21407+3056 GRV 490
21h 40m 42.88s +30° 56' 44.9" P.A. 328.00 sep 31.7 mag 11.34,12.07
| Coord 2000 |
21407+3056 |
|
Discov num |
GRV 490 |
|
Comp |
|
|
Coord arcsec 2000 |
21 40 42.88 +30 56 44.9 |
|
| Date first |
1895 |
|
Date last |
2015 |
|
Obs |
12 |
|
| Pa first |
329 |
|
Pa last |
328.1 |
|
P.A. Now (θ) |
328.1° |
|
| Sep first |
32.6 |
|
Sep last |
31.7 |
|
Sep. Now (ρ) |
31.7" |
|
| Mag pri |
11.34 |
|
Mag sec |
12.07 |
|
delta mag (ΔM) |
0.73 |
|
Spectral class |
|
|
| Pri motion ra |
-015 |
|
Sec motion ra |
-016 |
|
| Pri motion dec |
-022 |
|
Sec motion dec |
-027 |
|
| Notes |
S
(Parallax indidates non-physical) |
|
rPM=0.162 (< 0.3, Physical double)
This double is not physical.
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Tycho2 |
2717-01252-1 |
|
Gaia DR2 |
1849782220424037376 |
|
