21203+4921 BU  839CB

 
 
21h 20m 17.46s +49 20' 35.7" P.A. 8 sep 8.1 mag 9.01,10.08
 
 
Coord 2000
21203+4921
Discov num
BU  839
Comp
CB
Coord arcsec 2000
21 20 17.46 +49 20 35.7
Date first
1881
Date last
2016
Obs
9
Pa first
6
Pa last
8
P.A. Now (θ)
Sep first
6.5
Sep last
8.1
Sep. Now (ρ)
8.1"
Mag pri
9.01
Mag sec
10.08
delta mag (ΔM)
1.07
Spectral class
Pri motion ra
Sec motion ra
-006
Pri motion dec
Sec motion dec
-006
Notes
Nature of this double is uncertain.
 
 
21203+4921 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21203+4921 BU 839 AB 1881 2016 12 208 14.5 8.55 10.08 1.53
Show 21203+4921 BU 839 AC 1881 2016 18 201 22.5 8.55 9.01 0.46
Show 21203+4921 BU 839 CB 1881 2016 9 8 8.1 9.01 10.08 1.07 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
7.9
Precise sep
8.129
Constellation
Cygnus
last precise pa
7.9
last precise sep
8.129
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21203+4921 BU 839 CB 1998 9 29 13.6 9.60 12.20 D 212017.46+492035.7
21203+4921 BU 839 CB 2003 10 30 13.7 9.40 12.00 D 212017.46+492035.7
21203+4921 BU 839 CB 2016 9 8 8.1 9.01 10.08 212017.46+492035.7

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