79 Ceti b
Extrasolar planet List of extrasolar planets
An artist's conception of 79 Ceti b
Parent star

<tr> <td colspan="2">Star</td> <td>79 Ceti</td></tr><tr> <td colspan="2">Constellation</td> <td>Cetus</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>02h 35m 19.93s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>−03° 33′ 38.2″[1]</td></tr><tr><td colspan="2">Distance</td><td>127 ± 3[1] ly
(39 ± 1[1] pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G5IV</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.363±0.021 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.252±0.052</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>75.523±0.055 d</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>42±14°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,450,338.0±3.0 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>11.99±0.87 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>0.260±0.028 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>March 29, 2000</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Marcy et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Doppler Spectroscopy</td></tr><tr> <td colspan="2">Discovery site</td> <td>Calif., USA</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

79 Ceti b (also known as HD 16141 b) is an extrasolar planet orbiting its star every 75 days. With HD 46375 b on March 29, 2000, it was the joint first known extrasolar planet to have minimum mass less than the mass of Saturn.[2]

See alsoEdit


  1. 1.0 1.1 1.2 1.3 (2007). Validation of the new Hipparcos reduction. Astronomy and Astrophysics 474 (2): 653–664. Vizier catalog entry
  2. (2000). Sub-Saturn Planetary Candidates of HD 16141 and HD 46375. The Astrophysical Journal Letters 536 (1): L43–L46.

External linksEdit

Coordinates: Sky map 02h 35m 19.9283s, −03° 33′ 38.167″

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