5130 Ilioneus
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5130 Ilioneus Template:IPAc-en is a dark Jupiter trojan from the Trojan camp, approximately Script error: No such module "convert". in diameter. It was discovered on 30 September 1989, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California.[1] The assumed C-type asteroid belongs to the 70 largest Jupiter trojans and has a rotation period of 14.8 hours.[2] It was named after Ilioneus from Greek mythology.[1]
Orbit and classification
Ilioneus is a dark Jovian asteroid orbiting in the trailering Trojan camp at Jupiter's Template:L5 Lagrangian point, 60° behind on the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy). It is also a non-family asteroid of the Jovian background population.[3]
It orbits the Sun at a distance of 5.2–5.3 AU once every 11 years and 11 months (4,343 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.01 and an inclination of 16° with respect to the ecliptic.[4] The body's observation arc begins with a precovery taken at Palomar in December 1955, almost 34 years prior to its official discovery observation.[1]
Naming
This minor planet was named by the discover from Greek mythology after Ilioneus, a ship commander and official spokesman under Aeneas.[1] The official naming citation was published by the Minor Planet Center on 4 June 1993 (M.P.C. 22249Script error: No such module "Check for unknown parameters".).[5]
Physical characteristics
Ilioneus is an assumed C-type asteroid. Its V–I color index of 0.96 is typical for most D-type asteroids, the dominant spectral type among the Jupiter trojans.[2]
Rotation period
Photometric observations of Ilioneus were obtained by Stefano Mottola in February 1994. Lightcurve analysis gave a rotation period of Script error: No such module "val". hours with a brightness amplitude of 0.16 magnitude (U=3Script error: No such module "Check for unknown parameters".).[2][6]
Follow-up observations by astronomers at the Palomar Transient Factory in 2013, and by Robert D. Stephens at the Center for Solar System Studies in 2015 and 2017, gave a concurring period determination with an amplitude between 0.18 and 0.34 (U=2/3/3Script error: No such module "Check for unknown parameters".).[2][7][8][9]Template:Efn
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite, the Infrared Astronomical Satellite IRAS, and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Ilioneus measures between 52.49 and 60.71 kilometers in diameter and its surface has an albedo between 0.060 and 0.077.[10][11][12] The Collaborative Asteroid Lightcurve Link derives an albedo of 0.0602 and a diameter of 59.40 kilometers based on an absolute magnitude of 9.8.[2]
Template:Largest Jupiter trojans
Notes
References
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- ↑ Script error: No such module "Citation/CS1". (online, AcuA catalog p. 153)
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- ↑ Script error: No such module "Citation/CS1". (online catalog)
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External links
- Lightcurve Database Query (LCDB), at www.minorplanet.info
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- Asteroid 5130 Ilioneus at the Small Bodies Data Ferret
- Template:AstDys
- Template:JPL Small Body
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