21397+5815 MLB  90AB

 
 
21h 39m 44.44s +58 14' 44.0" P.A. 37 sep 8.2 mag 9.16,11.98 Sp B5 dist. 469.48 pc (1531.44 l.y.)
 
 
Coord 2000
21397+5815
Discov num
MLB  90
Comp
AB
Coord arcsec 2000
21 39 44.44 +58 14 44.0
Date first
1905
Date last
2016
Obs
14
Pa first
41
Pa last
37
P.A. Now (θ)
37°
Sep first
8.7
Sep last
8.2
Sep. Now (ρ)
8.2"
Mag pri
9.16
Mag sec
11.98
delta mag (ΔM)
2.82
Spectral class
B5 (blue-white)
Pri motion ra
-002
Sec motion ra
-006
Pri motion dec
-006
Sec motion dec
-004
Notes
rPM=0.62
Nature of this double is uncertain.
 
 
21397+5815 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 33643 21397+5815 MLB 90 AB 1905 2016 14 37 8.2 9.16 11.98 2.82 <===
Show 33643 21397+5815 MLB 90 AC 1905 2016 6 136 29.7 9.16 11.34 2.18
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
36.6
Precise sep
8.173
Constellation
Cepheus
SAO
33643
HIP
106956
Tycho2
3979-01003-1
HD
239731
BD
BD+57 2360
Distance
469.48
Distance ly
1531.44
last precise pa
36.6
last precise sep
8.173
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
21397+5815 MLB 90 AB 2000 5 36 8.2 9.16 11.98 B5 D 213944.44+581444.0
21397+5815 MLB 90 AB 2003 6 37 8.1 9.16 11.98 B5 D 213944.44+581444.0
21397+5815 MLB 90 AB 2016 14 37 8.2 9.16 11.98 B5 213944.44+581444.0

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