21025+3146 ES 374 BC
21h 02m 47.86s +31° 45' 04.6" P.A. 203.00 sep 4.5 mag 11.31,14.00
| Coord 2000 |
21025+3146 |
|
Discov num |
ES 374 |
|
Comp |
BC |
|
Coord arcsec 2000 |
21 02 47.86 +31 45 04.6 |
|
| Date first |
1906 |
|
Date last |
2015 |
|
Obs |
3 |
|
| Pa first |
230 |
|
Pa last |
202.9 |
|
P.A. Now (θ) |
202.9° |
|
| Sep first |
4.5 |
|
Sep last |
4.464 |
|
Sep. Now (ρ) |
4.464" |
|
| Mag pri |
11.31 |
|
Mag sec |
14.00 |
|
delta mag (ΔM) |
2.69 |
|
Spectral class |
|
|
| Pri motion ra |
-007 |
|
Sec motion ra |
|
|
| Pri motion dec |
-003 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
21025+3146 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
21 02 46 +31 45 24 |
ES 374 AB |
2015 |
10 |
137 |
26.8 |
8.74 |
11.31 |
2.57 |
|
|
| Show |
|
|
21 02 48 +31 45 05 |
ES 374 BC |
2015 |
3 |
203 |
4.5 |
11.31 |
14.00 |
2.69 |
|
<=== |
| Show |
|
|
21 02 48 +31 45 05 |
CRB 15 BD |
2015 |
2 |
241 |
5.6 |
11.30 |
14.00 |
2.70 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Gaia DR2 |
1864762928924226048 |
|
