09245+1808 A 2477 (HD 81163)

09h 24m 31.21s +18° 08' 29.1" P.A. 5.00 sep 0.5 mag 7.46,9.18 Sp K0IV dist. 170.36 pc (555.71 l.y.)

Coord 2000 09245+1808 Discov num A  2477 Comp Coord arcsec 2000 09 24 31.21 +18 08 29.1
Date first 1912 Date last 2016 Obs 72
Pa first 236 Pa last 4.9 P.A. Now (θ) 4.9°
Sep first 0.3 Sep last 0.456 Sep. Now (ρ) 0.456"
Mag pri 7.46 Mag sec 9.18 delta mag (ΔM) 1.72 Spectral class K0IV (yellow-orange)
Pri motion ra -032 Sec motion ra -032
Pri motion dec -033 Sec motion dec -033
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 81163 Constellation Leo SAO 98552 HIP 46137
Tycho2 1405-01091-1 Gaia DR2 632414044342607872 HD 81163 GC 12969
ADS 7341 BD BD+18 2182 Distance 170.36 Distance ly 555.71




ORBITAL ELEMENTS

Period (P)250y Periastron (T)2111.3y Semi-major axis (a)0.392a
Eccentricity (e)0.14 Inclination (i)38° Longitude of periastron (ω)313.3°
Node (Ω)195.7° Notes ReferenceFMR2014a
Equinox2000 Last observation2013 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 349.8 0.421
2001 350.8 0.422
2002 351.8 0.423
2003 352.7 0.424
2004 353.7 0.425
2005 354.6 0.426
2006 355.6 0.427
2007 356.5 0.427
2008 357.5 0.428
2009 358.4 0.429
2010 359.4 0.429
2011 0.3 0.430
2012 1.2 0.430
2013 2.2 0.430
2014 3.1 0.431
2015 4.0 0.431
2016 5.0 0.431
2017 5.9 0.431
2018 6.8 0.431
2019 7.8 0.430
2020 8.7 0.430
2021 9.6 0.430
2022 10.6 0.429
2023 11.5 0.429
2024 12.4 0.428
2025 13.4 0.427
2026 14.3 0.427
2027 15.3 0.426
2028 16.2 0.425
2029 17.2 0.423
2030 18.2 0.422


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



 
 


wds09245%2B1808a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic