description K2-229b Overview
K2-229b is a confirmed rocky exoplanet discovered from transits in data from NASA's K2 mission and announced in 2018. It is slightly larger than Earth but has a high measured density, consistent with a composition containing an unusually large iron core and often compared with Mercury's interior. The planet circles a K-type star once in about 14 hours, so its surface environment is expected to be extremely hot and is not considered Earth-like.
help K2-229b FAQ
How good is K2-229b?
K2-229b scores 6.44/10 (Fair) on Lunoo, making it rated in the Exoplanet category.
What are the best alternatives to K2-229b?
See our alternatives page for K2-229b for a ranked list with scores. Top alternatives include: 55 Cancri e, Kepler-78b, CoRoT-7b.
How does K2-229b compare to 55 Cancri e?
See our detailed comparison of K2-229b vs 55 Cancri e with scores, features, and an AI-powered verdict.
Is K2-229b worth it in 2026?
With a score of 6.44/10, K2-229b is a solid option in Exoplanet. See all Exoplanet ranked.
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