The GJ 3021 system contains 1 exoplanet. It is located 57.26 light years away from the solar system.
| Mass | 0.9 solar masses |
| Radius | 0.9 solar radiae |
| Temperature | 5540 kelvin |
| Stellar Metallicity | 0.1 decimal exponent |
| Age | 0.37 billion years |
At more than 50 Earth masses, GJ 3021 b is a gas giant, a planet whose mass is mostly made up of hydrogen and helium, like Jupiter and Saturn.
| Mass | 1071.040 Earth masses |
| Density | 2.620 grams per cubic centimeter |
| Radius | 13.100 Earth radiae |
| Semi-major Axis | 0.49 AU |
| Eccentricity | 0.511 |
| Orbital Period | 133.710 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | La Silla Observatory |
| Discovery Telescope | 1.2 m Leonhard Euler Telescope |
| Discovery Instrument | CORALIE Spectrograph |
| Discovery Date | 2001-08 |
| Reference | Naef et al. 2001 |