Andromeda
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Dwarf planet

Eris

Open in OuranosCompare its size

Almost Pluto's size and more massive; its discovery is why Pluto was reclassified. Artist's impression: its surface hasn't been observed up close yet. This look is generated from many factors as a best guess at what it might look like, and will be updated as more data comes in.

Measured

Mean radius
1,163 km
From the Earth today
94.6 AU (14.2 billion km)

How far, from the Earth

94.6 AU. To cross it:

  • Light13 hours
  • Voyager 1's speed26.6 years
  • Driving at 100 km/h16,100 years

Voyager 1 at the speed it moved outward over the year to 2026-10-25 (JPL Horizons). Driving: nonstop, never refuelling.

Moons (1 in Ouranos)

Dysnomia

Where this comes from

  • Planets, Pluto, the Moon and Jupiter's big moons: astronomy-engine (Don Cross, MIT). Other moons: JPL Planetary Satellite Mean Elements. Ceres, Eris, Haumea, Makemake: JPL Small-Body Database. NASA/JPL-Caltech.

Every catalogue Ouranos draws is credited on the credits page.