The GJ 357 system contains 3 exoplanets. It is located 30.80 light years away from the solar system.
| Mass | 0.34 solar masses |
| Radius | 0.34 solar radiae |
| Temperature | 3505 kelvin |
| Stellar Metallicity | -0.12 decimal exponent |
| Age | - billion years |
At 1.841 Earth masses, GJ 357 b is a so called Super Earth. Super Earths could be terrestrial worlds like Earth, but they could also be ocean worlds or terrestrial worlds wrapped in a substantial atmosphere, in which case some refer to them as Mini Neptunes.
| Mass | 1.840 Earth masses |
| Density | 5.600 grams per cubic centimeter |
| Radius | 1.217 Earth radiae |
| Semi-major Axis | 0.035 AU |
| Eccentricity | NaN |
| Orbital Period | 3.931 days |
| Discovery Method | Transit |
| Discovery Facility | Transiting Exoplanet Survey Satellite (TESS) |
| Discovery Telescope | 0.1 m TESS Telescope |
| Discovery Instrument | TESS CCD Array |
| Discovery Date | 2019-08 |
| Reference | Luque et al. 2019 |
At 3.403 Earth masses, GJ 357 c is a so called Super Earth. Super Earths could be terrestrial worlds like Earth, but they could also be ocean worlds or terrestrial worlds wrapped in a substantial atmosphere, in which case some refer to them as Mini Neptunes.
| Mass | 3.400 Earth masses |
| Density | 4.080 grams per cubic centimeter |
| Radius | 1.660 Earth radiae |
| Semi-major Axis | 0.061 AU |
| Eccentricity | NaN |
| Orbital Period | 9.125 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2019-08 |
| Reference | Luque et al. 2019 |
At more than 10 Earth masses, GJ 357 d is an ice giant, a planet that is made up mostly of volatiles like water, amonia and methane, and enveloped by a dense hydrogen and helium atmosphere, much like Uranus and Neptune.
| Mass | 6.100 Earth masses |
| Density | 2.620 grams per cubic centimeter |
| Radius | 2.340 Earth radiae |
| Semi-major Axis | 0.204 AU |
| Eccentricity | NaN |
| Orbital Period | 55.661 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Multiple Observatories |
| Discovery Telescope | Multiple Telescopes |
| Discovery Instrument | Multiple Instruments |
| Discovery Date | 2019-08 |
| Reference | Luque et al. 2019 |