The Kepler-209 system contains 2 exoplanets. It is located 1881.74 light years away from the solar system.
| Mass | 0.93 solar masses |
| Radius | 0.94 solar radiae |
| Temperature | 5513 kelvin |
| Stellar Metallicity | 0.11 decimal exponent |
| Age | 4.47 billion years |
At more than 10 Earth masses, Kepler-209 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 | 5.730 Earth masses |
| Density | 2.730 grams per cubic centimeter |
| Radius | 2.260 Earth radiae |
| Semi-major Axis | 0.122 AU |
| Eccentricity | 0 |
| Orbital Period | 16.088 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-209 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 | 9.800 Earth masses |
| Density | 1.810 grams per cubic centimeter |
| Radius | 3.100 Earth radiae |
| Semi-major Axis | 0.231 AU |
| Eccentricity | 0 |
| Orbital Period | 41.750 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 |