KOI-55 c — 0.9 times Earth's width, about Earth-sized — probably rocky; its year lasts 8 hours; about 6,600 °C, hot enough to melt rock; found in 2011 by orbital brightness modulation.
KOI-55 b — 0.8 times Earth's width, smaller than the Earth; its year lasts 6 hours; about 7,500 °C, hot enough to melt rock; found in 2011 by orbital brightness modulation.
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.