The Kepler-391 system contains 2 exoplanets. It is located 2835.07 light years away from the solar system.
| Mass | 1.03 solar masses |
| Radius | 3.57 solar radiae |
| Temperature | 4940 kelvin |
| Stellar Metallicity | -0.07 decimal exponent |
| Age | 5.7 billion years |
At more than 10 Earth masses, Kepler-391 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 | 10.300 Earth masses |
| Density | 1.730 grams per cubic centimeter |
| Radius | 3.200 Earth radiae |
| Semi-major Axis | 0.082 AU |
| Eccentricity | 0 |
| Orbital Period | 7.417 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 more than 10 Earth masses, Kepler-391 c 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 | 12.300 Earth masses |
| Density | 1.520 grams per cubic centimeter |
| Radius | 3.540 Earth radiae |
| Semi-major Axis | 0.161 AU |
| Eccentricity | 0 |
| Orbital Period | 20.485 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 |