Kepler-444 d — 0.5 times Earth's width, smaller than the Earth; its year lasts 6 days; about 510 °C, hotter than boiling water; found in 2015 by transit.
Kepler-444 e — 0.6 times Earth's width, smaller than the Earth; its year lasts 8 days; about 450 °C, hotter than boiling water; found in 2015 by transit.
Kepler-444 c — 0.5 times Earth's width, smaller than the Earth; its year lasts 5 days; about 600 °C, hotter than boiling water; found in 2015 by transit.
Kepler-444 b — 0.4 times Earth's width, smaller than the Earth; its year lasts 4 days; about 670 °C, hotter than boiling water; found in 2015 by transit.
Kepler-444 f — 0.7 times Earth's width, smaller than the Earth; its year lasts 10 days; about 400 °C, hotter than boiling water; found in 2015 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.