18153-1900 BU 284 AF

 
 
18h 15m 16.76s -18° 59' 33.9" P.A. 267.00 sep 138.7 mag 7.09,9.50 Sp B1Ib
 
 
Coord 2000 18153-1900 Discov num BU  284 Comp AF Coord arcsec 2000 18 15 16.76 -18 59 33.9
Date first 1890 Date last 2015 Obs 8
Pa first 269 Pa last 266.9 P.A. Now (θ) 266.9°
Sep first 138.9 Sep last 138.704 Sep. Now (ρ) 138.704"
Mag pri 7.09 Mag sec 9.50 delta mag (ΔM) 2.41 Spectral class B1Ib (blue-white)
Pri motion ra -001 Sec motion ra +001
Pri motion dec -002 Sec motion dec -008
Notes
rPM=0.784
Nature of this double is uncertain.
 
 
18153-1900 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 167287 161217 18 15 17 -18 59 34 BU 284 AB 2017 13 358 18.1 7.09 11.50 4.41
Show 161217 18 15 17 -18 59 34 BU 284 AC 2015 11 86 31.1 7.09 12.20 5.11
Show 161217 18 15 17 -18 59 34 BU 284 AD 2018 13 192 57.8 7.09 9.70 2.61
Show 161217 18 15 17 -18 59 34 BU 284 AE 2017 13 188 75.3 7.09 10.34 3.25
Show 161217 18 15 17 -18 59 34 BU 284 AF 2015 8 267 138.7 7.09 9.50 2.41 <===
Show 161217 18 15 17 -18 59 34 BU 284 AG 2017 12 200 12.4 7.09 11.00 3.91
Show 161217 18 15 17 -18 59 34 BU 284 AH 2017 12 67 21.0 7.09 10.70 3.61
Show 161217 18 15 17 -18 59 34 BU 284 AS 2015 5 103 19.1 7.09 13.00 5.91
Show 18 15 17 -18 59 16 BU 284 BR 2015 8 326 5.2 11.50 12.00 0.50
Show 18 15 19 -18 59 32 ARA 743 CQ 2015 7 298 13.1 12.20 12.70 0.50
11-fold system
11 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Sagittarius SAO 161217 Tycho2 6272-00830-1 Gaia DR2 4094832952561701888
HD 167287