20121+3938 SEI 997

 
 
20h 12m 03.92s +39 37' 42.2" P.A. 146 sep 10.3 mag 11.20,11.50
 
 
Coord 2000
20121+3938
Discov num
SEI 997
Comp
Coord arcsec 2000
20 12 03.92 +39 37 42.2
Date first
1892
Date last
2015
Obs
12
Pa first
148
Pa last
146
P.A. Now (θ)
146°
Sep first
10.4
Sep last
10.3
Sep. Now (ρ)
10.3"
Mag pri
11.20
Mag sec
11.50
delta mag (ΔM)
0.3
Spectral class
Pri motion ra
-002
Sec motion ra
-002
Pri motion dec
-002
Sec motion dec
-003
Notes
rPM=0.277 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
146.4
Precise sep
10.348
Constellation
Cygnus
Gaia DR2
40832179968
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20121+3938 SEI 997 1998 4 146 10.4 11.20 11.50 D 201203.92+393742.2
20121+3938 SEI 997 2006 5 146 10.3 11.20 11.50 D 201203.92+393742.2
20121+3938 SEI 997 2011 7 147 10.3 11.20 11.50 D 201203.92+393742.2
20121+3938 SEI 997 2015 8 146 10.3 11.20 11.50 201203.92+393742.2

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