20400-4359 DON 990AB

 
 
20h 39m 57.04s -43 59' 09.6" P.A. 42.00 sep 0.4 mag 10.15,11.20 Sp G0V
 
 
Coord 2000
20400-4359
Discov num
DON 990
Comp
AB
Coord arcsec 2000
20 39 57.04 -43 59 09.6
Date first
1929
Date last
1984
Obs
4
Pa first
35
Pa last
42
P.A. Now (θ)
42°
Sep first
0.3
Sep last
0.4
Sep. Now (ρ)
0.4"
Mag pri
10.15
Mag sec
11.20
delta mag (ΔM)
1.05
Spectral class
G0V (yellow)
Pri motion ra
+064
Sec motion ra
Pri motion dec
-043
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
20400-4359 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 230314 20400-4359 DON 990 AB 1929 1984 4 42 0.4 10.15 11.20 1.05 <===
Show 230314 20400-4359 DON 990 AC 1929 2015 4 292 7.0 10.15 14.20 4.05
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
42
Precise sep
0.38
Constellation
Microscopium
SAO
230314
Tycho2
7962-00616-1
Gaia DR2
6676167464927103872
HD
196562
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20400-4359 DON 990 AB 1984 4 42 0.4 10.70 11.20 G0V 203957.04-435909.6

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