Discovered by Clyde Tombaugh, for 10 points, name this dwarf planet that was reclassified in 2006.
The argument of pericenter figures in the Kozai mechanism, which explains why this entity is protected from encounters with a certain other body. Deviation in its temperature are explained by the anti-greenhouse effect. Albedos of 0.04 to 0.35 are assumed for two of its satellites, Nix and Hydra. A short-term reduction in gravity was jokingly attributed to Jupiter and this entity, which is the largest distinct object in the scattered disc subregion of the Kuiper belt. Discovered by Clyde Tombaugh, for 10 points, name this dwarf planet that was reclassified in 2006.
The argument of pericenter figures in the Kozai mechanism, which explains why this entity is protected from encounters with a certain other body.
Pluto