20422+5020 BU 675 AB (51 Cyg)

 
 
20h 42m 12.63s +50 20' 24.1" P.A. 102.00 sep 3.3 mag 5.38,12.40 Sp B2V dist. 390.63 pc (1274.24 l.y.)
 
 
Coord 2000 20422+5020 Discov num BU  675 Comp AB Coord arcsec 2000 20 42 12.63 +50 20 24.1
Date first 1878 Date last 2015 Obs 9
Pa first 102 Pa last 101.5 P.A. Now (θ) 101.5°
Sep first 3.1 Sep last 3.279 Sep. Now (ρ) 3.279"
Mag pri 5.38 Mag sec 12.40 delta mag (ΔM) 7.02 Spectral class B2V (blue-white)
Pri motion ra -003 Sec motion ra
Pri motion dec +002 Sec motion dec
Notes N S (See Notes, Parallax indidates non-physical)
This double is not physical.
 
 
20422+5020 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 51 Cyg 32809 20 42 13 +50 20 24 BU 675 AB 2015 9 102 3.3 5.38 12.40 7.02 <===
Show 32809 20 42 13 +50 20 24 BU 675 AC 2015 11 185 28.8 5.38 11.40 6.02
Show 32809 20 42 13 +50 20 24 BU 675 AD 2015 10 329 33.3 5.38 11.40 6.02
Show 32809 20 42 13 +50 20 24 BU 675 AE 2015 12 240 72.0 5.38 10.64 5.26
Quintuple system
5 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name 51 Cyg Constellation Cygnus SAO 32809 HIP 102177
Tycho2 3582-02132-1 Gaia DR2 2180349566689555200 HD 197511 HR 7929
GC 28865 ADS 14189 BD BD+49 3353 Flamsteed 51 Cygni
Flamsteed name 51 Cyg Distance 390.63 Distance ly 1274.24