The Kepler-203 system contains 3 exoplanets. It is located 2293.86 light years away from the solar system.
| Mass | 1 solar masses |
| Radius | 1.11 solar radiae |
| Temperature | 5821 kelvin |
| Stellar Metallicity | 0.048 decimal exponent |
| Age | 0.5 billion years |
At more than 10 Earth masses, Kepler-203 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 | 7.130 Earth masses |
| Density | 2.310 grams per cubic centimeter |
| Radius | 2.570 Earth radiae |
| Semi-major Axis | 0.043 AU |
| Eccentricity | 0 |
| Orbital Period | 3.163 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 50 Earth masses, Kepler-203 c is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 749.900 Earth masses |
| Density | 273.000 grams per cubic centimeter |
| Radius | 2.470 Earth radiae |
| Semi-major Axis | 0.061 AU |
| Eccentricity | 0 |
| Orbital Period | 5.371 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-203 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 | 33.900 Earth masses |
| Density | 62.400 grams per cubic centimeter |
| Radius | 1.440 Earth radiae |
| Semi-major Axis | 0.1 AU |
| Eccentricity | 0 |
| Orbital Period | 11.330 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 |