18152-2023 CHR 255 Aa,Ab

18h 15m 12.97s -20° 23' 16.7" P.A. 156.00 sep 0.1 mag 6.50,6.90 Sp O9IV dist. 2325.58 pc (7586.04 l.y.)

Coord 2000 18152-2023 Discov num CHR 255 Comp Aa,Ab Coord arcsec 2000 18 15 12.97 -20 23 16.7
Date first 1996 Date last 2019 Obs 9
Pa first 140 Pa last 156.4 P.A. Now (θ) 156.4°
Sep first 0.1 Sep last 0.091 Sep. Now (ρ) 0.091"
Mag pri 6.50 Mag sec 6.90 delta mag (ΔM) 0.4 Spectral class O9IV (blue)
Pri motion ra +005 Sec motion ra
Pri motion dec -003 Sec motion dec
Notes N (See Notes)




Nature of this double is uncertain.



18152-2023 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 186544 18 15 13 -20 23 17 CHR 255 Aa,Ab 2019 9 156 0.1 6.50 6.90 0.40 <===
Show 186544 18 15 13 -20 23 17 BU 286 AB 2015 12 216 6.1 5.95 13.00 7.05
Show 16 Sgr 186544 18 15 13 -20 23 17 SNA 83 AC 2012 1 27 5.9 5.88 13.43 7.55
Show 186544 18 15 13 -20 23 17 SNA 83 AD 2012 1 281 6.5 5.88 13.04 7.16
Show 186544 18 15 13 -20 23 17 SNA 83 AE 2012 1 242 7.3 5.88 13.20 7.32


Sextuple system
5 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Constellation Sagittarius SAO 186544 HIP 89440 Tycho2 6272-00089-1
Gaia DR2 4094031138050641408 HD 167263 HR 6823 GC 24895
ADS 11191 BD BD-20 5055 Flamsteed 16 Sagittarii Flamsteed name 16 Sgr
Distance 2325.58 Distance ly 7586.04