18175-1828 RST 3170 AB

 
 
18h 17m 28.56s -18° 27' 48.4" P.A. 169.00 sep 8.6 mag 6.54,13.00 Sp O7III+O8 dist. 628.93 pc (2051.57 l.y.)
 
 
Coord 2000 18175-1828 Discov num RST3170 Comp AB Coord arcsec 2000 18 17 28.56 -18 27 48.4
Date first 1933 Date last 2015 Obs 5
Pa first 170 Pa last 168.7 P.A. Now (θ) 168.7°
Sep first 8.4 Sep last 8.561 Sep. Now (ρ) 8.561"
Mag pri 6.54 Mag sec 13.00 delta mag (ΔM) 6.46 Spectral class O7III+O8 (blue/blue)
Pri motion ra +003 Sec motion ra
Pri motion dec -007 Sec motion dec
Notes N U (See Notes, Proper motion indicates non-physical)
This double is not physical.
 
 
18175-1828 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 161267 18 17 29 -18 27 48 OCC 12 Aa,Ab 1923 0 -1 0.1 7.20 7.20 0.00
Show 161267 18 17 29 -18 27 48 RST 3170 AB 2015 5 169 8.6 6.54 13.00 6.46 <===
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Sagittarius SAO 161267 HIP 89630 Tycho2 6269-02759-1
Gaia DR2 4094879303848709376 HD 167771 HR 6841 GC 24950
BD BD-18 4886 Distance 628.93 Distance ly 2051.57