By the way, the odds that Sedna is actually Yuggoth have just increased:

Chad Trujillo, the team's lead researcher at the Gemini Observatory, says collisions with other objects may have helped expose the icy interiors of Pluto and Charon and believes a lack of collisions might explain Sedna's ice-free surface.

He says Sedna, which is probably made up of an equal mixture of ice and rock, may be covered with a metre or so of hydrocarbon sludge. This sludge is produced when the Sun's ultraviolet radiation and charged particles alter the chemical bonds between atoms in the ice.

"You just get this big tangle of carbon and hydrogen bonds, which turns the surface dark like asphalt or tar," he told New Scientist. A similar "space weathering" process occurs on a 200-kilometre-wide object called Pholus, which lies near Saturn and is also very red.

From the New Scientist.