20170+3725 CIA   9Aa1,2

 
 
20H 17M 00.03S +37 25' 23.8" P.A. 305 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
P.A. Now (θ)
305°
Sep first
0.0
Sep last
0.0
Sep. Now (ρ)
0"
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)
Nature of this double is uncertain.
 
 
20170+3725 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 69755 20170+3725 CIA 9 Aa1,2 2013 2013 1 305 0.0 7.20 8.00 0.80 <===
Show 69755 20170+3725 HDS2891 Aa,Ab 1991 1991 2 50 0.9 8.11 11.25 3.14
Show 69755 20170+3725 A 1423 AB 1906 2000 6 128 4.5 8.11 12.10 3.99
Quadruple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Cygnus
SAO
69755
HIP
99982
Tycho2
2684-00857-1
HD
193077
BD
BD+36 3987
Distance
172.12
Distance ly
561.46
last precise pa
305.3
last precise sep
0.012