20422+5020 BU 675 AC

 
 
20h 42m 12.63s +50° 20' 24.1" P.A. 185.00 sep 28.8 mag 5.38,11.40 Sp B2V dist. 390.63 pc (1274.24 l.y.)
 
 
Coord 2000 20422+5020 Discov num BU  675 Comp AC Coord arcsec 2000 20 42 12.63 +50 20 24.1
Date first 1878 Date last 2015 Obs 11
Pa first 182 Pa last 184.9 P.A. Now (θ) 184.9°
Sep first 25.4 Sep last 28.839 Sep. Now (ρ) 28.839"
Mag pri 5.38 Mag sec 11.40 delta mag (ΔM) 6.02 Spectral class B2V (blue-white)
Pri motion ra +002 Sec motion ra -006
Pri motion dec +002 Sec motion dec -029
Notes N (See Notes)
rPM=1.081
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
 
 
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