Gliese 849 b

Gliese 849 b

Exoplanet		List of exoplanets
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
Semi-major 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
Exoplanet Archive		data
Open Exoplanet Catalogue		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.