19306+2817 BU  651AB

 
 
19h 30m 33.77s +28 16' 51.3" P.A. 287 sep 6.5 mag 8.89,12.90 Sp F2
 
 
Coord 2000
19306+2817
Discov num
BU  651
Comp
AB
Coord arcsec 2000
19 30 33.77 +28 16 51.3
Date first
1878
Date last
2015
Obs
20
Pa first
290
Pa last
287
P.A. Now (θ)
287°
Sep first
6.4
Sep last
6.5
Sep. Now (ρ)
6.5"
Mag pri
8.89
Mag sec
12.90
delta mag (ΔM)
4.01
Spectral class
F2 (yellow-white)
Pri motion ra
+006
Sec motion ra
-004
Pri motion dec
+000
Sec motion dec
+002
Notes
rPM=1.7
This double is not physical.
 
 
19306+2817 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 19306+2817 COU1161 Aa,Ab 1973 1992 9 6 0.2 8.10 8.90 0.80
Show 19306+2817 COU1161 Aa,Ac 1992 2007 2 340 0.1 8.10 8.80 0.70
Show 19306+2817 BU 651 AB 1878 2015 20 287 6.5 8.89 12.90 4.01 <===
Quadruple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
287.1
Precise sep
6.493
Constellation
Cygnus
SAO
87297
Tycho2
2137-01457-1
Gaia DR2
86797361536
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19306+2817 BU 651 AB 1999 16 288 6.3 8.89 12.90 D 193033.77+281651.3
19306+2817 BU 651 AB 2007 17 287 6.5 8.89 12.90 D 193033.77+281651.3
19306+2817 BU 651 AB 2013 19 287 6.5 8.90 12.90 F2 193033.77+281651.3
19306+2817 BU 651 AB 2015 20 287 6.5 8.89 12.90 F2 193033.77+281651.3

If you need more information about this double, apply for a data request form to the WDS.