Why are some planets classfied as Dwarf Planets? Dwarf Planets do not meet the expectations of larger planets, these are the reasons a planet is classified as a Dwarf Planet, Orbits the Sun and is not a moon. Has enough mass to have a nearly round shape Has not cleared the neighborhood around its orbit. In other words, other celestial objects still exist within its orbit around the Sun.
Size and movement of Dwarf Planets: Dwarf planets typically are smaller in size, irregularly shaped and/or do not have a clear orbital path.