20240-4231 DON 984

 
 
20h 24m 02.49s -42 31' 05.3" P.A. 258 sep 0.9 mag 9.65,9.62 Sp A2V
 
 
Coord 2000
20240-4231
Discov num
DON 984
Comp
Coord arcsec 2000
20 24 02.49 -42 31 05.3
Date first
1930
Date last
2008
Obs
4
Pa first
249
Pa last
258
P.A. Now (θ)
258°
Sep first
0.7
Sep last
0.9
Sep. Now (ρ)
0.9"
Mag pri
9.65
Mag sec
9.62
delta mag (ΔM)
0.03
Spectral class
A2V (white)
Pri motion ra
+017
Sec motion ra
+017
Pri motion dec
-006
Sec motion dec
-006
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
257.8
Precise sep
0.941
Constellation
Sagittarius
SAO
230186
Tycho2
7957-00425-1
Gaia DR2
64283089152
HD
193831
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20240-4231 DON 984 1991 3 249 0.4 9.65 9.62 A2V 202402.49-423105.3
20240-4231 DON 984 2008 4 258 0.9 9.65 9.62 A2V 202402.49-423105.3

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