Eris

Discovered 2005-01-05 by Mike Brown, Chad Trujillo, David Rabinowitz. Discovery triggered Pluto's reclassification

Mean Radius

1,163 km

Gravity

0.82 m/s²

Orbital Period

204050.0 d

Distance

67.800 AU

Temperature

30 K

Physical Properties

Mean Radius1,163 km

Mass1.6466 × 10^22 kg

Surface Gravity0.82 m/s²

Density2.52 g/cm³

Escape Velocity1.38 km/s

Mean Temperature30 K (-243°C)

Axial Tilt78°

Rotation Period25.90 h

AtmosphereYes

Ring SystemNone

Orbital Elements (J2000)

Semi-major Axis67.800000 AU

Eccentricity0.44068000

Inclination44.04450°

Asc. Node (Ω)35.95310°

Arg. Perihelion (ω)151.63900°

Mean Anomaly (M₀)205.98900°

Orbital Period204050.000 days

Perihelion38.271 AU

Aphelion97.650 AU