21156+3715 HO 285 AB
21h 15m 34.01s +37° 15' 08.5" P.A. 22.00 sep 9.2 mag 7.75,12.90 Sp B4V dist. 20000 pc (65240 l.y.)
| Coord 2000 |
21156+3715 |
|
Discov num |
HO 285 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 15 34.01 +37 15 08.5 |
|
| Date first |
1888 |
|
Date last |
2015 |
|
Obs |
9 |
|
| Pa first |
25 |
|
Pa last |
22.2 |
|
P.A. Now (θ) |
22.2° |
|
| Sep first |
8.6 |
|
Sep last |
9.187 |
|
Sep. Now (ρ) |
9.187" |
|
| Mag pri |
7.75 |
|
Mag sec |
12.90 |
|
delta mag (ΔM) |
5.15 |
|
Spectral class |
B4V (blue-white) |
|
| Pri motion ra |
+001 |
|
Sec motion ra |
|
|
| Pri motion dec |
-004 |
|
Sec motion dec |
|
|
| Notes |
|
|
Nature of this double is uncertain.
21156+3715 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
71128 |
21 15 34 +37 15 08 |
HO 285 AB |
2015 |
9 |
22 |
9.2 |
7.75 |
12.90 |
5.15 |
|
<=== |
| Show |
HD 202569 |
71128 |
21 15 34 +37 15 08 |
WAL 138 AC |
2015 |
8 |
29 |
57.3 |
7.75 |
12.44 |
4.69 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
SAO |
71128 |
|
HIP |
104952 |
|
Tycho2 |
2714-02251-1 |
|
| Gaia DR2 |
1868634030180516608 |
|
HD |
202569 |
|
BD |
BD+36 4492 |
|
Distance |
20000 |
|
| Distance ly |
65240 |
|
