20170+3725 HDS2891Aa,Ab

 
 
20h 17m 00.03s +37 25' 23.8" P.A. 50 sep 0.9 mag 8.11,11.25 Sp WNs... dist. 172.12 pc (561.46 l.y.)
 
 
Coord 2000
20170+3725
Discov num
HDS2891
Comp
Aa,Ab
Coord arcsec 2000
20 17 00.03 +37 25 23.8
Date first
1991
Date last
1991
Obs
2
Pa first
50
Pa last
50
P.A. Now (θ)
50°
Sep first
0.9
Sep last
0.9
Sep. Now (ρ)
0.9"
Mag pri
8.11
Mag sec
11.25
delta mag (ΔM)
3.14
Spectral class
WNs... (Wolf-Rayet)
Pri motion ra
-007
Sec motion ra
-002
Pri motion dec
-005
Sec motion dec
-007
Notes
N (See Notes)
rPM=0.626
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 20170+3725 CIA 9 Aa1,2 2013 2013 1 305 0.0 7.20 8.00 0.80
Show 20170+3725 HDS2891 Aa,Ab 1991 1991 2 50 0.9 8.11 11.25 3.14 <===
Show 20170+3725 A 1423 AB 1906 2016 8 128 4.4 8.11 12.10 3.99
Quadruple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
50.4
Precise sep
0.86
Constellation
Cygnus
SAO
69755
HIP
99982
Tycho2
2684-00857-1
Gaia DR2
46184974464
HD
193077
BD
BD+36 3987
Distance
172.12
Distance ly
561.46
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20170+3725 HDS2891 Aa,Ab 1991 2 50 0.9 8.11 11.25 WNs... D 201700.03+372523.8

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