Mickey Mouse universe to Duckburg, the city in which Donald Duck lives (see Donald Duck universe). According to traditional continuity, both cities are located in the fictional U.S. state of Calisota – analogous to Northern California. The most consistent aspect of the Mickey Mouse universe is the characters. The most well-known include Mickey's girlfriend Minnie, pet dog Pluto, friends Horace Horsecollar, Clarabelle Cow, Donald Duck, Daisy Duck and Goofy, and nemesis Pete. Some Disney productions incorporate characters from Disney's animated feature films, such as "Bath Day" (1946; in which Figaro from "Pinocchio" appears as Minnie's cat), "Mickey's Christmas Carol" (1983), and – most
1313 Berna rotational light-curve of "Berna". Light-curve analysis gave a rotation period of hours with a brightness variation of 0.28 magnitude (). In November 2007, photometric observations at Cerro Tololo, Chile, using its 0.9-meter Prompt5 telescope in combination with the Spitzer Space Telescope gave a concurring period of 25.46 hours with an amplitude of 0.5 magnitude (). Other light-curves were also obtained by several amateur astronomers giving a period of 6, 25.4 and 25.45 hours, respectively (). In February 2004, a satellite orbiting the asteroid was discovered. The moon, designated S/2004 (1313) 1, measures about 11 kilometers in diameter and orbits "Berna"