21203+4921 BU 839 CB
21h 20m 17.46s +49° 20' 35.7" P.A. 7.00 sep 8.1 mag 9.01,10.08
| Coord 2000 |
21203+4921 |
|
Discov num |
BU 839 |
|
Comp |
CB |
|
Coord arcsec 2000 |
21 20 17.46 +49 20 35.7 |
|
| Date first |
1881 |
|
Date last |
2016 |
|
Obs |
9 |
|
| Pa first |
6 |
|
Pa last |
7.2 |
|
P.A. Now (θ) |
7.2° |
|
| Sep first |
6.5 |
|
Sep last |
8.129 |
|
Sep. Now (ρ) |
8.129" |
|
| Mag pri |
9.01 |
|
Mag sec |
10.08 |
|
delta mag (ΔM) |
1.07 |
|
Spectral class |
|
|
| Pri motion ra |
|
|
Sec motion ra |
-006 |
|
| Pri motion dec |
|
|
Sec motion dec |
-006 |
|
| Notes |
|
|
Nature of this double is uncertain.
21203+4921 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
HD 203416 |
50731 |
21 20 19 +49 21 08 |
BU 839 AB |
2016 |
15 |
207 |
14.5 |
8.55 |
10.08 |
1.53 |
|
|
| Show |
|
50731 |
21 20 19 +49 21 08 |
BU 839 AC |
2016 |
21 |
200 |
22.5 |
8.55 |
9.01 |
0.46 |
|
|
| Show |
|
|
21 20 17 +49 20 36 |
BU 839 CB |
2016 |
9 |
7 |
8.1 |
9.01 |
10.08 |
1.07 |
|
<=== |
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Gaia DR2 |
2165085218562684416 |
|
