18242-1935 BU   49AB

 
 
18h 24m 09.30s -19 34' 37.4" P.A. 46 sep 8.1 mag 7.97,11.30 Sp B8III
 
 
Coord 2000
18242-1935
Discov num
BU   49
Comp
AB
Coord arcsec 2000
18 24 09.30 -19 34 37.4
Date first
1871
Date last
1999
Obs
18
Pa first
40
Pa last
46
P.A. Now (θ)
46°
Sep first
7.0
Sep last
8.1
Sep. Now (ρ)
8.1"
Mag pri
7.97
Mag sec
11.30
delta mag (ΔM)
3.33
Spectral class
B8III (blue-white)
Pri motion ra
+001
Sec motion ra
+010
Pri motion dec
-011
Sec motion dec
+001
Notes
rPM=1.358
This double is not physical.
 
 
18242-1935 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 161426 18242-1935 BU 49 AB 1871 1999 18 46 8.1 7.97 11.30 3.33 <===
Show 161426 18242-1935 BU 49 AC 1898 1999 5 303 22.2 7.97 12.50 4.53
Show 161426 18242-1935 BU 49 AD 1898 1999 6 149 23.7 7.97 11.70 3.73
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
46.3
Precise sep
8.111
Constellation
Sagittarius
SAO
161426
Tycho2
6274-00524-1
HD
169174
last precise pa
46.3
last precise sep
8.111
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18242-1935 BU 49 AB 1998 17 45 8.2 7.97 11.30 B8III D 182409.30-193437.4
18242-1935 BU 49 AB 1999 18 46 8.1 7.97 11.30 B8III D 182409.30-193437.4

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