18153-1900 BU  284AF

 
 
18H 15M 16.76S -18 59' 33.9" P.A. 267 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
2000
Obs
7
Pa first
269
Pa last
267
P.A. Now (θ)
267°
Sep first
138.9
Sep last
138.7
Sep. Now (ρ)
138.7"
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
Nature of this double is uncertain.
 
 
18153-1900 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 161217 18153-1900 BU 284 AB 1890 2000 11 359 17.8 7.09 11.50 4.41
Show 161217 18153-1900 BU 284 AC 1891 2000 10 86 31.2 7.09 12.20 5.11
Show 161217 18153-1900 BU 284 AD 1890 2003 10 192 58.3 7.09 9.70 2.61
Show 161217 18153-1900 BU 284 AE 1890 2003 11 180 76.0 7.09 10.34 3.25
Show 161217 18153-1900 BU 284 AF 1890 2000 7 267 138.7 7.09 9.50 2.41 <===
Show 161217 18153-1900 BU 284 AG 1891 2000 10 199 12.2 7.09 11.00 3.91
Show 161217 18153-1900 BU 284 AH 1891 2000 10 66 21.4 7.09 10.70 3.61
Show 161217 18153-1900 BU 284 AS 1898 2000 4 102 19.1 7.09 13.00 5.91
Show 161217 18153-1900 BU 284 BR 1891 2000 7 326 5.2 11.50 12.00 0.50
Show 18153-1900 ARA 743 CQ 1916 2000 6 299 13.1 12.20 12.70 0.50
11-fold system
11 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Sagittarius
SAO
161217
Tycho2
6272-00830-1
HD
167287
last precise pa
266.6
last precise sep
138.738