18255-3015 B   939

 
 
18h 25m 30.07s -30 15' 12.4" P.A. 181 sep 4.2 mag 7.64,11.60 Sp B8 dist. 364.96 pc (1190.5 l.y.)
 
 
Coord 2000
18255-3015
Discov num
B   939
Comp
Coord arcsec 2000
18 25 30.07 -30 15 12.4
Date first
1927
Date last
1999
Obs
5
Pa first
192
Pa last
181
P.A. Now (θ)
181°
Sep first
5.0
Sep last
4.2
Sep. Now (ρ)
4.2"
Mag pri
7.64
Mag sec
11.60
delta mag (ΔM)
3.96
Spectral class
B8 (blue-white)
Pri motion ra
+000
Sec motion ra
+000
Pri motion dec
-005
Sec motion dec
-005
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
181
Precise sep
4.23
Constellation
Sagittarius
SAO
210128
HIP
90300
Tycho2
7393-01132-1
HD
169337
CD
CD-3015667
Distance
364.96
Distance ly
1190.5
last precise pa
181
last precise sep
4.23
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18255-3015 B 939 1991 4 190 5.0 7.64 11.60 B8 D 182530.07-301512.4
18255-3015 B 939 1999 5 181 4.2 7.64 11.60 B8 D 182530.07-301512.4

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