The Kepler-1221 system contains 1 exoplanet. It is located 2979.92 light years away from the solar system.
| Mass | 0.87 solar masses |
| Radius | 0.82 solar radiae |
| Temperature | 5194 kelvin |
| Stellar Metallicity | 0.09 decimal exponent |
| Age | 4.57 billion years |
With a mass below 5 Earth masses, a density of 3.47, and a semi-major axis of 0.0906 astronomical units, Kepler-1221 b could, potentially, be an ocean world - a planet with no dry land.
| Mass | 4.190 Earth masses |
| Density | 3.470 grams per cubic centimeter |
| Radius | 1.880 Earth radiae |
| Semi-major Axis | 0.0906 AU |
| Eccentricity | 0 |
| Orbital Period | 12.001 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 |