18089-3115 B  2855

 
 
18h 08m 54.29s -31 14' 53.3" P.A. 243 sep 6.7 mag 9.51,12.50 Sp B6Ib/II
 
 
Coord 2000
18089-3115
Discov num
B  2855
Comp
Coord arcsec 2000
18 08 54.29 -31 14 53.3
Date first
1930
Date last
1999
Obs
4
Pa first
225
Pa last
243
P.A. Now (θ)
243°
Sep first
6.0
Sep last
6.7
Sep. Now (ρ)
6.7"
Mag pri
9.51
Mag sec
12.50
delta mag (ΔM)
2.99
Spectral class
B6Ib/II (blue-white)
Pri motion ra
+007
Sec motion ra
Pri motion dec
-004
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
243
Precise sep
6.745
Constellation
Sagittarius
SAO
209767
Tycho2
7391-00374-1
HD
165747
last precise pa
243
last precise sep
6.745
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18089-3115 B 2855 1998 3 243 6.7 9.51 12.50 B6Ib/II D 180854.29-311453.3
18089-3115 B 2855 1999 4 243 6.7 9.51 12.50 B6Ib/II D 180854.29-311453.3
18089-3115 B 2855 2010 5 250 6.4 9.51 12.50 B6Ib/II 180854.29-311453.3

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