21577-0038 A   891

 
 
21h 57m 41.19s -00 37' 44.3" P.A. 78.00 sep 0.7 mag 9.50,9.55 Sp G0
 
 
Coord 2000
21577-0038
Discov num
A   891
Comp
Coord arcsec 2000
21 57 41.19 -00 37 44.3
Date first
1904
Date last
2018
Obs
25
Pa first
57
Pa last
78
P.A. Now (θ)
78°
Sep first
0.4
Sep last
0.7
Sep. Now (ρ)
0.7"
Mag pri
9.50
Mag sec
9.55
delta mag (ΔM)
0.05
Spectral class
G0 (yellow)
Pri motion ra
-059
Sec motion ra
-059
Pri motion dec
-060
Sec motion dec
-060
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
77.7
Precise sep
0.65
Constellation
Hydra
SAO
145771
Tycho2
5211-00561-1
HD
208643
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21577-0038 A 891 1995 24 73 0.6 9.50 9.55 G0 D 215741.19-003744.3
21577-0038 A 891 2008 26 76 0.6 9.50 9.55 G0 D 215741.19-003744.3
21577-0038 A 891 2018 24 78 0.7 9.50 9.55 G0 215741.19-003744.3

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