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
Cdsa2 id
BU 1290 CD
Constellation
Cygnus
Ra deg
21.04465277777778
De deg
45.88477777777778
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

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