20170+3725 HDS 2891 Aa,Ab

 
 
20h 17m 00.03s +37° 25' 23.8" P.A. 55.00 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 2016 Obs 4
Pa first 50 Pa last 54.6 P.A. Now (θ) 54.6°
Sep first 0.9 Sep last 0.881 Sep. Now (ρ) 0.881"
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 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