Epsilon Reticuli b

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Epsilon Reticuli b
Exoplanet List of exoplanets
Orbital elements
Semi-major axis (a) 1.271 ± 0.073 AU
Eccentricity (e) 0.060 ± 0.043
Orbital period (P) 428.1 ± 1.1 d
Argument of
(ω) 216°
Time of periastron (T0) 2,451,963 ± 55 JD
Semi-amplitude (K) 32.2 ± 1.4 m/s
Physical characteristics
Mass (m) ≥1.56 ± 0.14 MJ
Discovery information
Discovery date Dec 16, 2000
Discoverer(s) Butler, Tinney,
Marcy et al.[1]
Discovery method Radial velocity
Discovery site Anglo-Australian
Discovery status Published[1]
Other designations
Epsilon Reticuli Ab

Epsilon Reticuli b, sometimes designated Epsilon Reticuli Ab to distinguish from the white dwarf companion of the primary star Epsilon Reticuli, also known as HD 27442, was discovered on December 16, 2000 by the Anglo-Australian Planet Search Team using the radial velocity method. The planet's mass is at least 56% greater than Jupiter mass, a more accurate estimate requiring its inclination to be known.

The planet orbits its parent star relatively close, and with more than twice the eccentricity of Earth's orbit. Based on its mass, it is almost certainly a gas giant.[1][2]


  1. ^ a b c Butler, R. P.; et al. (2001). "Two New Planets from the Anglo-Australian Planet Search". The Astrophysical Journal. 555 (1): 410–417. Bibcode:2001ApJ...555..410B. doi:10.1086/321467. 
  2. ^ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493Freely accessible. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. 

External links[edit]

Coordinates: Sky map 04h 16m 29.03s, −59° 18′ 07.76″