21556+2823 MLB 577BC

 
 
21h 55m 34.30s +28 23' 54.1" P.A. 20 sep 7 mag 11.10,12.60
 
 
Coord 2000
21556+2823
Discov num
MLB 577
Comp
BC
Coord arcsec 2000
21 55 34.30 +28 23 54.1
Date first
1928
Date last
2010
Obs
4
Pa first
25
Pa last
20
P.A. Now (θ)
20°
Sep first
5.7
Sep last
7.0
Sep. Now (ρ)
7"
Mag pri
11.10
Mag sec
12.60
delta mag (ΔM)
1.5
Spectral class
Pri motion ra
-006
Sec motion ra
Pri motion dec
-007
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
21556+2823 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 21556+2823 MLB 577 AB 1899 2010 6 300 48.8 10.57 12.41 1.84
Show 21556+2823 MLB 577 BC 1928 2010 4 20 7.0 11.10 12.60 1.50 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
19.8
Precise sep
7.04
Constellation
Pegasus
last precise pa
19.8
last precise sep
7.04
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21556+2823 MLB 577 BC 1997 2 22 6.0 11.00 12.50 D 215534.30+282354.1
21556+2823 MLB 577 BC 2010 3 20 7.0 11.00 12.50 D 215534.30+282354.1

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