The GJ 317 system contains 2 exoplanets. It is located 49.57 light years away from the solar system.
| Mass | 0.42 solar masses |
| Radius | 0.43 solar radiae |
| Temperature | 3492.73 kelvin |
| Stellar Metallicity | 0.301 decimal exponent |
| Age | 5 billion years |
At more than 50 Earth masses, GJ 317 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 794.500 Earth masses |
| Density | 1.860 grams per cubic centimeter |
| Radius | 13.300 Earth radiae |
| Semi-major Axis | 1.151 AU |
| Eccentricity | 0.07 |
| Orbital Period | 695.660 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2007-11 |
| Reference | Johnson et al. 2007 |
At more than 50 Earth masses, GJ 317 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 522.500 Earth masses |
| Density | 1.170 grams per cubic centimeter |
| Radius | 13.500 Earth radiae |
| Semi-major Axis | 5.23 AU |
| Eccentricity | 0.17 |
| Orbital Period | 6739.323 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | W. M. Keck Observatory |
| Discovery Telescope | 10 m Keck I Telescope |
| Discovery Instrument | HIRES Spectrometer |
| Discovery Date | 2016-04 |
| Reference | Bryan et al. 2016 |