2363 Cebriones

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2363 Cebriones is a large Jupiter trojan from the Trojan camp, approximately Script error: No such module "convert". 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.[2] It was named after Cebriones, Hektor's charioteer from Greek mythology.[1]

Orbit and classification

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.[3][4]

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.[5] 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]

Naming

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. 6209Script error: No such module "Check for unknown parameters".).[6]

Physical characteristics

In the Tholen classification, Cebriones is a dark D-type asteroid.[5][2][4]

Rotation period

In February 1992, a rotational lightcurve of Cebriones was obtained from photometric observations by Stefano Mottola and Anders Erikson using the now decommissioned ESO 1-metre telescope at La Silla Observatory in Chile. Lightcurve analysis gave a rotation period of 20.05 hours with a brightness variation of 0.22 magnitude (U=3Script error: No such module "Check for unknown parameters".),[7] superseding a previous measurement of a fragmentary lightcurve that gave 3.8 hours only (U=1Script error: No such module "Check for unknown parameters".).[8]

In May 2008 and September 2010, observations by Brian A. Skiff and Adrián Galád gave a concurring period of 20.081 and 20.5 hours with an amplitude of 0.22 and 0.13, respectively (U=2+3Script error: No such module "Check for unknown parameters".).[9][10]

Diameter and albedo

According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Cebriones measures between 81.84 and 95.98 kilometers in diameter and its surface has an albedo between 0.044 and 0.0599.[11][12][13]

The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, an albedo of 0.0599 and a diameter of 81.84 kilometers based on an absolute magnitude of 9.11.[2]

Template:Largest Jupiter trojans

References

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  12. ↑ Script error: No such module "Citation/CS1". (online, AcuA catalog p. 153)
  13. ↑ Script error: No such module "Citation/CS1". (online catalog)

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External links

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