The K2-251 system contains 1 exoplanet. It is located 479.55 light years away from the solar system.
| Mass | 0.52 solar masses |
| Radius | 0.49 solar radiae |
| Temperature | 3717 kelvin |
| Stellar Metallicity | -0.04 decimal exponent |
| Age | - billion years |
At more than 10 Earth masses, K2-251 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 | 6.120 Earth masses |
| Density | 2.590 grams per cubic centimeter |
| Radius | 2.350 Earth radiae |
| Semi-major Axis | 0.0694 AU |
| Eccentricity | NaN |
| Orbital Period | 9.301 days |
| Discovery Method | Transit |
| Discovery Facility | K2 |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2018-08 |
| Reference | Livingston et al. 2018 |