The Kepler-256 system contains 4 exoplanets. It is located 3347.76 light years away from the solar system.
| Mass | 0.97 solar masses |
| Radius | 1.3 solar radiae |
| Temperature | 5551 kelvin |
| Stellar Metallicity | 0.12 decimal exponent |
| Age | 9.55 billion years |
At 3.158 Earth masses, Kepler-256 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 | 3.150 Earth masses |
| Density | 4.310 grams per cubic centimeter |
| Radius | 1.590 Earth radiae |
| Semi-major Axis | 0.027 AU |
| Eccentricity | 0 |
| Orbital Period | 1.620 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-256 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 | 5.270 Earth masses |
| Density | 2.910 grams per cubic centimeter |
| Radius | 2.150 Earth radiae |
| Semi-major Axis | 0.045 AU |
| Eccentricity | 0 |
| Orbital Period | 3.388 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-256 d 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 | 6.710 Earth masses |
| Density | 2.420 grams per cubic centimeter |
| Radius | 2.480 Earth radiae |
| Semi-major Axis | 0.064 AU |
| Eccentricity | 0 |
| Orbital Period | 5.839 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-256 e 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 | 0.096 AU |
| Eccentricity | 0 |
| Orbital Period | 10.682 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 |