16212-2536 BLM   4Aa,Ab

 
 
16H 21M 11.32S -25 35' 33.9" P.A. 225 SEP 0.5 MAG 3.06,5.24 SP B0.5III DIST. 213.68 PC (697.02 L.Y.)
 
 
Coord 2000
16212-2536
Discov num
BLM   4
Comp
Aa,Ab
Coord arcsec 2000
16 21 11.32 -25 35 33.9
Date first
1976
Date last
2016
Obs
23
Pa first
292
Pa last
225
P.A. Now (θ)
225°
Sep first
0.3
Sep last
0.5
Sep. Now (ρ)
0.5"
Mag pri
3.06
Mag sec
5.24
delta mag (ΔM)
2.18
Spectral class
B0.5III (blue-white)
Pri motion ra
-011
Sec motion ra
Pri motion dec
-016
Sec motion dec
Notes
N (See Notes)
Nature of this double is uncertain.
 
 
16212-2536 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 184336 16212-2536 NOR 1 Aa1,2 2010 2010 1 89 0.0 3.30 4.10 0.80 Y
Show 184336 16212-2536 BLM 4 Aa,Ab 1976 2016 23 225 0.5 3.06 5.24 2.18 <===
Show Alniyat 184336 16212-2536 H 4 121 AB 1783 2016 44 273 20.3 2.89 8.42 5.53
Quadruple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Scorpius
SAO
184336
HIP
80112
Tycho2
6798-00540-1
HD
147165
HR
6084
GC
21982
CD
CD-2511485
CP
CP-25 5785
Bayer
Sigma Scorpii
Bayer name
Sig Sco
Flamsteed
20 Scorpii
Flamsteed name
20 Sco
Distance
213.68
Distance ly
697.02
last precise pa
225
last precise sep
0.5