20391+3717 SEI1207

 
 
20h 39m 05.25s +37 16' 58.8" P.A. 121.00 sep 27.0 mag 11.94,12.40
 
 
Coord 2000
20391+3717
Discov num
SEI1207
Comp
Coord arcsec 2000
20 39 05.25 +37 16 58.8
Date first
1896
Date last
2015
Obs
13
Pa first
124
Pa last
121
P.A. Now (θ)
121°
Sep first
25.6
Sep last
27.0
Sep. Now (ρ)
27"
Mag pri
11.94
Mag sec
12.40
delta mag (ΔM)
0.46
Spectral class
Pri motion ra
+007
Sec motion ra
+023
Pri motion dec
-004
Sec motion dec
+001
Notes
rPM=0.728
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
120.5
Precise sep
27.025
Constellation
Cygnus
Tycho2
2698-00172-1
Gaia DR2
90225359744
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20391+3717 SEI1207 1998 6 121 26.8 11.94 12.40 D 203905.25+371658.8
20391+3717 SEI1207 2002 7 121 26.9 11.94 12.40 D 203905.25+371658.8
20391+3717 SEI1207 2010 8 121 27.0 11.94 12.40 203905.25+371658.8
20391+3717 SEI1207 2015 9 121 27.0 11.94 12.40 203905.25+371658.8

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