The Kepler-421 system contains 1 exoplanet. It is located 1136.84 light years away from the solar system.
| Mass | 0.79 solar masses |
| Radius | 0.76 solar radiae |
| Temperature | 5308 kelvin |
| Stellar Metallicity | -0.25 decimal exponent |
| Age | 4 billion years |
At more than 10 Earth masses, Kepler-421 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 | 16.100 Earth masses |
| Density | 1.230 grams per cubic centimeter |
| Radius | 4.160 Earth radiae |
| Semi-major Axis | 1.219 AU |
| Eccentricity | 0.041 |
| Orbital Period | 704.198 days |
| Discovery Method | Transit |
| Discovery Facility | Kepler |
| Discovery Telescope | 0.95 m Kepler Telescope |
| Discovery Instrument | Kepler CCD Array |
| Discovery Date | 2014-07 |
| Reference | Kipping et al. 2014 |