12179-5559 BYV 1

 
 
12h 17m 53.19s -55° 58' 31.8" P.A. 307.00 sep 7.1 mag 7.81,13.00 Sp F5V+L2.5 dist. 92.08 pc (300.36 l.y.)
 
 
Coord 2000 12179-5559 Discov num BYV   1 Comp Coord arcsec 2000 12 17 53.19 -55 58 31.8
Date first 2004 Date last 2018 Obs 12
Pa first 307 Pa last 307.3 P.A. Now (θ) 307.3°
Sep first 7.1 Sep last 7.113 Sep. Now (ρ) 7.113"
Mag pri 7.81 Mag sec 13.00 delta mag (ΔM) 5.19 Spectral class F5V+L2.5 (yellow-white/very deep red)
Pri motion ra -039 Sec motion ra -039
Pri motion dec -012 Sec motion dec -012
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Crux SAO 239819 HIP 59960 Tycho2 8637-02434-1
Gaia DR2 6072902994276659200 HD 106906 CP CP-55 4978 Distance 92.08
Distance ly 300.36
 
 
ORBITAL ELEMENTS
 
 
Period (P)15000y± 17000 Periastron (T)3200y± 7800 Semi-major axis (a)8225.45m± 5419.12
Eccentricity (e)0.44± 0.31 Inclination (i)56°± 21 Longitude of periastron (ω)356°± 86
Node (Ω)99°± 28 Notesn ReferenceNgu2021
Equinox Last observation2018 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 35.8 3.481
2001 35.9 3.481
2002 36.0 3.482
2003 36.0 3.482
2004 36.1 3.482
2005 36.2 3.483
2006 36.2 3.483
2007 36.3 3.484
2008 36.4 3.484
2009 36.4 3.484
2010 36.5 3.485
2011 36.6 3.485
2012 36.6 3.486
2013 36.7 3.486
2014 36.8 3.486
2015 36.8 3.487
2016 36.9 3.487
2017 37.0 3.488
2018 37.0 3.488
2019 37.1 3.488
2020 37.2 3.489
2021 37.2 3.489
2022 37.3 3.490
2023 37.4 3.490
2024 37.4 3.491
2025 37.5 3.491
2026 37.6 3.491
2027 37.6 3.492
2028 37.7 3.492
2029 37.8 3.493
2030 37.8 3.493


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



 
 


wds12179-5559a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic