18020-2731 B  2850AC

 
 
18h 02m 02.85s -27 30' 53.4" P.A. 50 sep 5.8 mag 8.49,14.10 Sp B2V
 
 
Coord 2000
18020-2731
Discov num
B  2850
Comp
AC
Coord arcsec 2000
18 02 02.85 -27 30 53.4
Date first
1927
Date last
1999
Obs
3
Pa first
55
Pa last
50
P.A. Now (θ)
50°
Sep first
5.8
Sep last
5.8
Sep. Now (ρ)
5.8"
Mag pri
8.49
Mag sec
14.10
delta mag (ΔM)
5.61
Spectral class
B2V (blue-white)
Pri motion ra
-013
Sec motion ra
Pri motion dec
+035
Sec motion dec
Notes
Nature of this double is uncertain.
 
 
18020-2731 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18020-2731 STN 40 AB 1876 1999 19 161 2.4 8.49 9.31 0.82
Show 18020-2731 B 2850 AC 1927 1999 3 50 5.8 8.49 14.10 5.61 <===
Triple system
3 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
50.1
Precise sep
5.78
Constellation
Sagittarius
Tycho2
6850-02107-1
HD
164404
last precise pa
50.1
last precise sep
5.78
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18020-2731 B 2850 AC 1999 3 50 5.8 8.49 14.10 B2V D 180202.85-273053.4

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