20231+4047 J   787AB

 
 
20h 23m 07.30s +40 46' 55.2" P.A. 165 sep 2.6 mag 10.50,11.40 Sp B3
 
 
Coord 2000
20231+4047
Discov num
J   787
Comp
AB
Coord arcsec 2000
20 23 07.30 +40 46 55.2
Date first
1912
Date last
2003
Obs
4
Pa first
159
Pa last
165
P.A. Now (θ)
165°
Sep first
1.8
Sep last
2.6
Sep. Now (ρ)
2.6"
Mag pri
10.50
Mag sec
11.40
delta mag (ΔM)
0.9
Spectral class
B3 (blue-white)
Pri motion ra
-007
Sec motion ra
Pri motion dec
-000
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
20231+4047 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20231+4047 J 787 AB 1912 2003 4 165 2.6 10.50 11.40 0.90 <===
Show 20231+4047 J 787 AC 1917 2015 5 112 9.5 10.50 13.00 2.50
Show 20231+4047 J 787 AD 1917 2015 5 293 15.8 10.50 12.40 1.90
Show 20231+4047 J 787 CD 1917 2015 5 292 25.3 13.00 12.40 0.60
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
164.6
Precise sep
2.57
Constellation
Cygnus
SAO
49556
Tycho2
3156-01857-1
Gaia DR2
59999953024
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20231+4047 J 787 AB 2003 4 165 2.6 9.40 12.00 N 202307.30+404655.2

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