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)
rPM=0.074 (< 0.3, Physical double)
This double is physical.
 
 
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
 
 
Precise pa
250.1
Precise sep
144.86
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
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
12289+2555 STFA 21 AB 2002 40 251 146.2 5.23 6.64 A0p N D 122854.72+255446.4
12289+2555 STFA 21 AB 2009 41 251 144.2 5.23 6.64 A0p N D 122854.72+255446.4
12289+2555 STFA 21 AB 2012 42 250 143.5 5.23 6.64 A0p N D 122854.72+255446.4

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