20170+3725 CIA 9 Aa1,2
20h 17m 00.03s +37° 25' 23.8" P.A. 305.00 sep 0.0 mag 7.20,8.00 Sp WN5+O9V dist. 172.12 pc (561.46 l.y.)
| Coord 2000 |
20170+3725 |
|
Discov num |
CIA 9 |
|
Comp |
Aa1,2 |
|
Coord arcsec 2000 |
20 17 00.03 +37 25 23.8 |
|
| Date first |
2013 |
|
Date last |
2013 |
|
Obs |
1 |
|
| Pa first |
305 |
|
Pa last |
305.3 |
|
P.A. Now (θ) |
305.3° |
|
| Sep first |
0.0 |
|
Sep last |
0.012 |
|
Sep. Now (ρ) |
0.012" |
|
| Mag pri |
7.20 |
|
Mag sec |
8.00 |
|
delta mag (ΔM) |
0.8 |
|
Spectral class |
WN5+O9V (Wolf-Rayet/blue) |
|
| Pri motion ra |
-007 |
|
Sec motion ra |
|
|
| Pri motion dec |
-005 |
|
Sec motion dec |
|
|
| Notes |
N
K
(See Notes, K-band or other infrared magnitudes) |
|
Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes
Nature of this double is uncertain.
20170+3725 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
69755 |
20 17 00 +37 25 24 |
CIA 9 Aa1,2 |
2013 |
1 |
305 |
0.0 |
7.20 |
8.00 |
0.80 |
|
<=== |
| Show |
|
69755 |
20 17 00 +37 25 24 |
HDS 2891 Aa,Ab |
2016 |
4 |
55 |
0.9 |
8.11 |
11.25 |
3.14 |
|
|
| Show |
HD 193077 |
69755 |
20 17 00 +37 25 24 |
A 1423 AB |
2016 |
9 |
128 |
4.4 |
8.11 |
12.10 |
3.99 |
|
|
Quadruple system
2 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Cygnus |
|
SAO |
69755 |
|
HIP |
99982 |
|
Tycho2 |
2684-00857-1 |
|
| Gaia DR2 |
2060661846184974464 |
|
HD |
193077 |
|
BD |
BD+36 3987 |
|
Distance |
172.12 |
|
| Distance ly |
561.46 |
|
