The Kepler-331 system contains 3 exoplanets. It is located 1892.09 light years away from the solar system.
| Mass | 0.65 solar masses |
| Radius | 0.49 solar radiae |
| Temperature | 4347 kelvin |
| Stellar Metallicity | 0.118 decimal exponent |
| Age | 1.2 billion years |
At 3.975 Earth masses, Kepler-331 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 | 3.970 Earth masses |
| Density | 3.620 grams per cubic centimeter |
| Radius | 1.820 Earth radiae |
| Semi-major Axis | 0.065 AU |
| Eccentricity | 0 |
| Orbital Period | 8.457 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |
At 4.039 Earth masses, Kepler-331 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 | 4.040 Earth masses |
| Density | 3.560 grams per cubic centimeter |
| Radius | 1.840 Earth radiae |
| Semi-major Axis | 0.105 AU |
| Eccentricity | 0 |
| Orbital Period | 17.281 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |
At 3.339 Earth masses, Kepler-331 d 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 | 3.330 Earth masses |
| Density | 4.150 grams per cubic centimeter |
| Radius | 1.640 Earth radiae |
| Semi-major Axis | 0.159 AU |
| Eccentricity | 0 |
| Orbital Period | 32.134 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |