'4501 Eurypylos /jʊˈrɪpɪləs/ is a Jupiter trojan from the Greek camp, approximately 46 kilometers (29 miles) in diameter. It was discovered on 4 February 1989 by Belgian astronomer Eric Elst at ESO's La Silla Observatory in Chile.^[1] The dark Jovian asteroid has a short rotation period of 6.1 hours.^[8] It was named after the Thessalian king Eurypylus from Greek mythology.^[1]

Eurypylos is a dark Jovian asteroid in a 1:1 orbital resonance with Jupiter. It is located in the leading Greek camp at the Gas Giant's L₄ Lagrangian point, 60° ahead of its orbit (see Trojans in astronomy). It is also a non-family asteroid in the Jovian background population.^[5] It orbits the Sun at a distance of 4.9–5.5 AU once every 11 years and 11 months (4,342 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.05 and an inclination of 8° with respect to the ecliptic.^[3] The body's observation arc begins with a precovery taken at Palomar Observatory in December 1951, more than 36 years prior to its official discovery observation at La Silla.^[1]

Eurypylos is an assumed C-type, while most larger Jupiter trojans are D-type asteroids.^[8]

This minor planet was named from Greek mythology after the legendary king Eurypylus, the leader of the Thessalian contingent, who brought 40 ships to the siege of Troy. During the Trojan War, he was wounded by an arrow from Paris but was rescued by Patroclus. The official naming citation was published by the Minor Planet Center on 4 October 1990 (M.P.C. 17031).^[9]