Gliese 849 b

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Gliese 849 b
Extrasolar planet List of extrasolar planets
Parent star
Star Gliese 849
Constellation Aquarius
Right ascension (α) 22h 9m 40.3460s
Declination (δ) –4° 38′ 26.624″
Apparent magnitude (mV) 10.42
Distance 28.618 ± 0.7 ly
(8.774 ± 0.2 pc)
Spectral type M3.5V
Orbital elements
Semimajor axis (a) 2.35 AU
Periastron (q) 2.20 AU
Apastron (Q) 2.50 AU
Eccentricity (e) 0.06 ± 0.09
Orbital period (P) 1890 ± 130 d
(5.17 y)
Argument of
periastron
(ω) 351 ± 60°
Time of periastron (T0) 2411462 ± 550 JD
Semi-amplitude (K) 22 ± 4 m/s
Physical characteristics
Minimum mass (m sin i) 0.82 MJ
(260 M)
Discovery information
Discovery date August 2006
Discoverer(s) California and Carnegie Planet Search
Discovery method radial velocity
Discovery site W. M. Keck Observatory
 USA
Discovery status Published
Database references
Extrasolar Planets
Encyclopaedia
data
SIMBAD data

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.[1]

References[edit]

  1. ^ Butler, R. Paul et al. (2006). "A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ 849". The Astronomical Society of the Pacific 118: 1685–1689. arXiv:astro-ph/0610179. Bibcode:2006PASP..118.1685B. doi:10.1086/510500. 

External links[edit]

Coordinates: Sky map 22h 09m 40.3460s, −4° 38′ 26.624″