The K2-254 system contains 2 exoplanets. It is located 742.90 light years away from the solar system.
| Mass | 0.71 solar masses |
| Radius | 0.67 solar radiae |
| Temperature | 4629 kelvin |
| Stellar Metallicity | -0.14 decimal exponent |
| Age | - billion years |
At 3.307 Earth masses, K2-254 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 | 3.290 Earth masses |
| Density | 4.170 grams per cubic centimeter |
| Radius | 1.630 Earth radiae |
| Semi-major Axis | 0.0448 AU |
| Eccentricity | NaN |
| Orbital Period | 4.096 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 |
At more than 10 Earth masses, K2-254 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 | 5.430 Earth masses |
| Density | 2.840 grams per cubic centimeter |
| Radius | 2.190 Earth radiae |
| Semi-major Axis | 0.0923 AU |
| Eccentricity | NaN |
| Orbital Period | 12.118 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 |