HD 52265 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 52265</td></tr><tr> <td colspan="2">Constellation</td> <td>Monoceros</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>07h 00m 18.0363s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–05° 22′ 01.783″</td></tr><tr><td colspan="2">Distance</td><td>91.50 ly
(28.07 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G0V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.504±0.029 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>0.340 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>0.668 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.325±0.065</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>119.290±0.086 d
(0.326593 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>46.1 km/s</td></tr><tr> <td>Inclination</td> <td style="text-align: center">(i)</td> <td>36°</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>243±15°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,450,833.7±4.2 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>42.1±3.1 m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>1.85 (assuming the planet is aligned to equator) MJ</td></tr><tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>1.09±0.11 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>22 April 2000</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Butler, Vogt,
Marcy et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Other detection methods</td> <td>Astroseismology</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 52265 b is a gas giant exoplanet located approximately 92 light-years away in the constellation of Monoceros, orbiting the star HD 52265. The planet has a minimum mass slightly more than that of Jupiter. Mean distance between the planet and the star is half that of Earth from the Sun.[1] It was discovered by both the California and Carnegie Planet Search team and the Geneva Extrasolar Planet Search team independently of each other.[2][3] By studying the fluctuations of the brightness of a host star, the inclination of the planet was determined. This allowed to calculate its true mass, assuming that the planet is inclined to star's equator. [4]


  1. (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.
  2. (2000). Planetary Companions to the Metal-rich Stars BD -10°3166 and HD 52265. The Astrophysical Journal 545 (1): 504–511.
  3. (2001). The CORALIE survey for southern extrasolar planets V. 3 new extrasolar planets. Astronomy and Astrophysics 375 (1): 205–218.
  4. Wobbly, Sunlike Star Being Pulled by Giant Alien Planet, Charles Q. Choi

External linksEdit

Coordinates: Sky map 07h 00m 18.0363s, −05° 22′ 01.783″

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