21558+3716 HO 174 AB
21h 55m 48.33s +37° 15' 54.1" P.A. 335.00 sep 7.6 mag 10.38,10.75 Sp A9+A9
| Coord 2000 |
21558+3716 |
|
Discov num |
HO 174 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 55 48.33 +37 15 54.1 |
|
| Date first |
1881 |
|
Date last |
2016 |
|
Obs |
25 |
|
| Pa first |
335 |
|
Pa last |
334.7 |
|
P.A. Now (θ) |
334.7° |
|
| Sep first |
7.3 |
|
Sep last |
7.605 |
|
Sep. Now (ρ) |
7.605" |
|
| Mag pri |
10.38 |
|
Mag sec |
10.75 |
|
delta mag (ΔM) |
0.37 |
|
Spectral class |
A9+A9 (white/white) |
|
| Pri motion ra |
-011 |
|
Sec motion ra |
-011 |
|
| Pri motion dec |
-016 |
|
Sec motion dec |
-016 |
|
| Notes |
N
T
(See Notes, Parallax indicates physical) |
|
This double is physical.
21558+3716 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
|
21 55 48 +37 15 54 |
HO 174 AB |
2016 |
25 |
335 |
7.6 |
10.38 |
10.75 |
0.37 |
|
<=== |
| Show |
|
|
21 55 48 +37 15 54 |
HO 174 AC |
2015 |
18 |
226 |
160.4 |
10.38 |
11.50 |
1.12 |
|
|
| Show |
|
|
21 55 48 +37 16 01 |
HO 174 BC |
2015 |
9 |
224 |
163.0 |
10.75 |
11.50 |
0.75 |
|
|
| Show |
|
|
21 55 39 +37 14 04 |
HO 174 CD |
2015 |
20 |
262 |
6.0 |
11.50 |
11.90 |
0.40 |
|
|
Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
Tycho2 |
2731-00181-1 |
|
Gaia DR2 |
1949828535784410368 |
|
