18168-1631 SNA 84 AD

18h 16m 49.65s -16° 31' 04.3" P.A. 261.00 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 260.6 P.A. Now (θ) 260.6°
Sep first 6.9 Sep last 6.797 Sep. Now (ρ) 6.797"
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)


Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes

Nature of this double is uncertain.



18168-1631 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 161251 18 16 50 -16 31 04 SNA 84 AB 2012 1 117 5.1 7.35 12.94 5.59
Show HD 167633 161251 18 16 50 -16 31 04 SNA 84 AC 2015 3 199 5.5 7.35 10.62 3.27
Show 161251 18 16 50 -16 31 04 SNA 84 AD 2015 3 261 6.8 7.35 13.07 5.72 <===


Quadruple system
4 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Constellation Sagittarius SAO 161251 HIP 89584 Tycho2 6265-02178-1
Gaia DR2 4097600496363078912 HD 167633 BD BD-16 4786 Distance 649.35
Distance ly 2118.18