Eris is the most massive and second-largest known dwarf planet in the Solar System. Eris was discovered in January 2005 by a Palomar Observatory-based team led by Mike Brown, and its discovery was verified later that year. In September 2006 it was named after the goddess of strife and discord.
Orbital period: 558 years
Discovered: 5 January 2005
Radius: 1,163 km
Surface area: (1.70±0.02)Ă107 km2
Orbits:
Sun Moon: Dysnomia
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