21167+0731 HDS3030

 
 
21h 16m 40.05s +07 30' 53.2" P.A. 285 sep 0.2 mag 7.82,8.99 Sp F2
 
 
Coord 2000
21167+0731
Discov num
HDS3030
Comp
Coord arcsec 2000
21 16 40.05 +07 30 53.2
Date first
1991
Date last
2017
Obs
7
Pa first
285
Pa last
285
P.A. Now (θ)
285°
Sep first
0.1
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
7.82
Mag sec
8.99
delta mag (ΔM)
1.17
Spectral class
F2 (yellow-white)
Pri motion ra
+004
Sec motion ra
Pri motion dec
-042
Sec motion dec
Notes
X (Dubious double)
rPM=0.298 (< 0.3, Physical double)
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Spectr
M3.5+M5.0
last precise pa
285.2
last precise sep
0.187
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21167+0731 HDS3030 1991 1 285 0.1 7.82 8.99 F2 X 211640.05+073053.2
21167+0731 HDS3030 2008 5 291 0.1 7.82 8.99 F2 XD 211640.05+073053.2
21167+0731 HDS3030 2015 6 286 0.2 7.82 8.99 F2 X 211640.05+073053.2
21167+0731 HDS3030 2017 7 285 0.2 7.82 8.99 F2 X 211640.05+073053.2

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