20316+4113 ES 1679

 
 
20h 31m 37.49s +41 13' 20.9" P.A. 214 sep 4 mag 10.57,13.20 Sp O6V+O9III
 
 
Coord 2000
20316+4113
Discov num
ES 1679
Comp
Coord arcsec 2000
20 31 37.49 +41 13 20.9
Date first
1917
Date last
2015
Obs
6
Pa first
217
Pa last
214
P.A. Now (θ)
214°
Sep first
4.5
Sep last
4.0
Sep. Now (ρ)
4"
Mag pri
10.57
Mag sec
13.20
delta mag (ΔM)
2.63
Spectral class
O6V+O9III (blue/blue)
Pri motion ra
-008
Sec motion ra
Pri motion dec
-018
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
214.4
Precise sep
3.977
Constellation
Cygnus
SAO
49745
Tycho2
3157-00299-1
Gaia DR2
62091598976
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20316+4113 ES 1679 2005 2 214 3.5 10.57 13.20 O9: 203137.49+411320.9
20316+4113 ES 1679 2006 5 214 4.0 10.57 13.20 O6V+O9III 203137.49+411320.9
20316+4113 ES 1679 2015 6 214 4.0 10.57 13.20 O6V+O9III 203137.49+411320.9

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