18317-1658 HU  243

 
 
18h 31m 44.65s -16 57' 32.1" P.A. 346 sep 1.4 mag 10.34,10.74 Sp B9III
 
 
Coord 2000
18317-1658
Discov num
HU  243
Comp
Coord arcsec 2000
18 31 44.65 -16 57 32.1
Date first
1900
Date last
1991
Obs
7
Pa first
355
Pa last
346
P.A. Now (θ)
346°
Sep first
1.3
Sep last
1.4
Sep. Now (ρ)
1.4"
Mag pri
10.34
Mag sec
10.74
delta mag (ΔM)
0.4
Spectral class
B9III (blue-white)
Pri motion ra
-002
Sec motion ra
-002
Pri motion dec
-007
Sec motion dec
-007
Notes
Nature of this double is uncertain.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
346.4
Precise sep
1.429
Constellation
Sagittarius
Tycho2
6270-01039-2
last precise pa
346.4
last precise sep
1.429
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18317-1658 HU 243 1991 7 346 1.4 10.34 10.74 B9III 183144.65-165732.1

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