The Kepler-857 system contains 1 exoplanet. It is located 3207.75 light years away from the solar system.
| Mass | 0.99 solar masses |
| Radius | 0.99 solar radiae |
| Temperature | 5773 kelvin |
| Stellar Metallicity | 0.02 decimal exponent |
| Age | 4.27 billion years |
At more than 10 Earth masses, Kepler-857 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 | 37.200 Earth masses |
| Density | 0.650 grams per cubic centimeter |
| Radius | 6.800 Earth radiae |
| Semi-major Axis | 0.3751 AU |
| Eccentricity | 0 |
| Orbital Period | 85.351 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 |