18210-1939 BU 48 AB (HD 168539)

 
 
18h 21m 01.51s -19° 39' 28.5" P.A. 349.00 sep 2.6 mag 8.05,9.58 Sp F0V
 
 
Coord 2000 18210-1939 Discov num BU   48 Comp AB Coord arcsec 2000 18 21 01.51 -19 39 28.5
Date first 1871 Date last 2016 Obs 26
Pa first 10 Pa last 349.3 P.A. Now (θ) 349.3°
Sep first 2.8 Sep last 2.613 Sep. Now (ρ) 2.613"
Mag pri 8.05 Mag sec 9.58 delta mag (ΔM) 1.53 Spectral class F0V (yellow-white)
Pri motion ra +020 Sec motion ra +000
Pri motion dec -033 Sec motion dec +000
Notes
rPM=1
This double is not physical.
 
 
18210-1939 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 168539 18 21 02 -19 39 28 BU 48 AB 2016 26 349 2.6 8.05 9.58 1.53 <===
Show 18 21 02 -19 39 28 BU 48 AC 2015 4 283 78.6 8.05 11.27 3.22
Show 18 20 56 -19 39 10 BU 48 CD 2016 7 57 16.4 11.27 11.26 0.01
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 168539 Constellation Sagittarius Tycho2 6273-01397-1 Gaia DR2 4094512964664066560
HD 168539 ADS 11268