18177-1940 WSI 89 Ba,Bb

 
 
18h 17m 39.98s -19° 40' 19.9" P.A. 321.00 sep 0.1 mag 8.70,9.60 Sp B1/B2III
 
 
Coord 2000 18177-1940 Discov num WSI  89 Comp Ba,Bb Coord arcsec 2000 18 17 39.98 -19 40 19.9
Date first 2008 Date last 2021 Obs 16
Pa first 5 Pa last 321.4 P.A. Now (θ) 321.4°
Sep first 0.1 Sep last 0.052 Sep. Now (ρ) 0.052"
Mag pri 8.70 Mag sec 9.60 delta mag (ΔM) 0.9 Spectral class B1/B2III (blue-white)
Pri motion ra +002 Sec motion ra
Pri motion dec -002 Sec motion dec
Notes
Nature of this double is uncertain.
 
 
18177-1940 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 167815 161273 18 17 40 -19 40 20 BU 246 AB 2021 43 116 0.5 8.40 8.27 0.13
Show 18 17 40 -19 40 20 WSI 89 Ba,Bb 2021 16 321 0.1 8.70 9.60 0.90 <===
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Sagittarius