Gliese 849 b (original) (raw)

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Jovian planet orbiting Gliese 849

Gliese 849 b

Discovery
Discovered by California and Carnegie Planet Search
Discovery site W. M. Keck Observatory USA
Discovery date August 2006
Detection method radial velocity
Orbital characteristics
Semi-major axis 2.39±0.082 AU
Eccentricity 0.038±0.019[1]
Orbital period (sidereal) 1924±15[1] d
Time of periastron 2453770±150[1]
Argument of periastron 66±28[1]
Semi-amplitude 23.96±0.94[1]
Star Gliese 849

Gliese 849 b is an extrasolar planet approximately 29 light years away in the constellation of Aquarius. It is the first long-period Jupiter-like planet discovered around a red dwarf, announced in August 2006 by the California and Carnegie Planet Search team using the radial velocity technique. The previously longest-period Jupiter-like planet around a red dwarf was Gliese 876 b. There are, however, two disproven longer period Jupiter-like planets around Lalande 21185. There are indications of a possible second companion. The planet's mass is less than that of Jupiter, though only the minimum mass is known. The distance of the planet is 2.35 AU and it takes 5.17 years (1890 days) to revolve in a circular orbit.[2]

  1. ^ a b c d e Feng, Y. Katherina; et al. (2015). "The California Planet Survey IV: A Planet Orbiting the Giant Star HD 145934 and Updates to Seven Systems with Long-period Planets". The Astrophysical Journal. 800 (1). 22. arXiv:1501.00633. Bibcode:2015ApJ...800...22F. doi:10.1088/0004-637X/800/1/22. S2CID 56390823.
  2. ^ Butler, R. Paul; et al. (2006). "A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ 849". Publications of the Astronomical Society of the Pacific. 118 (850): 1685–1689. arXiv:astro-ph/0610179. Bibcode:2006PASP..118.1685B. doi:10.1086/510500. S2CID 14787596.