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