description HD 128311 b Overview
HD 128311 b is a gas-giant exoplanet orbiting the K-type star HD 128311, about 53 light-years from Earth. It was detected through the radial-velocity technique used by the Anglo-Australian Planet Search and was reported in 2002. The planet is the inner member of a known multi-planet system. Its orbit is relatively close to the host star compared with the orbit of HD 128311 c.
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How good is HD 128311 b?
HD 128311 b scores 5.98/10 (Mediocre) on Lunoo, making it rated in the Exoplanet category.
What are the best alternatives to HD 128311 b?
See our alternatives page for HD 128311 b for a ranked list with scores. Top alternatives include: 55 Cancri b, Upsilon Andromedae c, HD 160691 b.
How does HD 128311 b compare to 55 Cancri b?
See our detailed comparison of HD 128311 b vs 55 Cancri b with scores, features, and an AI-powered verdict.
Is HD 128311 b worth it in 2026?
With a score of 5.98/10, HD 128311 b is a solid option in Exoplanet. See all Exoplanet ranked.
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