04584-0344 HDS 644 (HD 31768)

 
 
04h 58m 26.15s -03° 43' 58.8" P.A. 178.00 sep 0.7 mag 7.12,10.40 Sp F5 dist. 50.84 pc (165.84 l.y.)
 
 
Coord 2000 04584-0344 Discov num HDS 644 Comp Coord arcsec 2000 04 58 26.15 -03 43 58.8
Date first 1991 Date last 2021 Obs 29
Pa first 103 Pa last 178.3 P.A. Now (θ) 178.3°
Sep first 0.6 Sep last 0.699 Sep. Now (ρ) 0.699"
Mag pri 7.12 Mag sec 10.40 delta mag (ΔM) 3.28 Spectral class F5 (yellow-white)
Pri motion ra +078 Sec motion ra
Pri motion dec +048 Sec motion dec
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 31768 Constellation Orion SAO 131645 HIP 23116
Tycho2 4741-01620-1 Gaia DR2 3212750058416680320 HD 31768 GC 6067
BD BD-03 953 Distance 50.84 Distance ly 165.84
 
 
ORBITAL ELEMENTS
 
 
Period (P)127y Periastron (T)1944.9y Semi-major axis (a)0.743a
Eccentricity (e)0.3 Inclination (i)55.1° Longitude of periastron (ω)283.4°
Node (Ω)36.9° Notes ReferenceTok2019d
Equinox2000 Last observation2019 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 126.6 0.546
2001 129.5 0.548
2002 132.3 0.551
2003 135.1 0.554
2004 137.9 0.558
2005 140.6 0.562
2006 143.3 0.568
2007 145.9 0.573
2008 148.5 0.580
2009 151.0 0.586
2010 153.5 0.594
2011 155.9 0.601
2012 158.2 0.609
2013 160.5 0.618
2014 162.7 0.626
2015 164.8 0.635
2016 166.9 0.644
2017 168.9 0.653
2018 170.9 0.662
2019 172.8 0.671
2020 174.7 0.680
2021 176.5 0.689
2022 178.3 0.698
2023 180.0 0.706
2024 181.7 0.715
2025 183.4 0.723
2026 185.0 0.730
2027 186.6 0.737
2028 188.1 0.744
2029 189.7 0.751
2030 191.2 0.756


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



 
 


wds04584-0344a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic