21166+3018 J 3131 BC
21h 16m 17.11s +30° 20' 20.2" P.A. 229.00 sep 5.5 mag 13.40,14.90
| Coord 2000 |
21166+3018 |
|
Discov num |
J 3131 |
|
Comp |
BC |
|
Coord arcsec 2000 |
21 16 17.11 +30 20 20.2 |
|
| Date first |
1944 |
|
Date last |
2015 |
|
Obs |
7 |
|
| Pa first |
230 |
|
Pa last |
229.1 |
|
P.A. Now (θ) |
229.1° |
|
| Sep first |
3.0 |
|
Sep last |
5.479 |
|
Sep. Now (ρ) |
5.479" |
|
| Mag pri |
13.40 |
|
Mag sec |
14.90 |
|
delta mag (ΔM) |
1.5 |
|
Spectral class |
|
|
| Pri motion ra |
+012 |
|
Sec motion ra |
|
|
| Pri motion dec |
+003 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
21166+3018 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
21 16 19 +30 20 28 |
J 3131 AB |
2015 |
7 |
253 |
24.6 |
11.80 |
13.40 |
1.60 |
|
|
| Show |
|
|
21 16 17 +30 20 20 |
J 3131 BC |
2015 |
7 |
229 |
5.5 |
13.40 |
14.90 |
1.50 |
|
<=== |
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Gaia DR2 |
1851985813525855232 |
|
