09128-6055 HDO 207 AB

 
 
09h 12m 50.63s -60° 55' 00.5" P.A. 124.00 sep 0.1 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 2021 Obs 46
Pa first 53 Pa last 124.2 P.A. Now (θ) 124.2°
Sep first 0.3 Sep last 0.123 Sep. Now (ρ) 0.123"
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 wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 79699 250485 09 12 51 -60 55 00 CHR 144 Aa,Ab 1989 1 35 0.0 6.50
Show 250485 09 12 51 -60 55 00 HDO 207 AB 2021 46 124 0.1 6.97 7.27 0.30 Y <===
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Carina SAO 250485 HIP 45214 Tycho2 8940-02645-1
Gaia DR2 5299769848327101184 HD 79699 GC 12739 CP CP-60 1353
Distance 173.31 Distance ly 565.34
 
 
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 Notesn ReferenceDoc2016d
Equinox2000 Last observation2013 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 70.7 0.195
2001 72.1 0.190
2002 73.7 0.185
2003 75.3 0.180
2004 77.0 0.176
2005 78.7 0.171
2006 80.6 0.167
2007 82.6 0.162
2008 84.7 0.158
2009 86.9 0.154
2010 89.2 0.150
2011 91.7 0.146
2012 94.2 0.143
2013 96.9 0.140
2014 99.7 0.137
2015 102.7 0.134
2016 105.7 0.132
2017 108.8 0.130
2018 112.1 0.128
2019 115.4 0.127
2020 118.8 0.126
2021 122.2 0.125
2022 125.6 0.125
2023 129.0 0.126
2024 132.4 0.126
2025 135.7 0.127
2026 139.0 0.129
2027 142.1 0.131
2028 145.2 0.133
2029 148.2 0.136
2030 151.0 0.139


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



 
 


wds09128-6055b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic