description Kepler-138d Overview
Outermost of the three originally confirmed Kepler-138 planets, a super-Earth orbiting its M-dwarf host every ~23.1 days, confirmed in 2015 alongside two inner companions.
help Kepler-138d FAQ
How good is Kepler-138d?
Kepler-138d scores 8.30/10 (Great) on Lunoo, making it a well-rated option in the Exoplanet category.
What are the best alternatives to Kepler-138d?
See our alternatives page for Kepler-138d for a ranked list with scores. Top alternatives include: Kepler-138c, Kepler-62e, Kepler-442b.
How does Kepler-138d compare to Kepler-138c?
See our detailed comparison of Kepler-138d vs Kepler-138c with scores, features, and an AI-powered verdict.
Is Kepler-138d worth it in 2026?
With a score of 8.30/10, Kepler-138d is highly rated in Exoplanet. See all Exoplanet ranked.
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