1 day / second

0.5 AU

136199 Eris

Dwarf Planet

A large trans-Neptunian dwarf planet slightly more massive than Pluto but smaller in volume, notable for its highly inclined and elongated orbit that takes 557 years to complete.

Key Facts

orbital regime

Kuiper Belt

learn more

Wikipedia

mass

1.6466e+22 kg

radius

1,163 km

hill radius

0.054 AU

semi-major axis

67.864 AU

eccentricity

0.436

inclination

44.04º

longitude of the ascending node

35.951º

argument of periapsis

151.639º

orbital period

559.059 years

surface gravity

0.083 g

discovery date

October 21, 2003

discovered by

Michael E. Brown, David L. Rabinowitz, and Chadwick Trujillo at Palomar Mountain Observatory

name origins

Named after Eris, the Greek goddess of strife and discord

albedo

0.96

material composition

Frozen methane surface

density

2.52 g/cm³
Other Dwarf Planets
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Orcus
Haumea
Makemake
Gonggong
2012 VP113