The Kepler-401 system contains 3 exoplanets. It is located 3149.23 light years away from the solar system.
| Mass | 1.17 solar masses |
| Radius | 1.33 solar radiae |
| Temperature | 6117 kelvin |
| Stellar Metallicity | 0.02 decimal exponent |
| Age | 3.55 billion years |
At 3.562 Earth masses, Kepler-401 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 | 3.570 Earth masses |
| Density | 3.920 grams per cubic centimeter |
| Radius | 1.710 Earth radiae |
| Semi-major Axis | 0.122 AU |
| Eccentricity | 0 |
| Orbital Period | 14.383 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-401 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 | 5.270 Earth masses |
| Density | 2.910 grams per cubic centimeter |
| Radius | 2.150 Earth radiae |
| Semi-major Axis | 0.269 AU |
| Eccentricity | 0 |
| Orbital Period | 47.318 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-401 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 | 5.770 Earth masses |
| Density | 2.710 grams per cubic centimeter |
| Radius | 2.270 Earth radiae |
| Semi-major Axis | 0.6503 AU |
| Eccentricity | 0 |
| Orbital Period | 184.256 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2016-05 |
| Reference | Morton et al. 2016 |