 Ida was discovered on 29 September 1884 by Austrian astronomer Johann Palisa at the Vienna Observatory . It was his 45th asteroid discovery . Ida was named by Moriz von <unk> , a Viennese brewer and amateur astronomer . In Greek mythology , Ida was a nymph of Crete who raised the god Zeus . Ida was recognized as a member of the Koronis family by Kiyotsugu Hirayama , who proposed in 1918 that the group comprised the remnants of a destroyed precursor body . 
