The GJ 3942 system contains 1 exoplanet. It is located 55.21 light years away from the solar system.
| Mass | 0.63 solar masses |
| Radius | 0.61 solar radiae |
| Temperature | 3867 kelvin |
| Stellar Metallicity | -0.04 decimal exponent |
| Age | - billion years |
At more than 10 Earth masses, GJ 3942 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 | 7.140 Earth masses |
| Density | 2.310 grams per cubic centimeter |
| Radius | 2.570 Earth radiae |
| Semi-major Axis | 0.0608 AU |
| Eccentricity | 0.121 |
| Orbital Period | 6.905 days |
| Discovery Method | Radial Velocity |
| Discovery Facility | Roque de los Muchachos Observatory |
| Discovery Telescope | 3.58 m Telescopio Nazionale Galileo |
| Discovery Instrument | HARPS-N Spectrograph |
| Discovery Date | 2017-12 |
| Reference | Perger et al. 2017 |