Gliese 581d is an exoplanet that is currently disputed due to inaccurate analysis caused by noise and stellar activity, and is considered disproven by the NASA Exoplanet Archive. This remains controversial, with one 2015 paper agreeing with the 2014 analysis and another disagreeing with it. A 2019 paper on planets orbiting nearby M-dwarfs lists GJ 581 d (although they designate it GJ 581 e). The planet's mass is thought to be 6.98 Earths and its radius, assuming an Earth-like composition, is thought to be 2.2R⊕, making it a super-Earth. Its orbital period is thought to be 66.87 days long, with a semi-major axis of 0.21847 AU, with an unconstrained eccentricity. Analysis suggests that it orbits within the star's habitable zone, where the temperatures are just right to support life.