03124-4425 JC 8 AB

03h 12m 25.68s -44° 25' 10.8" P.A. 90.00 sep 0.1 mag 6.42,7.36 Sp F7III+A0V dist. 42.5 pc (138.64 l.y.)

Coord 2000 03124-4425 Discov num JC    8 Comp AB Coord arcsec 2000 03 12 25.68 -44 25 10.8
Date first 1895 Date last 2021 Obs 125
Pa first 190 Pa last 90 P.A. Now (θ) 276.9°
Sep first 0.5 Sep last 0.096 Sep. Now (ρ) 0.064"
Mag pri 6.42 Mag sec 7.36 delta mag (ΔM) 0.94 Spectral class F7III+A0V (yellow-white/white)
Pri motion ra +092 Sec motion ra +092
Pri motion dec -006 Sec motion dec -006
Notes N O (See Notes, Orbital solution)




This double is physical.



03124-4425 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 216209 03 12 26 -44 25 11 JC 8 AB 2021 125 90 0.1 6.42 7.36 0.94 Y <===
Show HD 20121 216209 03 12 26 -44 25 11 HJ 3556 AB,C 2017 68 188 3.7 6.42 8.76 2.34


Triple system
4 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Constellation Eridanus SAO 216209 HIP 14913 Tycho2 7567-01177-1
Gaia DR2 4850405974392311168 HD 20121 HR 968 GC 3845
CD CD-44 1025 CP CP-44 338 FK5 2228 Distance 42.5
Distance ly 138.64




ORBITAL ELEMENTS

Period (P)45.2y Periastron (T)1977.5y Semi-major axis (a)0.41a
Eccentricity (e)0.9 Inclination (i)165° Longitude of periastron (ω)118°
Node (Ω)110° Notesn ReferenceSod1999
Equinox2000 Last observation Grade2(1=Definitive, 9=Indet.)

label theta rho
2000 171.3 0.758
2001 170.3 0.758
2002 169.3 0.756
2003 168.3 0.751
2004 167.3 0.745
2005 166.3 0.737
2006 165.2 0.727
2007 164.1 0.714
2008 163.0 0.700
2009 161.8 0.683
2010 160.6 0.664
2011 159.3 0.642
2012 157.9 0.618
2013 156.3 0.591
2014 154.6 0.560
2015 152.7 0.527
2016 150.5 0.489
2017 147.9 0.447
2018 144.8 0.399
2019 140.7 0.345
2020 134.9 0.282
2021 125.3 0.206
2022 101.2 0.110
2023 276.9 0.064
2024 225.5 0.166
2025 211.9 0.246
2026 204.7 0.312
2027 199.8 0.369
2028 196.2 0.419
2029 193.3 0.463
2030 190.8 0.503


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



 
 


wds03124-4425a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic