18187-1837 BU 639 AB

 
 
18h 18m 43.26s -18° 37' 10.8" P.A. 136.00 sep 0.5 mag 7.20,8.20 Sp B0Ib
 
 
Coord 2000 18187-1837 Discov num BU  639 Comp AB Coord arcsec 2000 18 18 43.26 -18 37 10.8
Date first 1878 Date last 2017 Obs 32
Pa first 155 Pa last 136 P.A. Now (θ) 136°
Sep first 0.6 Sep last 0.467 Sep. Now (ρ) 0.467"
Mag pri 7.20 Mag sec 8.20 delta mag (ΔM) 1 Spectral class B0Ib (blue-white)
Pri motion ra +004 Sec motion ra
Pri motion dec -004 Sec motion dec
Notes N (See Notes)
Nature of this double is uncertain.
 
 
18187-1837 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 161304 18 18 43 -18 37 11 BU 639 AB 2017 32 136 0.5 7.20 8.20 1.00 <===
Show NSV10543 161304 18 18 43 -18 37 11 SHJ 264 AB,C 2019 59 50 17.2 6.86 7.63 0.77
Show 161304 18 18 43 -18 37 11 FOX 225 AB,E 2000 7 328 145.6 6.86 10.78 3.92
Show 18 18 44 -18 36 60 BU 300 CD 2015 10 329 6.3 7.63 13.10 5.47
Quintuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Var name NSV10543 Constellation Sagittarius SAO 161304 Tycho2 6269-04010-1
Gaia DR2 4096324302654797952 HD 168021 HR 6848 GC 24978
ADS 11240