18554+1331 BU  647AC

 
 
18h 55m 26.45s +13 31' 06.8" P.A. 218 sep 18.5 mag 9.95,10.27 Sp B9
 
 
Coord 2000
18554+1331
Discov num
BU  647
Comp
AC
Coord arcsec 2000
18 55 26.45 +13 31 06.8
Date first
1877
Date last
2016
Obs
26
Pa first
217
Pa last
218
P.A. Now (θ)
218°
Sep first
20.0
Sep last
18.5
Sep. Now (ρ)
18.5"
Mag pri
9.95
Mag sec
10.27
delta mag (ΔM)
0.32
Spectral class
B9 (blue-white)
Pri motion ra
+003
Sec motion ra
+000
Pri motion dec
-006
Sec motion dec
+001
Notes
N (See Notes)
rPM=1.135
This double is not physical.
 
 
18554+1331 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 104260 18554+1331 BU 647 AB 1877 2016 18 6 1.3 9.95 10.66 0.71
Show 104260 18554+1331 BU 647 AC 1877 2016 26 218 18.5 9.95 10.27 0.32 <===
Show 104260 18554+1331 FOX9032 AD 1913 2001 3 87 37.5 9.95 13.75 3.80
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
218.4
Precise sep
18.546
Constellation
Hercules
SAO
104260
Tycho2
1051-00204-1
HD
230073
last precise pa
218.4
last precise sep
18.546
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18554+1331 BU 647 AC 2004 23 218 18.8 9.95 10.27 N D 185526.45+133106.8
18554+1331 BU 647 AC 2016 26 218 18.5 9.95 10.27 B9 N 185526.45+133106.8

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