18187-1206 SNA 90 AB

 
 
18h 18m 40.86s -12° 06' 23.3" P.A. 34.00 sep 3.0 mag 6.63,13.70 Sp O5IV+
 
 
Coord 2000 18187-1206 Discov num SNA  90 Comp AB Coord arcsec 2000 18 18 40.86 -12 06 23.3
Date first 2012 Date last 2012 Obs 1
Pa first 34 Pa last 33.8 P.A. Now (θ) 33.8°
Sep first 3.0 Sep last 3 Sep. Now (ρ) 3"
Mag pri 6.63 Mag sec 13.70 delta mag (ΔM) 7.07 Spectral class O5IV+ (blue)
Pri motion ra +001 Sec motion ra
Pri motion dec -002 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.
 
 
18187-1206 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 18 18 41 -12 06 23 SNA 90 Aa,Ab 2012 1 303 0.0 7.40 7.60 0.20
Show 18 18 41 -12 06 23 SNA 90 AB 2012 1 34 3.0 6.63 13.70 7.07 <===
Show 18 18 41 -12 06 23 SNA 90 AC 2012 1 267 7.6 6.63 14.00 7.37
Quadruple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Serpens Gaia DR2 4153666106124493696