Mor Gal Tal
Mor Gal Tal is an uninhabitable icy asteroid.
It was where the Utrom High Council banished Ch'rell in the 2003 TV series as seen in the "Exodus, Part 2" episode.[1]
He remained there until he was returned to Earth in Turtles Forever by the 1987-1996 series Shredder, where Ch'rell was found frozen in ice.