Eris

Description:
Eris is the most massive and second-largest dwarf planet in the known 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 Eris, the Greek goddess of strife and discord

Radius: 1,163 km

Orbital period: 558 years

Discovered: 5 January 2005

Surface area: (1.70±0.02)×107 km2

Moon: Dysnomia

Did you know: Eris has a diameter of 1,451 miles (2,336 Kilometers).