08158-1027 RST 3578 AB

 
 
08h 15m 45.12s -10° 26' 54.4" P.A. 66.00 sep 0.1 mag 10.10,10.10 Sp K5V dist. 41.22 pc (134.46 l.y.)
 
 
Coord 2000 08158-1027 Discov num RST3578 Comp AB Coord arcsec 2000 08 15 45.12 -10 26 54.4
Date first 1938 Date last 2020 Obs 14
Pa first 275 Pa last 66.1 P.A. Now (θ) 82.5°
Sep first 0.3 Sep last 0.146 Sep. Now (ρ) 0.221"
Mag pri 10.10 Mag sec 10.10 delta mag (ΔM) 0 Spectral class K5V (yellow-orange)
Pri motion ra -062 Sec motion ra
Pri motion dec -050 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
08158-1027 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 154039 08 15 45 -10 26 54 RST 3578 AB 2020 14 66 0.1 10.10 10.10 0.00 Y <===
Show 154039 08 15 45 -10 26 54 SKF 427 AB,C 2015 9 142 26.7 9.30 15.00 5.70
Triple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Hydra SAO 154039 HIP 40465 Tycho2 5430-02287-1
Gaia DR2 5728453828366818816 HD 69247 BD BD-10 2443 Distance 41.22
Distance ly 134.46
 
 
ORBITAL ELEMENTS
 
 
Period (P)29.37y± 0.09 Periastron (T)2017.41y± 0.07 Semi-major axis (a)0.222a± 0.0043
Eccentricity (e)0.47± 0.019 Inclination (i)59.3°± 1.7 Longitude of periastron (ω)216.8°± 2.4
Node (Ω)93.3°± 1.1 Notes ReferenceTok2020e
Equinox Last observation Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 105.5 0.300
2001 108.6 0.295
2002 111.8 0.287
2003 115.2 0.276
2004 118.9 0.262
2005 123.1 0.246
2006 128.0 0.227
2007 133.8 0.206
2008 140.9 0.185
2009 150.0 0.163
2010 161.6 0.143
2011 176.6 0.127
2012 194.9 0.118
2013 214.8 0.117
2014 233.8 0.123
2015 250.7 0.130
2016 266.5 0.130
2017 284.5 0.113
2018 313.8 0.081
2019 7.3 0.070
2020 47.8 0.102
2021 66.0 0.146
2022 75.9 0.187
2023 82.5 0.221
2024 87.4 0.248
2025 91.5 0.269
2026 95.0 0.284
2027 98.3 0.294
2028 101.3 0.299
2029 104.4 0.300
2030 107.4 0.297


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



 
 


wds08158-1027b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic