21058+3929 A 2691 AB
21h 05m 44.84s +39° 29' 29.4" P.A. 217.00 sep 2.7 mag 9.71,13.60 Sp B9IV
| Coord 2000 |
21058+3929 |
|
Discov num |
A 2691 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 05 44.84 +39 29 29.4 |
|
| Date first |
1913 |
|
Date last |
2016 |
|
Obs |
7 |
|
| Pa first |
219 |
|
Pa last |
217.1 |
|
P.A. Now (θ) |
217.1° |
|
| Sep first |
2.5 |
|
Sep last |
2.72 |
|
Sep. Now (ρ) |
2.72" |
|
| Mag pri |
9.71 |
|
Mag sec |
13.60 |
|
delta mag (ΔM) |
3.89 |
|
Spectral class |
B9IV (blue-white) |
|
| Pri motion ra |
+000 |
|
Sec motion ra |
|
|
| Pri motion dec |
-006 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
21058+3929 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
21 05 45 +39 29 29 |
A 2691 AB |
2016 |
7 |
217 |
2.7 |
9.71 |
13.60 |
3.89 |
|
<=== |
| Show |
|
|
21 05 45 +39 29 29 |
A 2691 AC |
2016 |
11 |
313 |
27.4 |
9.71 |
11.81 |
2.10 |
|
|
| Show |
|
|
21 05 43 +39 29 48 |
A 2691 CD |
2016 |
11 |
275 |
6.4 |
11.81 |
14.30 |
2.49 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Tycho2 |
3172-00090-1 |
|
Gaia DR2 |
1872336532505968384 |
|
