20028+3742 SEI 817

 
 
20h 02m 49.34s +37 42' 00.4" P.A. 102 sep 21.6 mag 10.02,12.20 Sp B
 
 
Coord 2000
20028+3742
Discov num
SEI 817
Comp
Coord arcsec 2000
20 02 49.34 +37 42 00.4
Date first
1896
Date last
2015
Obs
11
Pa first
96
Pa last
102
P.A. Now (θ)
102°
Sep first
23.4
Sep last
21.6
Sep. Now (ρ)
21.6"
Mag pri
10.02
Mag sec
12.20
delta mag (ΔM)
2.18
Spectral class
B (blue-white)
Pri motion ra
-005
Sec motion ra
-020
Pri motion dec
-008
Sec motion dec
-032
Notes
rPM=0.75
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
101.6
Precise sep
21.59
Constellation
Cygnus
Tycho2
3150-02492-1
Gaia DR2
82612139520
HD
227319
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20028+3742 SEI 817 2000 4 101 21.8 10.02 12.20 B D 200249.34+374200.4
20028+3742 SEI 817 2002 5 101 21.7 10.02 12.20 B D 200249.34+374200.4
20028+3742 SEI 817 2010 6 102 21.4 10.02 12.20 B 200249.34+374200.4
20028+3742 SEI 817 2015 7 102 21.6 10.02 12.20 B 200249.34+374200.4

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