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HD 108874 c
Extrasolar planet List of extrasolar planets
Parent star

<tr> <td colspan="2">Star</td> <td>HD 108874</td></tr><tr> <td colspan="2">Constellation</td> <td>Coma Berenices</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>12h 30m 26.882s[1]</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+22° 52′ 47.38″[1]</td></tr><tr><td colspan="2">Distance</td><td>200 ± 10[1] ly
(63 ± 4[1] 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>2.77 ± 0.16[2] AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.273 ± 0.040[2]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>1680 ± 24[2] d</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>10 ± 11[2]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,452,797 ± 49[2] JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>18.90 ± 0.72[2] m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>1.064 ± 0.099[2] MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>June 24, 2005</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Vogt et al.[3]</td></tr><tr> <td colspan="2">Discovery method</td> <td>radial velocity</td></tr><tr> <td colspan="2">Discovery site</td> <td>California, USA</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[3]</td></tr>

HD 108874 c is a gas giant discovered in 2005 which orbits beyond the star's habitable zone, and receives insolation 15.9% that of Earth. It has minimum mass similar to Jupiter, although since the inclination of the orbit is not known the true mass of this planet could be much greater. The planet is possibly in a 4 : 1 orbital resonance with HD 108874 b.[3]

See also Edit

References Edit

  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. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 (2009). Ten New and Updated Multi-planet Systems, and a Survey of Exoplanetary Systems. The Astrophysical Journal 693 (2): 1084–1099.
  3. 3.0 3.1 3.2 (2005). Five New Multicomponent Planetary Systems. The Astrophysical Journal 632 (1): 638–658.

External links Edit

Coordinates: Sky map 12h 30m 26.8829s, +22° 52′ 47.383″


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