2,326 km
Diameter
1.668 × 10²²
Mass
203,830 days
Orbit
14.6 hrs
Day Length
1
Moons
-231°C
Avg Temp
The most massive known dwarf planet and the most distant. Its discovery triggered the debate that redefined what "planet" means.
Did you know? Eris's discovery in 2005 forced astronomers to create the "dwarf planet" category. Its moon is named Dysnomia — Eris's daughter in Greek myth!
Atmosphere
Thin N₂, CH₄
Interactive 3D Model
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