02396-1152 FIN 312 (Eps Cet)

 
 
02h 39m 33.83s -11° 52' 19.6" P.A. 239.00 sep 0.1 mag 5.22,6.50 Sp F5V+F5V dist. 21.48 pc (70.07 l.y.)
 
 
Coord 2000 02396-1152 Discov num FIN 312 Comp Coord arcsec 2000 02 39 33.83 -11 52 19.6
Date first 1951 Date last 2020 Obs 228
Pa first 238 Pa last 238.6 P.A. Now (θ) 238.6°
Sep first 0.1 Sep last 0.102 Sep. Now (ρ) 0.102"
Mag pri 5.22 Mag sec 6.50 delta mag (ΔM) 1.28 Spectral class F5V+F5V (yellow-white/yellow-white)
Pri motion ra +151 Sec motion ra
Pri motion dec -237 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name Eps Cet Constellation Cetus SAO 148528 HIP 12390
Tycho2 5288-01093-1 Gaia DR2 5171076479048181760 HD 16620 HR 781
GC 3199 GL Gl 105.4A BD BD-12 501 Bayer Epsilon Ceti
Bayer name Eps Cet Flamsteed 83 Ceti Flamsteed name 83 Cet Distance 21.48
Distance ly 70.07 Bayer greek ε Cet
 
 
ORBITAL ELEMENTS
 
 
Period (P)2.6512y± 0.0005 Periastron (T)2012.3109y± 0.0005 Semi-major axis (a)0.1063a± 0.0005
Eccentricity (e)0.23± 0.001 Inclination (i)24.2°± 0.2 Longitude of periastron (ω)40.8°± 0.2
Node (Ω)90.2°± 0.2 Notesn ReferenceDoc2013d
Equinox2000 Last observation2009 Grade1(1=Definitive, 9=Indet.)
label theta rho
2000 276.0 0.124
2001 11.4 0.104
2002 193.1 0.083
2003 305.7 0.126
2004 61.1 0.092
2005 246.1 0.109
2006 337.5 0.117
2007 126.6 0.079
2008 280.1 0.125
2009 17.3 0.103
2010 202.0 0.086
2011 309.7 0.126
2012 68.8 0.090
2013 251.3 0.112
2014 342.3 0.115
2015 136.8 0.078
2016 284.1 0.126
2017 23.4 0.101
2018 210.3 0.089
2019 313.7 0.125
2020 76.7 0.089
2021 256.2 0.115
2022 347.1 0.113
2023 147.3 0.077
2024 288.0 0.127
2025 29.8 0.099
2026 217.9 0.093
2027 317.8 0.124
2028 84.9 0.087
2029 260.9 0.117
2030 352.2 0.111


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



 
 


wds02396-1152a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic