21009+4730 BU 1290CD

 
 
21h 02m 40.75s +45 53' 05.2" P.A. 90 sep 2.9 mag 14.00,15.00
 
 
Coord 2000
21009+4730
Discov num
BU 1290
Comp
CD
Coord arcsec 2000
21 02 40.75 +45 53 05.2
Date first
2006
Date last
2006
Obs
1
Pa first
90
Pa last
90
P.A. Now (θ)
90°
Sep first
2.9
Sep last
2.9
Sep. Now (ρ)
2.9"
Mag pri
14.00
Mag sec
15.00
delta mag (ΔM)
1
Spectral class
Pri motion ra
+395
Sec motion ra
Pri motion dec
+142
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
21009+4730 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21009+4730 BU 1290 AB 1898 2010 17 33 8.6 10.09 10.65 0.56
Show 21009+4730 BU 1290 AC 1898 2006 2 267 3.5 10.09 14.00 3.91
Show 21009+4730 BU 1290 BD 1898 2006 2 21 2.5 10.65 15.00 4.35
Show 21009+4730 BU 1290 CD 2006 2006 1 90 2.9 14.00 15.00 1.00 <===
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
90
Precise sep
2.9
Constellation
Cygnus
last precise pa
90
last precise sep
2.9
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21009+4730 BU 1290 CD 2006 1 90 2.9 14.00 15.00 210240.75+455305.2

If you need more information about this double, apply for a data request form to the WDS.