16543-4017 I   994AB

 
 
16h 54m 19.18s -40 17' 06.7" P.A. 284 sep 2.8 mag 11.30,11.50 Sp B8
 
 
Coord 2000
16543-4017
Discov num
I   994
Comp
AB
Coord arcsec 2000
16 54 19.18 -40 17 06.7
Date first
1910
Date last
2000
Obs
5
Pa first
300
Pa last
284
P.A. Now (θ)
284°
Sep first
1.5
Sep last
2.8
Sep. Now (ρ)
2.8"
Mag pri
11.30
Mag sec
11.50
delta mag (ΔM)
0.2
Spectral class
B8 (blue-white)
Pri motion ra
-124
Sec motion ra
Pri motion dec
+045
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
16543-4017 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 16543-4017 I 994 AB 1910 2000 5 284 2.8 11.30 11.50 0.20 <===
Show 16543-4017 WG 190 AC 1901 1999 4 96 8.8 11.30 13.00 1.70
Show 16543-4017 I 994 AD 1901 2000 5 280 14.0 11.30 12.80 1.50
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
284.1
Precise sep
2.83
Constellation
Scorpius
Tycho2
7872-00170-1
HD
322254
last precise pa
284.1
last precise sep
2.83
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
16543-4017 I 994 AB 1952 4 295 2.1 10.66 11.20 B8 165419.44-401707.5
16543-4017 I 994 AB 2000 5 284 2.8 11.30 11.50 B8 165419.18-401706.7

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