09128-6055 HDO 207AB

 
 
09H 12M 50.63S -60 55' 00.5" P.A. 288.8 SEP 0.13 MAG 6.97,7.27 SP B9V DIST. 173.31 PC (565.34 L.Y.)
 
 
Coord 2000
09128-6055
Discov num
HDO 207
Comp
AB
Coord arcsec 2000
09 12 50.63 -60 55 00.5
Date first
1915
Date last
2013
Obs
42
Pa first
53
Pa last
98
P.A. Now (θ)
288.8°
Sep first
0.3
Sep last
0.1
Sep. Now (ρ)
0.13"
Mag pri
6.97
Mag sec
7.27
delta mag (ΔM)
0.3
Spectral class
B9V (blue-white)
Pri motion ra
-022
Sec motion ra
Pri motion dec
+019
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
09128-6055 SYSTEM COMPONENTS
 
 
Show name SAO coord_2000 discov# comp first last obs pa sep mag1 mag2 d_mag orb current
Show 250485 09128-6055 CHR 144 Aa,Ab 1989 1989 1 35 0.0 6.50
Show 250485 09128-6055 HDO 207 AB 1915 2013 42 289 0.1 6.97 7.27 0.30 Y <===
Triple system
2 visible stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation
Carina
SAO
250485
HIP
45214
Tycho2
8940-02645-1
HD
79699
CP
CP-60 1353
Distance
173.31
Distance ly
565.34
last precise pa
97.9
last precise sep
0.139
 
 
ORBITAL ELEMENTS
 
 
Period (P)400y± 30 Periastron (T)1960.65y± 1.65 Semi-major axis (a)0.548a± 0.007
Eccentricity (e)0.538± 0.05 Inclination (i)76.4°± 1.5 Longitude of periastron (ω)149°± 5
Node (Ω)223.7°± 1.5 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2013
label rho theta
2000 0.195 70.7
2001 0.190 72.1
2002 0.185 73.7
2003 0.180 75.3
2004 0.176 77.0
2005 0.171 78.7
2006 0.167 80.6
2007 0.162 82.6
2008 0.158 84.7
2009 0.154 86.9
2010 0.150 89.2
2011 0.146 91.7
2012 0.143 94.2
2013 0.140 96.9
2014 0.137 99.7
2015 0.134 102.7
2016 0.132 105.7
2017 0.130 108.8
2018 0.128 112.1
2019 0.127 115.4
2020 0.126 118.8
2021 0.125 122.2
2022 0.125 125.6
2023 0.126 129.0
2024 0.126 132.4
2025 0.127 135.7
2026 0.129 139.0
2027 0.131 142.1
2028 0.133 145.2
2029 0.136 148.2
2030 0.139 151.0

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





grafico misure orbit6
Measures: green=micrometric, blue=interferometric, purple=photographic