20213+3035 WJD   1

 
 
20h 21m 17.50s +30 34' 41.2" P.A. 262 sep 8.8 mag 11.06,13.50 Sp M4III
 
 
Coord 2000
20213+3035
Discov num
WJD   1
Comp
Coord arcsec 2000
20 21 17.50 +30 34 41.2
Date first
2000
Date last
2015
Obs
8
Pa first
264
Pa last
262
P.A. Now (θ)
262°
Sep first
9.2
Sep last
8.8
Sep. Now (ρ)
8.8"
Mag pri
11.06
Mag sec
13.50
delta mag (ΔM)
2.44
Spectral class
M4III (red)
Pri motion ra
+004
Sec motion ra
Pri motion dec
+000
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
261.9
Precise sep
8.834
Constellation
Cygnus
SAO
69879
Tycho2
2672-01449-1
Gaia DR2
20387732992
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20213+3035 WJD 1 2002 2 255 8.1 11.06 13.50 202117.50+303441.2
20213+3035 WJD 1 2009 3 262 8.3 11.06 13.50 202117.50+303441.2
20213+3035 WJD 1 2015 8 262 8.8 11.06 13.50 M4III 202117.50+303441.2

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