Wolf 1061 b — 1.2 times Earth's width (estimated from its mass, not measured), about Earth-sized — probably rocky; its year lasts 5 days; about 190 °C, hotter than boiling water; found in 2015 by radial velocity.
Wolf 1061 c — 1.7 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 18 days; about 26 °C, between freezing and boiling; found in 2015 by radial velocity.
Wolf 1061 d — 2.7 times Earth's width (estimated from its mass, not measured), a 'sub-Neptune' — bigger than Earth, smaller than Neptune; its year lasts 220 days; about −140 °C, below freezing; found in 2015 by radial velocity.
NASA Exoplanet Archive, Planetary Systems Composite Parameters (fetched 2026-11-02). Composite values: where a planet's size or mass was not measured, the archive estimates it from the other.
This research has made use of the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.