Gliese 317 b

Gliese 317 b is an extrasolar planet^[1] approximately 50 light-years away in the constellation of Pyxis. The planet was reported in July 2007 to be orbiting the red dwarf star Gliese 317. The planet is a Jovian planet that orbits at about 95% of the distance between Earth and the Sun. The orbital period is about 1.9 years, corresponding to a slow orbital velocity of 14.82 km/s.

Gliese 317 b

Discovery
Discovered by	Johnson et al.
Discovery site	W. M. Keck, U.S.
Discovery date	6 July 2007
Detection method	Doppler spectroscopy
Orbital characteristics
Semi-major axis	0.95 AU (142,000,000 km)
Eccentricity	0.193 ± 0.06
Orbital period (sidereal)	692.9 ± 4 d 1.9 ± 1.1 y
Time of periastron	2451639 ± 30
Argument of periastron	344 ± 10
Semi-amplitude	57.3
Star	Gliese 317

See also

• Gliese 317 c
• Gliese 436 b