4581 Asclepius is a small asteroid of the Apollo group that can approach Earth's orbit to within 600,000 km. Asclepius was discovered in 1989 by the American astronomers Henry Holt (1929–2019) and Norman Thomas (1930–2020).
On 22 March 1989, Asclepius passed by Earth on at a distance of 0.00457 AU (684,000 km or 425,000 mi).
|diameter||several hundred meters|
|semimajor axis||1.023 AU|