18187-1837 BU 300 CD

 
 
18h 18m 44.20s -18° 36' 59.9" P.A. 329.00 sep 6.3 mag 7.63,13.10 Sp B5
 
 
Coord 2000 18187-1837 Discov num BU  300 Comp CD Coord arcsec 2000 18 18 44.20 -18 36 59.9
Date first 1874 Date last 2015 Obs 10
Pa first 330 Pa last 328.6 P.A. Now (θ) 328.6°
Sep first 4.0 Sep last 6.3 Sep. Now (ρ) 6.3"
Mag pri 7.63 Mag sec 13.10 delta mag (ΔM) 5.47 Spectral class B5 (blue-white)
Pri motion ra -001 Sec motion ra
Pri motion dec +002 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
 
 
Constellation Sagittarius Tycho2 6269-04009-1 Gaia DR2 4096324307033587584