HD 66428 b
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 66428</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>08h 03m 28.6652s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>–01° 09′ 45.752″</td></tr><tr><td colspan="2">Distance</td><td>179 ± 12.4 ly
(55 ± 3.8 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G5</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>3.18 ± 0.19 AU
(476 Gm)</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>1.70 AU
(254 Gm)</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>4.66 AU
(697 Gm)</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.465 ± 0.03</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1973 ± 31 d
(5.402 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>17.6 km/s</td></tr><tr> <td>Argument of
</td> <td style="text-align: center">(ω)</td> <td>152.9 ± 3.9°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,412,139 ± 16 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>48.3 ± 2.7 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>2.82 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>July 15, 2006</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Butler 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>Template:Country data United States California</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[1]</td></tr>

HD 66428 b is a long-period jovian exoplanet located approximately 179.3 light-years away in the constellation of Monoceros. It has a mass of >2.82 MJ and takes 1973 days or 5.402 years to orbit around its solar-type star HD 66428. The average distance is 3.18 AU, about half the distance between Mars and Jupiter. This planet is a so-called eccentric Jupiter with an orbital eccentricity of 0.465. At periastron, the distance is 1.70 AU and at apastron, the distance is 4.66 AU.[1]

See alsoEdit


  1. 1.0 1.1 1.2 (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.

External linksEdit

Coordinates: Sky map 08h 03m 28.6652s, −01° 09′ 45.752″

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