Donald Duck universe Donald Duck universe The Donald Duck universe is a fictional shared universe which is the setting of stories involving Disney cartoon character Donald Duck, as well as Daisy Duck, Huey, Dewey, and Louie, Scrooge McDuck, and many other characters. The world is a part of the Mickey Mouse universe, but is more detailed. Life in the Donald Duck universe centers on the city of Duckburg, usually located in the fictional U.S. state of Calisota, analogous to Northern California. The world also incorporates several other real and fictional locations, as well as historical figures and a fictional timeline, which is followed
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"