The K2-321 system contains 1 exoplanet. It is located 253.39 light years away from the solar system.
| Mass | 0.6 solar masses |
| Radius | 0.58 solar radiae |
| Temperature | 3855 kelvin |
| Stellar Metallicity | - decimal exponent |
| Age | - billion years |
With a mass below 5 Earth masses, a density of 3.31, and a semi-major axis of 0.041 astronomical units, K2-321 b could, potentially, be an ocean world - a planet with no dry land.
| Mass | 4.460 Earth masses |
| Density | 3.310 grams per cubic centimeter |
| Radius | 1.950 Earth radiae |
| Semi-major Axis | 0.041 AU |
| Eccentricity | NaN |
| Orbital Period | 2.298 days |
| Discovery Method | Transit |
| Discovery Facility | K2 |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2020-12 |
| Reference | Castro González et al. 2020 |