The Kepler-31 system contains 3 exoplanets. It is located 5429.32 light years away from the solar system.
| Mass | 1.21 solar masses |
| Radius | 1.22 solar radiae |
| Temperature | 6340 kelvin |
| Stellar Metallicity | -0.076 decimal exponent |
| Age | 0.28 billion years |
At more than 10 Earth masses, Kepler-31 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 | 25.900 Earth masses |
| Density | 0.855 grams per cubic centimeter |
| Radius | 5.500 Earth radiae |
| Semi-major Axis | 0.16 AU |
| Eccentricity | 0 |
| Orbital Period | 20.861 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2012-05 |
| Reference | Fabrycky et al. 2012 |
At more than 50 Earth masses, Kepler-31 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 1493.700 Earth masses |
| Density | NaN grams per cubic centimeter |
| Radius | 5.300 Earth radiae |
| Semi-major Axis | 0.26 AU |
| Eccentricity | 0 |
| Orbital Period | 42.632 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2012-05 |
| Reference | Fabrycky et al. 2012 |
At more than 50 Earth masses, Kepler-31 d is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 2161.244 Earth masses |
| Density | NaN grams per cubic centimeter |
| Radius | 3.900 Earth radiae |
| Semi-major Axis | 0.4 AU |
| Eccentricity | 0 |
| Orbital Period | 87.645 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 |