description HD 128311 c Overview
HD 128311 c is a gas-giant exoplanet orbiting the K-type star HD 128311, located roughly 53 light-years from Earth. The planet was announced in 2005 from radial-velocity observations. It is the outer member of a known two-planet system, and its orbital period is close to twice that of HD 128311 b, producing a relationship described as a 2:1 mean-motion resonance.
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How good is HD 128311 c?
HD 128311 c scores 5.98/10 (Mediocre) on Lunoo, making it rated in the Exoplanet category.
What are the best alternatives to HD 128311 c?
See our alternatives page for HD 128311 c for a ranked list with scores. Top alternatives include: Epsilon Eridani b, Mu Arae b, 55 Cancri d.
How does HD 128311 c compare to Epsilon Eridani b?
See our detailed comparison of HD 128311 c vs Epsilon Eridani b with scores, features, and an AI-powered verdict.
Is HD 128311 c worth it in 2026?
With a score of 5.98/10, HD 128311 c is a solid option in Exoplanet. See all Exoplanet ranked.
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