21474+4256 A 405
21h 47m 21.71s +42° 55' 58.1" P.A. 277.00 sep 1.9 mag 9.91,11.61 Sp A2
| Coord 2000 |
21474+4256 |
|
Discov num |
A 405 |
|
Comp |
|
|
Coord arcsec 2000 |
21 47 21.71 +42 55 58.1 |
|
| Date first |
1902 |
|
Date last |
2016 |
|
Obs |
8 |
|
| Pa first |
275 |
|
Pa last |
277.2 |
|
P.A. Now (θ) |
277.2° |
|
| Sep first |
1.7 |
|
Sep last |
1.9 |
|
Sep. Now (ρ) |
1.9" |
|
| Mag pri |
9.91 |
|
Mag sec |
11.61 |
|
delta mag (ΔM) |
1.7 |
|
Spectral class |
A2 (white) |
|
| Pri motion ra |
-006 |
|
Sec motion ra |
-006 |
|
| Pri motion dec |
-008 |
|
Sec motion dec |
-008 |
|
| Notes |
|
|
Nature of this double is uncertain.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Tycho2 |
3192-00815-1 |
|
Gaia DR2 |
1972646524496410880 |
|
