18152-2023 CHR 255Aa,Ab

 
 
18h 15m 12.97s -20 23' 16.7" P.A. 156 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
2014
Obs
7
Pa first
140
Pa last
156
P.A. Now (θ)
156°
Sep first
0.1
Sep last
0.1
Sep. Now (ρ)
0.1"
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_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 186544 18152-2023 CHR 255 Aa,Ab 1996 2014 7 156 0.1 6.50 6.90 0.40 <===
Show 16 Sgr 186544 18152-2023 BU 286 AB 1874 2012 11 215 6.1 5.95 13.00 7.05
Show 186544 18152-2023 SNA 83 AC 2012 2012 1 27 5.9 5.88 13.43 7.55
Show 186544 18152-2023 SNA 83 AD 2012 2012 1 281 6.5 5.88 13.04 7.16
Show 186544 18152-2023 SNA 83 AE 2012 2012 1 242 7.3 5.88 13.20 7.32
Sextuple system
5 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
155.8
Precise sep
0.082
Constellation
Sagittarius
SAO
186544
HIP
89440
HD
167263
HR
6823
GC
24895
BD
BD-20 5055
Flamsteed
16 Sagittarii
Flamsteed name
16 Sgr
Distance
2325.58
Distance ly
7586.04
last precise pa
155.8
last precise sep
0.082
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
18152-2023 CHR 255 Aa,Ab 2006 2 150 0.1 5.95   O9IV N 181512.97-202316.7
18152-2023 CHR 255 Aa,Ab 2013 6 156 0.1 5.95   O9IV N 181512.97-202316.7
18152-2023 CHR 255 Aa,Ab 2014 7 156 0.1 6.50 6.90 O9IV N 181512.97-202316.7

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