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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.

Epsilon Reticuli b
Discovery
Discovered byButler, Tinney,
Marcy et al.[1]
Discovery siteAnglo-Australian
Observatory
Discovery dateDec 16, 2000
Detection method
Radial velocity
Orbital characteristics
Semi-major axis
1.271 ± 0.073 AU (190,100,000 ± 10,900,000 km)
Eccentricity0.060 ± 0.043
Orbital period (sidereal)
428.1 ± 1.1 d
Time of periastron
2,451,963 ± 55
Argument of periastron
216
Semi-amplitude32.2 ± 1.4
Physical characteristics
Mass≥1.56 ± 0.14 MJ

    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]


    References


    1. 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. hdl:2299/137.
    2. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.




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