ERIS.
A distant, icy frontier.
SCHEMATIC / NOT A SURFACE MAP
01 /
The measured world
- Mean radius
- 1,163 km
- Mean diameter
- 2,326 km
- Orbital period
- 203,830 Earth days
- Mean distance from Sun
- 67.78 AU
- Reported moons
- 1
Rounded reference values. Rotation is sidereal and differs from the solar day. Giant planets have no solid surface; temperature and gravity use atmospheric reference levels. Some moon counts are omitted because discoveries change them.
Compare with EarthA closer look
Its known moon is named Dysnomia.
Discovery
Announced in 2005 by a team led by Mike Brown.
Exploring Eris
No encounters are included in this record.
Search missions