2363 Cebriones /sɪˈbraɪəniːz/ is a large Jupiter trojan from the Trojan camp, approximately 84 kilometers (52 miles) in diameter. It was discovered on 4 October 1977, by astronomers at the Purple Mountain Observatory in Nanking, China.^[1] The dark D-type asteroid is one of the 40 largest Jupiter trojans and has a rotation period of 20 hours.^[4] It was named after Cebriones, Hektor's charioteer from Greek mythology.^[1]

Cebriones is a dark Jovian asteroid orbiting in the trailing Trojan camp at Jupiter's L₅ Lagrangian point, 60° behind its orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid of the Jovian background population.^[6][14]

It orbits the Sun at a distance of 5.0–5.4 AU once every 11 years and 11 months (4,338 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.04 and an inclination of 32° with respect to the ecliptic.^[3] The body's observation arc begins with a precovery taken at Palomar Observatory in August 1953, more than 24 years prior to its official discovery observation at Nanking.^[1]

This minor planet was named from Greek mythology after King Priam's illegitimate son, Cebriones (Kebriones). He was the half-brother of Hektor and his final charioteer during the Trojan War, wounded in the duel between Hektor and Patroclus.^[1] The official naming citation was published by the Minor Planet Center on 1 August 1981 (M.P.C. 6209).^[17]

In the Tholen classification, Cebriones is a dark D-type asteroid.^[3][4][14]