is eris a dwarf planet
The orbit of Eris. Eris is a dwarf planet and a trans-Neptunian object (TNO). Eris is the second-largest dwarf planet known in the Solar System. It is a scattered disc object and it is in the Kuiper belt, farther out than Pluto. It is also called a plutoid because the IAU decided to rename all trans-Neptunian dwarf planets as plutoids.