why do you call a dwarf planet a dwarf planet?
Dwarf planets as 'plutoids'. Pluto, Eris, Haumea and Makemake are all known as  plutoids , unlike the asteroidal dwarf planetoid Ceres. A plutoid is a dwarf planet with an orbit outside that of Neptune.Plutoids are sometimes also referred to as  ice dwarfs  due to their diminutive size and cold surface temperatures.ris. When it was first discovered, Eris was thought to be the largest of the dwarf planets, with a mass 27 percent larger than that of Pluto and a diameter of approximately 1,400 to 1,500 miles (2,300 to 2,400 km).