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 |
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Discov num |
FIN 312 |
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Comp |
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Coord arcsec 2000 |
02 39 33.83 -11 52 19.6 |
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Date first |
1951 |
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Date last |
2020 |
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Obs |
228 |
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Pa first |
238 |
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Pa last |
238.6 |
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P.A. Now (θ) |
238.6° |
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Sep first |
0.1 |
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Sep last |
0.102 |
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Sep. Now (ρ) |
0.102" |
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Mag pri |
5.22 |
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Mag sec |
6.50 |
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delta mag (ΔM) |
1.28 |
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Spectral class |
F5V+F5V (yellow-white/yellow-white) |
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Pri motion ra |
+151 |
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Sec motion ra |
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Pri motion dec |
-237 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
Eps Cet |
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Constellation |
Cetus |
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SAO |
148528 |
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HIP |
12390 |
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Tycho2 |
5288-01093-1 |
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Gaia DR2 |
5171076479048181760 |
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HD |
16620 |
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HR |
781 |
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GC |
3199 |
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GL |
Gl 105.4A |
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BD |
BD-12 501 |
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Bayer |
Epsilon Ceti |
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Bayer name |
Eps Cet |
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Flamsteed |
83 Ceti |
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Flamsteed name |
83 Cet |
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Distance |
21.48 |
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Distance ly |
70.07 |
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Bayer greek |
ε Cet |
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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 |
Notes | n | |
Reference | Doc2013d | |
Equinox | 2000 | |
Last observation | 2009 | |
Grade | 1 | (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 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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