20397+3644 SEI1209

 
 
20h 39m 44.97s +36 43' 57.5" P.A. 15.00 sep 21.4 mag 11.43,11.80
 
 
Coord 2000
20397+3644
Discov num
SEI1209
Comp
Coord arcsec 2000
20 39 44.97 +36 43 57.5
Date first
1896
Date last
2015
Obs
12
Pa first
15
Pa last
15
P.A. Now (θ)
15°
Sep first
20.9
Sep last
21.4
Sep. Now (ρ)
21.4"
Mag pri
11.43
Mag sec
11.80
delta mag (ΔM)
0.37
Spectral class
Pri motion ra
+001
Sec motion ra
+004
Pri motion dec
-013
Sec motion dec
-008
Notes
rPM=0.447
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
15.2
Precise sep
21.379
Constellation
Cygnus
Tycho2
2698-01466-1
Gaia DR2
94106104576
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20397+3644 SEI1209 1998 5 15 21.3 11.43 11.80 D 203944.97+364357.5
20397+3644 SEI1209 2002 6 15 21.3 11.43 11.80 D 203944.97+364357.5
20397+3644 SEI1209 2010 7 15 21.3 11.43 11.80 203944.97+364357.5
20397+3644 SEI1209 2015 8 15 21.4 11.43 11.80 203944.97+364357.5

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