20316+4113 ES 1679AB

 
 
20h 31m 37.49s +41 13' 20.9" P.A. 214.00 sep 4.0 mag 10.57,13.20 Sp O6IV+B0IV
 
 
Coord 2000
20316+4113
Discov num
ES 1679
Comp
AB
Coord arcsec 2000
20 31 37.49 +41 13 20.9
Date first
1917
Date last
2015
Obs
9
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
O6IV+B0IV (blue/blue-white)
Pri motion ra
-008
Sec motion ra
Pri motion dec
-018
Sec motion dec
Notes
V (Proper motion indicates physical)
Visually invisible, K-band or other infrared star This double is physical.
 
 
20316+4113 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 49745 20316+4113 ES 1679 AB 1917 2015 9 214 4.0 10.57 13.20 2.63 <===
Show 49745 20316+4113 CAN 75 AC 2005 2005 2 166 8.2 5.70 12.70 7.00
Show 49745 20316+4113 CAN 75 AD 1998 2015 7 269 11.8 5.70 12.40 6.70
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
214.4
Precise sep
3.977
Constellation
Cygnus
SAO
49745
Tycho2
3157-00299-1
 
 
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 AB 2015 9 214 4.0 10.57 13.20 O6IV+B0IV V 203137.49+411320.9

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