Largest Dwarf Planets by Diameter
About This Dataset
Largest Dwarf Planets by DiameterPluto 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.
Key Findings
Data Insights
Numbers, trends & sources behind this chart
Methodology & source
- Data source
- NASA / JPL
- Coverage
- 8 entities · 8 observations
- Measure
- Diameter (km)
- Last updated
- 6 July 2026
- Compiled by
- The ANYSTAT team, from the source above
- Values are shown as reported by the source. Nothing is rescaled, rebased or converted — the only changes are thousand separators and decimals shown to two places.
- Entities are ranked highest-first on their value.
Data Sources & References
All external sources cited in this dataset
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