20421+5013 ES   91BC

 
 
20h 42m 03.89s +50 13' 44.8" P.A. 247 sep 14.7 mag 11.05,11.66
 
 
Coord 2000
20421+5013
Discov num
ES   91
Comp
BC
Coord arcsec 2000
20 42 03.89 +50 13 44.8
Date first
1899
Date last
2003
Obs
10
Pa first
239
Pa last
247
P.A. Now (θ)
247°
Sep first
16.6
Sep last
14.7
Sep. Now (ρ)
14.7"
Mag pri
11.05
Mag sec
11.66
delta mag (ΔM)
0.61
Spectral class
Pri motion ra
-037
Sec motion ra
-010
Pri motion dec
-154
Sec motion dec
-004
Notes
rPM=0.962
This double is not physical.
 
 
20421+5013 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 20421+5013 ES 91 AB 1901 2003 9 189 4.5 11.54 11.70 0.16
Show 20421+5013 ES 91 AC 1901 2003 9 235 17.5 11.54 11.66 0.12
Show 20421+5013 ES 91 BC 1899 2003 10 247 14.7 11.05 11.66 0.61 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
247.2
Precise sep
14.74
Constellation
Cygnus
last precise pa
247.2
last precise sep
14.74
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
20421+5013 ES 91 BC 2003 9 247 14.7 9.70 9.80 D 204203.89+501344.8
20421+5013 ES 91 BC 2010 11 239 16.2 11.05 11.66 204203.89+501344.8

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