20521+3439 RAO 521 (Y Cyg)
20h 52m 03.58s +34° 39' 27.5" P.A. -1.00 sep 0.2 mag 7.30, Sp O9.5IV dist. 1250 pc (4077.5 l.y.)
| Coord 2000 |
20521+3439 |
|
Discov num |
RAO 521 |
|
Comp |
|
|
Coord arcsec 2000 |
20 52 03.58 +34 39 27.5 |
|
| Date first |
2018 |
|
Date last |
2018 |
|
Obs |
0 |
|
| Pa first |
-1 |
|
Pa last |
-1 |
|
P.A. Now (θ) |
-1 |
|
| Sep first |
0.2 |
|
Sep last |
0.16 |
|
Sep. Now (ρ) |
0.16" |
|
| Mag pri |
7.30 |
|
Mag sec |
|
|
delta mag (ΔM) |
|
|
Spectral class |
O9.5IV (blue) |
|
| Pri motion ra |
+003 |
|
Sec motion ra |
|
|
| Pri motion dec |
-016 |
|
Sec motion dec |
|
|
| Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Var name |
Y Cyg |
|
Constellation |
Cygnus |
|
SAO |
70599 |
|
HIP |
102999 |
|
| Tycho2 |
2696-03486-1 |
|
HD |
198846 |
|
GC |
29114 |
|
BD |
BD+34 4184 |
|
| Distance |
1250 |
|
Distance ly |
4077.5 |
|
