9.88
10.39
Separation
—
5.5 +
—
8.6 +
—
19.5 =
1,907.0
—
7.1 =
—
79.8 —
17.4 +
—
5.5 +
—
12.7 —
10.9 +
—
3.4 +
—
7.3 —
18.1 =
—
6.2 =
—
13.9 =
—
2.9 +
—
13.5 =
—
12.1 3.5 —
10.8 =
—
6.7 +
—
22.5 —
160.8 +
—
30.2 =
—
7.6 =
—
22.0 +
—
15.4
—
33.2 +
PA
—
160 +
—
122 =
—
14 1,907.0
—
104 =
—
266 =
—
350 —
352 —
92 —
190 =
—
193 =
—
189 —
311 —
195 +
—
290 +
—
10 +
—
309 —
239 +
3.5 —
197 +
—
287 +
—
131 —
77 =
—
5=
—
258 =
—
340 +
—
229
—
163 -
Zone 173
Designation
Position
Rating
Map
Sola 1
1926+0907
5E
2
Cogshall 2
1928+1243
5E
1
A. G. 383
1929+1228
5E
1
Hough 452
1931+1310
5E
3
STF 2558 rej
1941+1041
5E
3
A. G. 389
1942+1315
5E
3
Jonckheere
1183
1942+0920
5E
4
Chi Aql
1943+1149
5E
3
Gamma Aql
1946+1037
5E
3
Baillaud 2956
1957+0514
5E
4
A. G. 392
1949+1428
3M
3
Bur 266
1958+1125
3M
3
Bur 466
1905+1050
4M
1
STF 2520
1927+1252
4M
1
h889
1930+0917
4M
2
Barton 1321
1938+1422
4M
3
h1359
1901+1136
5M
1
h2854
Jonckheere
2170
1907+0847
5M
2
1917+1151
5M
1
Hough 576
1921+0639
5M
2
h884
1921+0949
5M
2
Component
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
C
A
B
C
D
E
A
B
A
B
A
B
A
B
A
B
A
B
C
A
B
A
B
A
B
A
B
C
CD
A
B
A
B
C
A
B
C
BC
- 55 -
Mag
9.40
9.80
9.52
10.57
7.94
11.06
8.53
11.69
11.78
8.10
11.60
8.35
11.60
10.60
13.50
11.42
5.73
6.76
12.30
11.50
10.30
2.72
12.77
10.36
11.20
9.58
9.74
7.53
11.50
9.02
9.58
9.70
10.32
10.02
8.36
11.03
10.33
10.74
9.02
13.50
9.38
11.70
13.20
8.19
11.84
8.22
11.50
11.58
7.77
11.13
13.33
Separation
—
22.8 —
24.4 +
—
19.9 +
—
11.1 +
22.8 +
—
28.3 —
23.2 +
—
2.5 17.2 =
—
0.4 81.7
5.0 140.0
—
132.7 +
—
9.7 =
—
3.5 —
15.8 +
—
2.0 +
—
2.2 +
88.7 +
—
25.5 —
4.5 —
16.7
—
9.6 +
PA
—
324 —
242 —
304 =
—
239 22.8 +
—
308 +
—
214 +
—
329 +
17.2 =
—
77 81.7
5.0 275
—
258 =
—
246 —
154 +
—
167 =
—
165 +
—
236 +
88.7 +
—
100 =
—
158 +
—
197
—
43 -
11.7
—
53.9 —
3.7 43.2 —
44.4 -
211
—
32 +
—
179 43.2 —
299 =
10.5
238
Zone 173
Designation
Position
Rating
Map
Bur 650
1932+0630
5M
4
Holmes 24
1934+0824
5M
4
Alpha Aql
1951+0851
5M
4
A 1184
1931+0824
4D
4
Pi Aql
Jonckheere
1279
1949+1149
4D
3
1901+1253
5D
1
STF 2435
1902+0846
5D
2
Ball 36
1906+0814
5D
2
Beta Aql
1955+0624
5D
4
Component
A
B
C
D
E
A
B
A
B
C
A
B
A
B
C
A
B
A
B
C
D
A
B
C
A
B
C
Mag
8.15
11.10
9.70
12.12
10.09
9.29
10.80
0.77
10.21
10.00
8.26
8.85
5.75
6.79
12.45
10.46
10.50
10.59
11.54
12.30
12.80
8.23
11.45
10.81
3.71
11.60
11.60
Separation
—
5.9 10.9 27.5 +
88.8 +
—
14.9
—
165 +
247 +
—
0.9 —
1.4 33.6 +
—
2.9 +
—
1.5 +
10.9 +
8.9 —
77 +
181 +
—
12.9 +
203.6 +!
PA
—
146 +
10.9 27.5 +
274 =
—
309
—
301 247 +
—
111 +
—
105 33.6 +
—
348 +?
—
349 10.9 +
8.9 —
229 181 +
—
8203.6 +!
Deep Space
Object
NGC 6781
NGC 6804
Barnard 143
NGC 6738
PK 51- 3.1
NGC 6837
NGC 6807
PK 45- 2.1
NGC 6803
NGC 6840
NGC 6843
Position
1918+0633
1932+0913
1941+1057
1901+1136
1941+1457
1954+1141
1935+0541
1924+0954
1931+1003
1954+1202
1956+1209
Rating
3M
3M
3M
5M
5M
5M
3D
4D
5D
5D
5D
Map
2
4
3
1
3
3
4
2
3
3
3
Type
Pn (3b)
Pn (4)
Dn
Oc (IV 2p)
Pn (2)
Oc (IV 1p:b)
Pn (2)
Pn (1)
Pn (2a)
Oc
Oc
- 56 -
Specifications
Surface
Mag
Br
11.8
12.2
8.5
13.7
13.0
13.8
12.7
11.4
11.0
12.0
Population
25
20