Largest Dwarf Planets by Diameter

About This Dataset

This chart ranks the largest known dwarf planets and candidate dwarf planets in the Solar System by diameter in kilometers. Pluto leads at 2,377 km, narrowly ahead of Eris at 2,326 km, while Ceres - the only dwarf planet in the asteroid belt - measures 940 km.

✨ AI Insight

Pluto keeps its crown by a margin of only 51 kilometers over Eris - and it was Eris's discovery in 2005 that triggered the famous 2006 redefinition that cost Pluto its planet status. Eris is actually the more massive of the two despite being slightly smaller, because it is denser. The steep drop after the top two is notable: third-placed Haumea (1,632 km) is barely two-thirds of Pluto's size and spins so fast it is stretched into an egg shape. Ceres, at just 940 km, is the outlier in location as well as size - the only dwarf planet in the inner Solar System, orbiting in the asteroid belt where NASA's Dawn spacecraft mapped it in detail. Everything else on this list lives in the distant, barely-explored Kuiper Belt.

Source: NASA / JPL

Key Findings

Auto-computed highlights from this dataset

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Pluto leads with 2,377 in All Time.

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Average value in All Time: 1,492 · median: 1,330.

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Gap in All Time: Pluto is 2.6× larger than Orcus.