18210-1939 BU   48AB

 
 
18H 21M 01.51S -19 39' 28.5" P.A. 351 SEP 2.8 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
2002
Obs
25
Pa first
10
Pa last
351
P.A. Now (θ)
351°
Sep first
2.8
Sep last
2.8
Sep. Now (ρ)
2.8"
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
Nature of this double is uncertain.
 
 
18210-1939 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18210-1939 BU 48 AB 1871 2002 25 351 2.8 8.05 9.58 1.53 <===
Show 18210-1939 BU 48 AC 1991 2000 4 283 78.3 8.05 11.27 3.22
Show 18210-1939 BU 48 CD 1991 2016 7 58 16.4 11.27 11.26 0.01
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Sagittarius
Tycho2
6273-01397-1
HD
168539
last precise pa
350.6
last precise sep
2.78