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
Cdsa2 id
ES 91 BC
Constellation
Cygnus
Ra deg
20.701080555555556
De deg
50.229111111111116
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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