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HD 114729 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 114729</td></tr><tr> <td colspan="2">Constellation</td> <td>Centaurus</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>13h 12m 44.2575s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–31° 52′ 24.056″</td></tr><tr><td colspan="2">Distance</td><td>114.1 ly
(35.00 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G3V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>2.11±0.12 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.76 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>2.46 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.167±0.055</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1114±15 d
(3.050 y)</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>93±30°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,450,520±67 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>18.8±1.3 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>0.95±0.10 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>2003</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Butler, Marcy,
Vogt</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>Template:Country data United States</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

HD 114729 b is an extrasolar planet[1] approximately 114 light years away in the constellation of Centaurus. This planet is probably slightly less massive than Jupiter. It is an "eccentric Jupiter" meaning that it does not orbit very near the star like the famous 51 Pegasi b but further out and its orbit is very oval-shaped. The mean distance from the star is 2.11 AU, about twice the Earth's distance from the Sun. At periastron, the planet is only 1.43 AU from the star (comparable to the distance of Mars from the Sun), and at apoastron, the orbital distance is 2.72 AU (inner asteroid belt).[2]

References Edit

  1. (2003). Seven New Keck Planets Orbiting G and K Dwarfs. The Astrophysical Journal 582 (1): 455–466.
  2. (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.

External links Edit

Coordinates: Sky map 13h 12m 44.2575s, −31° 52′ 24.056″


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