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ice dwarfs Large distant interplanetary objects that exceed the size of a normal cometary nucleus and are much icier than an ordinary asteroid. The composition of asteroids varies somewhat as a function of distance from the Sun, so that the more distant Hildas and Trojans will certainly contain more icelike material than the main-belt asteroids. However, the vast majority of ice dwarfs are probably to be found in the Kuiper belt and beyond. Pluto, though traditionally considered a planet, is now regarded as among the largest icy dwarfs, along with other Kuiper belt objects and trans-Neptunian objects. Chiron and Pholus may also be placed in this category.