20189+3817 A  1425AB

 
 
20h 18m 51.71s +38 16' 46.5" P.A. 258 sep 0.1 mag 7.95,8.25 Sp O9II-III dist. 1086.96 pc (3545.66 l.y.)
 
 
Coord 2000
20189+3817
Discov num
A  1425
Comp
AB
Coord arcsec 2000
20 18 51.71 +38 16 46.5
Date first
1906
Date last
2008
Obs
26
Pa first
297
Pa last
258
P.A. Now (θ)
258°
Sep first
0.2
Sep last
0.1
Sep. Now (ρ)
0.1"
Mag pri
7.95
Mag sec
8.25
delta mag (ΔM)
0.3
Spectral class
O9II-III (blue)
Pri motion ra
-010
Sec motion ra
Pri motion dec
-013
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
20189+3817 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20189+3817 A 1425 AB 1906 2008 26 258 0.1 7.95 8.25 0.30 <===
Show 20189+3817 A 1425 AB,C 1906 2000 3 310 9.1 6.65 13.20 6.55
Triple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
258.4
Precise sep
0.138
Constellation
Cygnus
SAO
69815
HIP
100146
Tycho2
3151-03449-1
Gaia DR2
69282480512
HD
193443
BD
BD+37 3879
Distance
1086.96
Distance ly
3545.66
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20189+3817 A 1425 AB 2005 25 259 0.1 8.25 7.95 O9II-III N 201851.71+381646.5
20189+3817 A 1425 AB 2008 27 258 0.1 7.95 8.25 O9II-III N 201851.71+381646.5

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