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2363 Cebriones

Large Jupiter Trojan

Field	Value
minorplanet	yes
name	2363 Cebriones
background	#C2FFFF
discovery_ref
discoverer	Purple Mountain Obs.
discovery_site	Purple Mountain Obs.
discovered	4 October 1977
mpc_name	(2363) Cebriones
alt_names
adjective	Cebrionian
pronounced
named_after	Cebriones (Kebriones)
(Greek mythology)
mp_category	Jupiter trojan
Trojanbackground
orbit_ref
epoch	23 March 2018 (JD 2458200.5)
uncertainty	0
observation_arc	64.78 yr (23,660 d)
aphelion	5.3936 AU
perihelion	5.0176 AU
semimajor	5.2056 AU
eccentricity	0.0361
period	11.88 yr (4,338 d)
mean_anomaly	280.29°
mean_motion	/ day
inclination	32.136°
asc_node	211.74°
arg_peri	53.880°
jupiter_moid	0.3475 AU
tisserand	2.6920
mean_diameter

rotation	(poor)

albedo

spectral_type	Tholen D
U–B 0.251
B–V
V–R
V–I
abs_magnitude
9.11

(Greek mythology) Trojanbackground

U–B 0.251 B–V
V–R
V–I
9.11

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

Orbit and classification

Cebriones is a dark Jovian asteroid orbiting in the trailing Trojan camp at Jupiter's 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.

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. 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.

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. The official naming citation was published by the Minor Planet Center on 1 August 1981 (M.P.C. 6209).

Physical characteristics

In the Tholen classification, Cebriones is a dark D-type asteroid.

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 (), superseding a previous measurement of a fragmentary lightcurve that gave 3.8 hours only ().

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 ().

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.

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.

References

Noah Webster (1884) ''A Practical Dictionary of the English Language''

Info: Wikipedia Source

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