description HD 40307 c Overview
HD 40307 c is a super-Earth-mass exoplanet orbiting the K-type star HD 40307. It was announced in 2008 from radial-velocity observations and has an orbital period of approximately 9.6 days. The planet was part of the original set of three reported planets around the star, a system that helped establish the presence of multiple low-mass planets detected by the radial-velocity method. Its close orbit places it well inside the star's habitable zone.
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How good is HD 40307 c?
HD 40307 c scores 5.98/10 (Mediocre) on Lunoo, making it rated in the Exoplanet category.
What are the best alternatives to HD 40307 c?
See our alternatives page for HD 40307 c for a ranked list with scores. Top alternatives include: HD 192310 b, HD 40307 d, HD 40307 b.
How does HD 40307 c compare to HD 192310 b?
See our detailed comparison of HD 40307 c vs HD 192310 b with scores, features, and an AI-powered verdict.
Is HD 40307 c worth it in 2026?
With a score of 5.98/10, HD 40307 c is a solid option in Exoplanet. See all Exoplanet ranked.
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