21591+6400 HU 975 AB,C (HD 209178)
21h 59m 03.72s +63° 59' 55.3" P.A. 135.00 sep 1.9 mag 8.90,11.02 Sp B8V dist. 110.13 pc (359.24 l.y.)
| Coord 2000 |
21591+6400 |
|
Discov num |
HU 975 |
|
Comp |
AB,C |
|
Coord arcsec 2000 |
21 59 03.72 +63 59 55.3 |
|
| Date first |
1904 |
|
Date last |
2008 |
|
Obs |
8 |
|
| Pa first |
135 |
|
Pa last |
134.7 |
|
P.A. Now (θ) |
134.7° |
|
| Sep first |
1.9 |
|
Sep last |
1.866 |
|
Sep. Now (ρ) |
1.866" |
|
| Mag pri |
8.90 |
|
Mag sec |
11.02 |
|
delta mag (ΔM) |
2.12 |
|
Spectral class |
B8V (blue-white) |
|
| Pri motion ra |
-004 |
|
Sec motion ra |
-004 |
|
| Pri motion dec |
-008 |
|
Sec motion dec |
-008 |
|
| Notes |
|
|
Nature of this double is uncertain.
21591+6400 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
19777 |
21 59 04 +63 59 55 |
HU 975 AB |
2008 |
12 |
210 |
0.3 |
9.39 |
10.04 |
0.65 |
|
|
| Show |
HD 209178 |
19777 |
21 59 04 +63 59 55 |
HU 975 AB,C |
2008 |
8 |
135 |
1.9 |
8.90 |
11.02 |
2.12 |
|
<=== |
| Show |
|
19777 |
21 59 04 +63 59 55 |
STI 1077 AB,D |
2012 |
8 |
145 |
8.3 |
8.90 |
12.67 |
3.77 |
|
|
Quadruple system
5 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 209178 |
|
Constellation |
Cepheus |
|
SAO |
19777 |
|
HIP |
108519 |
|
| Tycho2 |
4270-03604-1 |
|
Gaia DR2 |
2218096591140624896 |
|
HD |
209178 |
|
BD |
BD+63 1794 |
|
| Distance |
110.13 |
|
Distance ly |
359.24 |
|
