16212-2536 BLM 4 Aa,Ab

 
 
16h 21m 11.32s -25° 35' 33.9" P.A. 217.00 sep 0.4 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 2019 Obs 28
Pa first 292 Pa last 217.1 P.A. Now (θ) 217.1°
Sep first 0.3 Sep last 0.423 Sep. Now (ρ) 0.423"
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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 184336 16 21 11 -25 35 34 NOR 1 Aa1,2 2010 1 89 0.0 3.30 4.10 0.80 Y
Show 184336 16 21 11 -25 35 34 BLM 4 Aa,Ab 2019 28 217 0.4 3.06 5.24 2.18 <===
Show Alniyat 184336 16 21 11 -25 35 34 H 4 121 AB 2019 45 269 20.5 2.89 8.42 5.53
Quadruple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Scorpius SAO 184336 HIP 80112 Tycho2 6798-00540-1
Gaia DR2 6048602103659567488 HD 147165 HR 6084 GC 21982
ADS 10009 CD CD-2511485 CP CP-25 5785 Bayer Sigma Scorpii
Bayer name Sig Sco Flamsteed 20 Scorpii Flamsteed name 20 Sco FK5 607
Distance 213.68 Distance ly 697.02 Bayer greek σ Sco