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
Cdsa2 id
BU 839 CB
Constellation
Cygnus
Ra deg
21.338183333333333
De deg
49.343250000000005
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

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