The Kepler-255 system contains 3 exoplanets. It is located 3432.89 light years away from the solar system.
| Mass | 0.87 solar masses |
| Radius | 0.93 solar radiae |
| Temperature | 5573 kelvin |
| Stellar Metallicity | 0.339 decimal exponent |
| Age | 2.4 billion years |
At 3.024 Earth masses, Kepler-255 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 | 3.020 Earth masses |
| Density | 4.460 grams per cubic centimeter |
| Radius | 1.550 Earth radiae |
| Semi-major Axis | 0.063 AU |
| Eccentricity | 0 |
| Orbital Period | 5.715 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |
At more than 10 Earth masses, Kepler-255 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 | 9.220 Earth masses |
| Density | 1.900 grams per cubic centimeter |
| Radius | 2.990 Earth radiae |
| Semi-major Axis | 0.092 AU |
| Eccentricity | 0 |
| Orbital Period | 9.946 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-03 |
| Reference | Rowe et al. 2014 |
At 2.302 Earth masses, Kepler-255 d 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 | 2.300 Earth masses |
| Density | 5.500 grams per cubic centimeter |
| Radius | 1.320 Earth radiae |
| Semi-major Axis | 0.0192 AU |
| Eccentricity | 0 |
| Orbital Period | 1.046 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 |