18168-1631 SNA  84AD

 
 
18h 16m 49.65s -16 31' 04.3" P.A. 261 sep 6.8 mag 7.35,13.07 Sp O6.5V dist. 649.35 pc (2118.18 l.y.)
 
 
Coord 2000
18168-1631
Discov num
SNA  84
Comp
AD
Coord arcsec 2000
18 16 49.65 -16 31 04.3
Date first
1999
Date last
2015
Obs
3
Pa first
258
Pa last
261
P.A. Now (θ)
261°
Sep first
6.9
Sep last
6.8
Sep. Now (ρ)
6.8"
Mag pri
7.35
Mag sec
13.07
delta mag (ΔM)
5.72
Spectral class
O6.5V (blue)
Pri motion ra
+001
Sec motion ra
Pri motion dec
-003
Sec motion dec
Notes
N K (See Notes, K-band or other infrared magnitudes)
Nature of this double is uncertain.
 
 
18168-1631 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 18168-1631 SNA 84 AB 2012 2012 1 117 5.1 7.35 12.94 5.59
Show 18168-1631 SNA 84 AC 1999 2015 3 199 5.5 7.35 10.62 3.27
Show 18168-1631 SNA 84 AD 1999 2015 3 261 6.8 7.35 13.07 5.72 <===
Quadruple system
4 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
260.6
Precise sep
6.797
Constellation
Sagittarius
SAO
161251
HIP
89584
Tycho2
6265-02178-1
Gaia DR2
96363078912
HD
167633
BD
BD-16 4786
Distance
649.35
Distance ly
2118.18
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18168-1631 SNA 84 AD 2012 1 259 6.8 7.35 13.07 O6.5V N K 181649.65-163104.3
18168-1631 SNA 84 AD 2015 3 261 6.8 7.35 13.07 O6.5V N K 181649.65-163104.3

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