Asteroid 4849, Ardenne, was discovered on August 17,1936 by Karl Reinmuth. at Heidelberg, Germany. It has a period of 3 years, 161 days and is about 2 3/5 miles in diameter.
It was named for German inventor and astronomy popularizer Manfred von Ardenne (1907-1997).
Manfred von Ardenne
Its meaning seems to be sudden setbacks (Henk Middelraad).