Eris

2003 UB313

Discovered 05/01/2005 · Michael E. Brown, Chadwick Trujillo, David L. Rabinowitz

Discovery triggered Pluto's reclassification

Mean Radius

1,163 km

Gravity

0.82 m/s²

Temperature

42 K (-231°C)

Orbital Period

203830.0 d

Distance

68.049 AU

Physical Properties

Mean Radius1,163 km

Mass1.6600 × 10^22 kg

Surface Gravity0.82 m/s²

Density2.520 g/cm³

Escape Velocity1.38 km/s

Mean Temperature42 K (-231°C)

Axial Tilt0.00°

Rotation Period25.92 h

AtmosphereYes

Ring SystemNone

Known Moons1

Orbital Elements (J2000)

Semi-major Axis68.048950 AU

Eccentricity0.440680

Inclination44.0445°

Orbital Period203830.00 days

Asc. Node (Ω)35.95310°

Arg. Perihelion (ω)151.63900°

Mean Anomaly (M₀)205.98900°

Perihelion5765732799.000 AU

Aphelion14594512904.000 AU

Known Moons (1)

Dysnomie

Data Sources

Physical & orbital data: Solar System OpenData API (api.le-systeme-solaire.net) · Orbital elements: NASA JPL Horizons System (J2000 epoch)