12289+2555 STFA 21AB (17 Com)

 
 
12H 28M 54.72S +25 54' 46.4" P.A. 250 SEP 144.9 MAG 5.23,6.64 SP A0P DIST. 72.89 PC (237.77 L.Y.)
 
 
Coord 2000
12289+2555
Discov num
STFA 21
Comp
AB
Coord arcsec 2000
12 28 54.72 +25 54 46.4
Date first
1836
Date last
2012
Obs
46
Pa first
251
Pa last
250
P.A. Now (θ)
250°
Sep first
145.3
Sep last
144.9
Sep. Now (ρ)
144.9"
Mag pri
5.23
Mag sec
6.64
delta mag (ΔM)
1.41
Spectral class
A0p (white)
Pri motion ra
-022
Sec motion ra
-020
Pri motion dec
-016
Sec motion dec
-016
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
12289+2555 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 17 Com 82330 12289+2555 STFA 21 AB 1836 2012 46 250 144.9 5.23 6.64 1.41 <===
Show 82330 12289+2555 BU 1080 AD 1896 2001 6 269 324.2 5.23 11.63 6.40
Show 82330 12289+2555 SLE 898 AE 1985 2001 3 270 447.5 5.23 13.60 8.37
Show 82330 12289+2555 SLE 898 AF 1985 2001 3 146 125.9 5.23 13.92 8.69
Show 82328 12289+2555 BU 1080 BC 1889 2009 3 175 1.5 6.64 13.70 7.06
Show 82328 12289+2555 BU 1080 BD 1896 2001 6 284 193.0 6.64 11.63 4.99
Sextuple system
6 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name
17 Com
Var name
AI Com
Constellation
Coma Berenices
SAO
82330
HIP
60904
Tycho2
1989-03206-1
HD
108662
HR
4752
GC
17012
BD
BD+26 2354
Flamsteed
17 Comae Berenices
Flamsteed name
17 Com
Distance
72.89
Distance ly
237.77
last precise pa
250.1
last precise sep
144.86