21291+4455 BU 448 (HD 204710)
21h 29m 06.33s +44° 55' 23.0" P.A. -1.00 sep 2.0 mag 6.95,11.00 Sp B8Ib dist. 478.47 pc (1560.77 l.y.)
| Coord 2000 |
21291+4455 |
|
Discov num |
BU 448 |
|
Comp |
|
|
Coord arcsec 2000 |
21 29 06.33 +44 55 23.0 |
|
| Date first |
1876 |
|
Date last |
1876 |
|
Obs |
0 |
|
| Pa first |
-1 |
|
Pa last |
-1 |
|
P.A. Now (θ) |
-1 |
|
| Sep first |
2.0 |
|
Sep last |
2 |
|
Sep. Now (ρ) |
2" |
|
| Mag pri |
6.95 |
|
Mag sec |
11.00 |
|
delta mag (ΔM) |
4.05 |
|
Spectral class |
B8Ib (blue-white) |
|
| Pri motion ra |
-001 |
|
Sec motion ra |
|
|
| Pri motion dec |
-003 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 204710 |
|
Constellation |
Cygnus |
|
SAO |
50925 |
|
HIP |
106071 |
|
| Tycho2 |
3194-01811-1 |
|
Gaia DR2 |
1971215170825436416 |
|
HD |
204710 |
|
GC |
30097 |
|
| BD |
BD+44 3832 |
|
Distance |
478.47 |
|
Distance ly |
1560.77 |
|