21009+4730 BU 1290 BD

 
 
21h 00m 56.53s +47° 29' 44.5" P.A. 22.00 sep 2.5 mag 10.65,15.00
 
 
Coord 2000 21009+4730 Discov num BU 1290 Comp BD Coord arcsec 2000 21 00 56.53 +47 29 44.5
Date first 1898 Date last 2016 Obs 4
Pa first 25 Pa last 21.6 P.A. Now (θ) 21.6°
Sep first 2.4 Sep last 2.489 Sep. Now (ρ) 2.489"
Mag pri 10.65 Mag sec 15.00 delta mag (ΔM) 4.35 Spectral class
Pri motion ra +041 Sec motion ra
Pri motion dec +047 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
21009+4730 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 21 00 56 +47 29 37 BU 1290 AB 2019 20 35 9.3 10.09 10.65 0.56
Show 21 00 56 +47 29 37 BU 1290 AC 2016 3 266 3.5 10.09 14.00 3.91
Show 21 00 57 +47 29 44 BU 1290 BD 2016 4 22 2.5 10.65 15.00 4.35 <===
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Cygnus Tycho2 3592-04619-2 Gaia DR2 2163900078160233984