Limits RegistryPUBLIC RECORD
Limits RegistryEris, a distant Kuiper Belt object discovered in 2005, has a mass of about 1.66 x 10^22 kg — roughly 27% more massive than Pluto, though slightly smaller in diameter — making it the most massive known dwarf planet. Its discovery directly triggered the International Astronomical Union's 2006 redefinition of 'planet,' which reclassified Pluto (and Eris itself) as dwarf planets.
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Eris, a distant Kuiper Belt object discovered in 2005, has a mass of about 1.66 x 10^22 kg — roughly 27% more massive than Pluto, though slightly smaller in diameter — making it the most massive known dwarf planet. Its discovery directly triggered the International Astronomical Union's 2006 redefinition of 'planet,' which reclassified Pluto (and Eris itself) as dwarf planets.
The greatest mass measured for any object classified as a dwarf planet in the solar system.
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1 accepted Claim, with 1 linked evidence records.
Permanent ID limitsregistry.com/limits/LR-MOST-MASSIVE-DWARF-PLANET
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Limits Registry. LR-MOST-MASSIVE-DWARF-PLANET. Most massive known dwarf planet. 2026.