Epsilon Reticuli b
Extrasolar planet List of extrasolar planets
Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>1.271 ± 0.073 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.060 ± 0.043</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>428.1 ± 1.1 d</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>216°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,451,963 ± 55 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>32.2 ± 1.4 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>≥1.56 ± 0.14 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>Dec 16, 2000</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Butler, Tinney,
Marcy et al.[1]</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Anglo-Australian
</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[1]</td></tr>

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 highly successful 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. 1.0 1.1 1.2 (2001). Two New Planets from the Anglo-Australian Planet Search. The Astrophysical Journal 555 (1): 410–417.
  2. (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.

External linksEdit

Coordinates: Sky map 04h 16m 29.03s, −59° 18′ 07.76″ Template:Nearest bright star systemsde:Epsilon Reticuli Ab

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