Earth mass
In March 2014, a super-Neptune mass planet candidate was announced in a much closer-in orbit around GJ 229. Given the proximity to the Sun, the orbit of GJ 229Ab might be fully characterized by the Gaia space-astrometry mission or via direct imaging. In 2020, a super-Earth mass planet was discovered around GJ 229. GJ 229Ac orbits the star closer in than GJ 229Ab, it is located towards the outer edge but still well inside the star's habitable zone and in that sense quite similar to Mars in our own solar system.