Kepler-220 c — 1.6 times Earth's width, about Earth-sized — probably rocky; its year lasts 9 days; about 310 °C, hotter than boiling water; found in 2014 by transit.
Kepler-220 e — 1.3 times Earth's width, about Earth-sized — probably rocky; its year lasts 46 days; about 68 °C, between freezing and boiling; found in 2014 by transit.
Kepler-220 b — 0.8 times Earth's width, about Earth-sized — probably rocky; its year lasts 4 days; about 490 °C, hotter than boiling water; found in 2014 by transit.
Kepler-220 d — 1 times Earth's width, about Earth-sized — probably rocky; its year lasts 28 days; about 130 °C, hotter than boiling water; found in 2014 by transit.
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.