20553+4218 OSO 137 AF
20h 55m 16.75s +42° 18' 00.6" P.A. 137.00 sep 16.8 mag 10.27,17.90 Sp G5
| Coord 2000 |
20553+4218 |
|
Discov num |
OSO 137 |
|
Comp |
AF |
|
Coord arcsec 2000 |
20 55 16.75 +42 18 00.6 |
|
| Date first |
1995 |
|
Date last |
2000 |
|
Obs |
2 |
|
| Pa first |
141 |
|
Pa last |
136.5 |
|
P.A. Now (θ) |
136.5° |
|
| Sep first |
18.5 |
|
Sep last |
16.8 |
|
Sep. Now (ρ) |
16.8" |
|
| Mag pri |
10.27 |
|
Mag sec |
17.90 |
|
delta mag (ΔM) |
7.63 |
|
Spectral class |
G5 (yellow) |
|
| Pri motion ra |
+057 |
|
Sec motion ra |
|
|
| Pri motion dec |
-390 |
|
Sec motion dec |
|
|
| Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
20553+4218 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
20 55 17 +42 18 01 |
OSO 137 AB |
2000 |
2 |
116 |
10.8 |
10.27 |
18.50 |
8.23 |
|
|
| Show |
|
|
20 55 17 +42 18 01 |
OSO 137 AC |
2000 |
2 |
225 |
11.6 |
10.27 |
18.40 |
8.13 |
|
|
| Show |
|
|
20 55 17 +42 18 01 |
OSO 137 AD |
2000 |
2 |
276 |
14.3 |
10.27 |
18.70 |
8.43 |
|
|
| Show |
|
|
20 55 17 +42 18 01 |
OSO 137 AE |
2000 |
2 |
295 |
14.9 |
10.27 |
18.90 |
8.63 |
|
|
| Show |
|
|
20 55 17 +42 18 01 |
OSO 137 AF |
2000 |
2 |
137 |
16.8 |
10.27 |
17.90 |
7.63 |
|
<=== |
| Show |
|
|
20 55 17 +42 18 01 |
OSO 137 AG |
2000 |
2 |
346 |
25.0 |
10.27 |
17.50 |
7.23 |
|
|
Septuple system
7 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Tycho2 |
3175-00128-1 |
|
