20312+5714 A   872

 
 
20h 31m 09.67s +57 13' 39.3" P.A. 182 sep 0.2 mag 9.90,10.30 Sp A0
 
 
Coord 2000
20312+5714
Discov num
A   872
Comp
Coord arcsec 2000
20 31 09.67 +57 13 39.3
Date first
1904
Date last
2008
Obs
7
Pa first
191
Pa last
182
P.A. Now (θ)
182°
Sep first
0.3
Sep last
0.2
Sep. Now (ρ)
0.2"
Mag pri
9.90
Mag sec
10.30
delta mag (ΔM)
0.4
Spectral class
A0 (white)
Pri motion ra
+002
Sec motion ra
Pri motion dec
-004
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
181.6
Precise sep
0.227
Constellation
Cygnus
SAO
32650
Tycho2
3958-01088-1
Gaia DR2
65436648064
HD
239434
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20312+5714 A 872 1982 6 194 0.2 9.90 10.30 A0 203109.67+571339.3
20312+5714 A 872 2008 7 182 0.2 9.90 10.30 A0 203109.67+571339.3

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