The CoRoT-21 system contains 1 exoplanet. It is located 4562.38 light years away from the solar system.
| Mass | 1.29 solar masses |
| Radius | 1.95 solar radiae |
| Temperature | 6200 kelvin |
| Stellar Metallicity | 0 decimal exponent |
| Age | 4.1 billion years |
At more than 50 Earth masses, CoRoT-21 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 718.296 Earth masses |
| Density | 1.360 grams per cubic centimeter |
| Radius | 14.572 Earth radiae |
| Semi-major Axis | 0.0417 AU |
| Eccentricity | 0 |
| Orbital Period | 2.725 days |
| Discovery Method | Transit |
| Discovery Facility | CoRoT |
| Discovery Telescope | 0.27 m CoRoT Telescope |
| Discovery Instrument | CoRoT CCD Array |
| Discovery Date | 2012-09 |
| Reference | Pätzold et al. 2012 |