09260+2839 A 222 (HD 81387)

 
 
09h 26m 02.33s +28° 39' 01.5" P.A. 4.00 sep 0.4 mag 9.13,9.41 Sp F8 dist. 111.61 pc (364.07 l.y.)
 
 
Coord 2000 09260+2839 Discov num A   222 Comp Coord arcsec 2000 09 26 02.33 +28 39 01.5
Date first 1901 Date last 2022 Obs 50
Pa first 326 Pa last 3.6 P.A. Now (θ) 0.3°
Sep first 0.2 Sep last 0.43 Sep. Now (ρ) 0.405"
Mag pri 9.13 Mag sec 9.41 delta mag (ΔM) 0.28 Spectral class F8 (yellow-white)
Pri motion ra -082 Sec motion ra
Pri motion dec -081 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 81387 Constellation Leo SAO 80830 HIP 46269
Tycho2 1958-01539-1 Gaia DR2 695443337956215552 HD 81387 ADS 7365
BD BD+29 1900 Distance 111.61 Distance ly 364.07
 
 
ORBITAL ELEMENTS
 
 
Period (P)155.08y Periastron (T)1963.43y Semi-major axis (a)0.32a
Eccentricity (e)0.367 Inclination (i)123.5° Longitude of periastron (ω)40.3°
Node (Ω)191.1° Notesn ReferenceHrt2014b
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 19.3 0.343
2001 18.3 0.349
2002 17.3 0.354
2003 16.4 0.359
2004 15.4 0.364
2005 14.5 0.369
2006 13.6 0.373
2007 12.8 0.377
2008 11.9 0.381
2009 11.1 0.385
2010 10.3 0.388
2011 9.5 0.391
2012 8.7 0.393
2013 7.9 0.396
2014 7.1 0.398
2015 6.3 0.399
2016 5.6 0.401
2017 4.8 0.402
2018 4.1 0.403
2019 3.3 0.404
2020 2.6 0.405
2021 1.8 0.405
2022 1.1 0.405
2023 0.3 0.405
2024 359.6 0.405
2025 358.9 0.404
2026 358.1 0.403
2027 357.4 0.402
2028 356.6 0.401
2029 355.8 0.400
2030 355.1 0.398


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



 
 


wds09260%2B2839b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic