18242-1935 BU   49AD

 
 
18h 24m 09.30s -19 34' 37.4" P.A. 149 sep 23.7 mag 7.97,11.70 Sp B8III
 
 
Coord 2000
18242-1935
Discov num
BU   49
Comp
AD
Coord arcsec 2000
18 24 09.30 -19 34 37.4
Date first
1898
Date last
1999
Obs
6
Pa first
148
Pa last
149
P.A. Now (θ)
149°
Sep first
24.2
Sep last
23.7
Sep. Now (ρ)
23.7"
Mag pri
7.97
Mag sec
11.70
delta mag (ΔM)
3.73
Spectral class
B8III (blue-white)
Pri motion ra
+001
Sec motion ra
+002
Pri motion dec
-011
Sec motion dec
-009
Notes
rPM=0.202 (< 0.3, Physical double)
This double is 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
149.2
Precise sep
23.673
Constellation
Sagittarius
SAO
161426
Tycho2
6274-00524-1
HD
169174
last precise pa
149.2
last precise sep
23.673
 
 
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 AD 1998 5 149 23.4 7.97 11.70 B8III D 182409.30-193437.4
18242-1935 BU 49 AD 1999 6 149 23.7 7.97 11.70 B8III D 182409.30-193437.4

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