Tags: Planet.
1155 Aënna is a main belt asteroid orbiting the Sun. Approximately 12 kilometers in diameter it makes a revolution around the Sun once every 4 years. It was discovered by Karl Wilhelm Reinmuth at Heidelberg Germany on January 26 1928. The name contains the German pronunciation of the initials A and N followed by the feminine ending to honor the Astronomische Nachrichten. The name was proposed by the Astronomisches Rechen-Institut. The provisional designation for the asteroid was 1928 BD.