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HD 108874 b
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>1.053 ± 0.061[2] AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0.128 ± 0.022[2]</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>394.48 ± 0.60[2] d</td></tr><tr> <td>Argument of
periastron
</td> <td style="text-align: center">(ω)</td> <td>219.4 ± 9.4[2]°</td></tr><tr> <td>Time of periastron</td> <td style="text-align: center">(T0)</td> <td>2,454,045 ± 49[2] JD</td></tr><tr> <td>Semi-amplitude</td> <td style="text-align: center">(K)</td> <td>37.3 ± 1.1[2] m/s</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>>1.34 ± 0.11[2] MJ</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>June 30, 2003</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Butler 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>Template:Country data United States</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published[3]</td></tr>

HD 108874 b is a gas giant announced in 2003.[3] The orbit lies in the star's habitable zone.[4] It is expected that any moons orbiting this planet are enriched in carbon, and are thus quite different from the silicate-rich bodies in our Solar System.[5] The planet is possibly in a 4 : 1 orbital resonance with HD 108874 c.[6]

See also Edit

ReferencesEdit

  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 (2003). Seven New Keck Planets Orbiting G and K Dwarfs. The Astrophysical Journal 582 (1): 455–466.
  4. Schwarz, R.; Dvorak, R.; Pilat Lohinger, E.; Süli, Á.; Érdi, B. (2007). Trojan planets in HD 108874?. Astronomy and Astrophysics 462 (3): 1165–1170.
  5. Template:Cite arxiv
  6. (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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