The K2-240 system contains 2 exoplanets. It is located 237.80 light years away from the solar system.
| Mass | 0.58 solar masses |
| Radius | 0.54 solar radiae |
| Temperature | 3810 kelvin |
| Stellar Metallicity | -0.1 decimal exponent |
| Age | - billion years |
With a mass below 5 Earth masses, a density of 3.2, and a semi-major axis of 0.0513 astronomical units, K2-240 b could, potentially, be an ocean world - a planet with no dry land.
| Mass | 4.660 Earth masses |
| Density | 3.200 grams per cubic centimeter |
| Radius | 2.000 Earth radiae |
| Semi-major Axis | 0.0513 AU |
| Eccentricity | NaN |
| Orbital Period | 6.034 days |
| Discovery Method | Transit |
| Discovery Facility | K2 |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2018-10 |
| Reference | Díez Alonso et al. 2018 |
At 3.911 Earth masses, K2-240 c 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 | 3.890 Earth masses |
| Density | 3.670 grams per cubic centimeter |
| Radius | 1.800 Earth radiae |
| Semi-major Axis | 0.1159 AU |
| Eccentricity | NaN |
| Orbital Period | 20.523 days |
| Discovery Method | Transit |
| Discovery Facility | K2 |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2018-10 |
| Reference | Díez Alonso et al. 2018 |