Asteroid 24999, Hieronymus, was discovered on July 24, 1998 by Petr Pravec at Ondrejov Observatory in Ondrejov, Czech Republic. It has a period of 4 years, 32 days and is just over 2 1/6 miles in diameter.
It was named for Dutch painter Hieronymus Bosch (real name Jeroen Anthonissen van Aken, 1450?-1516), known for his vivid paintings depicting human evil.
A portrait of Hieronymus Bosch created around 1550 and attributed to Jacques Le Boucq
Astrologically, Hieronymus seems to be about medievalism, "getting medieval.".