GJ 3779 b: A Close-In Planet Around a Cool Red Dwarf

GJ 3779 is an M4.0 V star, a small, cool red dwarf, located 44.8 light-years away. Its mass is 0.27 solar masses, its radius is 0.281 solar radii, and its temperature is 3320 K. Each of these values is smaller or cooler than the Sun's corresponding property.

The system has one known planet, GJ 3779 b, discovered in 2018 by the radial velocity method, which detects the wobble a planet's gravity induces in its star's motion. The planet's minimum mass is 8 Earth masses, larger than Earth's, and its orbital period is 3.02 days. That figure represents a lower bound on the planet's true mass, not a full mass estimate.