The GJ 143 system contains 2 exoplanets. It is located 53.23 light years away from the solar system.
| Mass | 0.73 solar masses |
| Radius | 0.7 solar radiae |
| Temperature | 4640 kelvin |
| Stellar Metallicity | 0.003 decimal exponent |
| Age | 3.8 billion years |
At more than 10 Earth masses, GJ 143 b 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 | 22.700 Earth masses |
| Density | 7.000 grams per cubic centimeter |
| Radius | 2.610 Earth radiae |
| Semi-major Axis | 0.1915 AU |
| Eccentricity | 0.188 |
| Orbital Period | 35.613 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 | 2019-02 |
| Reference | Trifonov et al. 2019 |
At 3.702 Earth masses, GJ 143 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 | 3.700 Earth masses |
| Density | 31.930 grams per cubic centimeter |
| Radius | 0.892 Earth radiae |
| Semi-major Axis | 0.0695 AU |
| Eccentricity | NaN |
| Orbital Period | 7.790 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 | 2019-04 |
| Reference | Dragomir et al. 2019 |