09310-1544 BU 339 (HD 82339)

 
 
09h 30m 57.03s -15° 44' 19.6" P.A. 252.00 sep 1.3 mag 8.95,9.76 Sp F6/7V dist. 131.75 pc (429.77 l.y.)
 
 
Coord 2000 09310-1544 Discov num BU  339 Comp Coord arcsec 2000 09 30 57.03 -15 44 19.6
Date first 1875 Date last 2017 Obs 24
Pa first 220 Pa last 251.7 P.A. Now (θ) 251.7°
Sep first 1.1 Sep last 1.29 Sep. Now (ρ) 1.29"
Mag pri 8.95 Mag sec 9.76 delta mag (ΔM) 0.81 Spectral class F6/7V (yellow-white)
Pri motion ra -047 Sec motion ra -047
Pri motion dec +025 Sec motion dec +025
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 82339 Constellation Hydra HIP 46676 Tycho2 6030-00295-1
Gaia DR2 5688362851279032192 HD 82339 ADS 7409 BD BD-15 2821
Distance 131.75 Distance ly 429.77
 
 
ORBITAL ELEMENTS
 
 
Period (P)1111.1451y± 533.1715 Periastron (T)1819.7956y± 38.3097 Semi-major axis (a)2.98769a± 1.89105
Eccentricity (e)0.80636± 0.15908 Inclination (i)75.137°± 8.338 Longitude of periastron (ω)103.675°± 14.998
Node (Ω)23.148°± 14.232 Notes ReferenceIzm2019
Equinox Last observation2001 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 246.2 1.284
2001 246.5 1.282
2002 246.7 1.281
2003 247.0 1.279
2004 247.3 1.278
2005 247.5 1.276
2006 247.8 1.275
2007 248.1 1.273
2008 248.4 1.272
2009 248.6 1.271
2010 248.9 1.269
2011 249.2 1.268
2012 249.4 1.266
2013 249.7 1.265
2014 250.0 1.263
2015 250.3 1.262
2016 250.5 1.261
2017 250.8 1.259
2018 251.1 1.258
2019 251.4 1.256
2020 251.7 1.255
2021 251.9 1.254
2022 252.2 1.252
2023 252.5 1.251
2024 252.8 1.250
2025 253.1 1.248
2026 253.3 1.247
2027 253.6 1.246
2028 253.9 1.244
2029 254.2 1.243
2030 254.5 1.242


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


 
  


wds09310-1544a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic