1 day / second

0.5 AU

136108 Haumea

Dwarf Planet

A rapidly-rotating dwarf planet shaped like an egg due to its high spin rate, with two small moons and a dense ring system orbiting beyond Neptune in the Kuiper Belt.

Key Facts

orbital regime

Kuiper Belt

learn more

Wikipedia

mass

4.0060e+21 kg

radius

780 km

hill radius

0.03 AU

semi-major axis

43.116 AU

eccentricity

0.196

inclination

28.214º

longitude of the ascending node

122.167º

argument of periapsis

239.041º

orbital period

283.111 years

surface gravity

0.045 g

discovery date

March 7, 2003

discovered by

Both José Luis Ortiz Moreno at Sierra Nevada Observatory and Michael E. Brown at Cerro Tololo Inter-American Observatory claim discovery

name origins

Named after Haumea, the Hawaiian goddess of fertility

dimensions

Elongated ellipsoid shape, approximately 1,960 x 1,518 x 996 kilometers

material composition

Rocky core with pure crystalline water ice surface

density

2.6 g/cm³

albedo

0.78
Other Dwarf Planets
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Sedna
Orcus
Eris
Makemake
Gonggong