The GJ 1214 system contains 1 exoplanet. It is located 47.76 light years away from the solar system.
| Mass | 0.18 solar masses |
| Radius | 0.21 solar radiae |
| Temperature | 3250 kelvin |
| Stellar Metallicity | 0.29 decimal exponent |
| Age | 3 billion years |
At more than 10 Earth masses, GJ 1214 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 | 8.170 Earth masses |
| Density | 2.200 grams per cubic centimeter |
| Radius | 2.742 Earth radiae |
| Semi-major Axis | 0.0149 AU |
| Eccentricity | 0.063 |
| Orbital Period | 1.580 days |
| Discovery Method | Transit |
| Discovery Facility | MEarth Project |
| Discovery Telescope | 0.4 m MEarth Telescope |
| Discovery Instrument | Apogee CCD Sensor |
| Discovery Date | 2009-12 |
| Reference | Charbonneau et al. 2009 |