20311+3847 SEI1150

 
 
20h 31m 05.27s +38 47' 01.8" P.A. 74.00 sep 21.6 mag 11.28,12.30 Sp F2
 
 
Coord 2000
20311+3847
Discov num
SEI1150
Comp
Coord arcsec 2000
20 31 05.27 +38 47 01.8
Date first
1895
Date last
2015
Obs
12
Pa first
75
Pa last
74
P.A. Now (θ)
74°
Sep first
22.3
Sep last
21.6
Sep. Now (ρ)
21.6"
Mag pri
11.28
Mag sec
12.30
delta mag (ΔM)
1.02
Spectral class
F2 (yellow-white)
Pri motion ra
-012
Sec motion ra
-023
Pri motion dec
-104
Sec motion dec
-098
Notes
N (See Notes)
Visually invisible, K-band or other infrared star rPM=0.12 (< 0.3, Physical double)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
74.4
Precise sep
21.56
Constellation
Cygnus
Gaia DR2
26079227648
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20311+3847 SEI1150 1998 4 74 21.6 9.50 11.00 D 203105.25+384700.6
20311+3847 SEI1150 2002 6 74 21.6 11.28 12.30 N D 203105.27+384701.8
20311+3847 SEI1150 2010 7 75 21.6 11.28 12.30 F2 N 203105.27+384701.8
20311+3847 SEI1150 2015 8 74 21.6 11.28 12.30 F2 N 203105.27+384701.8

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