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HD 68988 c
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 68988</td></tr><tr> <td colspan="2">Constellation</td> <td>Ursa Major</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>08h 18m 22.1731s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+61° 27′ 38.599″</td></tr><tr><td colspan="2">Distance</td><td>192 ly
(58.8 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>G0</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>5.32 AU</td></tr><tr> <td>Periastron</td> <td style="text-align: center">(q)</td> <td>5.27 AU</td></tr><tr> <td>Apastron</td> <td style="text-align: center">(Q)</td> <td>5.37 AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.01 ± 0.27</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>4100 ± 7300 d
(11 y)</td></tr><tr> <td>Orbital speed</td> <td style="text-align: center">(υ)</td> <td>14 km/s</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>129°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2452730 ± 510 JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>60 ± 11 m/s</td></tr>

Physical characteristics

<tr><td>Minimum mass</td><td style="text-align: center">(m sin i)</td><td>5.29 MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>November 2006</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Wright et al.</td></tr><tr> <td colspan="2">Discovery method</td> <td>Radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>California, US</td></tr><tr> <td colspan="2">Discovery status</td> <td>poorly constrained</td></tr>

HD 68988 c is an exoplanet located approximately 192 light-years away in the constellation of Ursa Major, orbiting the star HD 68988. The parameters including period and eccentricity are highly uncertain. The semimajor axis would be 5.32 AU with an orbital period of 4100 ± 7300 days (11 years).[1][2]

See alsoEdit

ReferencesEdit

  1. (2006). Catalog of Nearby Exoplanets. The Astrophysical Journal 646 (1): 505–522.
  2. (2007). Four New Exoplanets and Hints of Additional Substellar Companions to Exoplanet Host Stars. The Astrophysical Journal 657 (1): 533–545.

External linksEdit

Coordinates: Sky map 08h 18m 22.1731s, +61° 27′ 38.599″


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