18457-2847 B   404

 
 
18h 45m 39.85s -28 46' 38.6" P.A. 238 sep 5 mag 8.66,14.70 Sp B8/9II
 
 
Coord 2000
18457-2847
Discov num
B   404
Comp
Coord arcsec 2000
18 45 39.85 -28 46 38.6
Date first
1927
Date last
2000
Obs
2
Pa first
251
Pa last
238
P.A. Now (θ)
238°
Sep first
4.5
Sep last
5.0
Sep. Now (ρ)
5"
Mag pri
8.66
Mag sec
14.70
delta mag (ΔM)
6.04
Spectral class
B8/9II (blue-white)
Pri motion ra
+002
Sec motion ra
Pri motion dec
+009
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
237.6
Precise sep
4.96
Constellation
Sagittarius
SAO
187237
Tycho2
6871-00749-1
HD
173302
last precise pa
237.6
last precise sep
4.96
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18457-2847 B 404 2000 2 238 5.0 8.66 14.70 B8/9II D 184539.85-284638.6
18457-2847 B 404 2010 3 235 4.7 8.66 14.70 B8/9II 184539.85-284638.6

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