Eris
Eris is a relatively large dwarf planet. Located in the Scattered disc, it is slightly smaller than Pluto but actually has slightly more mass.
Eris (center) and Dysnomia (left of center), taken by the Hubble Space Telescope
Credit: NASA, ESA, and M. Brown
Facts About Eris:
- Eris is the most massive dwarf planet known in the Solar System.
- Despite having more mass than Pluto it is slightly smaller, making it the second-largest dwarf planet in the Solar System.
- It is one of the most distant known objects in the Solar System.
- It has one known moon, Dysnomia.
- It is the largest known body in the Solar System not yet visited by a robotic space probe.
Classification: Dwarf Planet (orbiting Sun)
Names: Eris, 136199 Eris
Discovered: 2005 by M. E. Brown, C. A. Trujillo, D. L. Rabinowitz
Orbital Period: 558.0400
Adjective: Eridian