5652 Amphimachus
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5652 Amphimachus Template:IPAc-en is a Jupiter trojan from the Greek camp, approximately Script error: No such module "convert". in diameter. It was discovered on 24 April 1992, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California.[1] The dark Jovian asteroid belongs to the 80 largest Jupiter trojans and has a rotation period of 8.4 hours.[2] It was named from Greek mythology after Amphimachus, who was slain by Hector .[1]
Orbit and classification
Amphimachus is a dark Jovian asteroid orbiting in the leading Greek camp at Jupiter's Template:L4 Lagrangian point, 60° ahead of the Gas Giant's orbit in a 1:1 resonance (see Trojans in astronomy).[3] It is also a non-family asteroid in the Jovian background population.[4]
It orbits the Sun at a distance of 4.8–5.6 AU once every 11 years and 11 months (4,343 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.08 and an inclination of 2° with respect to the ecliptic.[5] The body's observation arc begins with a precovery at Palomar in April 1955, or 37 years prior to its official discovery observation.[1]
Physical characteristics
Amphimachus is an assumed C-type asteroid. It has a high V–I color index of 1.05.[2]
Rotation period
In August 2015, two rotational lightcurves of Amphimachus were obtained from photometric observations by the Kepler space telescope. Best-rated lightcurve analysis by Gyula M. Szabó gave a rotation period of Script error: No such module "val". hours with a brightness amplitude of 0.22 magnitude (U=2+Script error: No such module "Check for unknown parameters".).[6] The second, concurring observation gave a period of 8.39 hours and an amplitude of 0.20 magnitude (U=2+Script error: No such module "Check for unknown parameters".).[7]
Diameter and albedo
According to the surveys carried out by the Japanese Akari satellite and the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Amphimachus measures between 52.48 and 53.921 kilometers in diameter and its surface has an albedo between 0.061 and 0.077.[8][9]
The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.057 and calculates a diameter of 53.16 kilometers based on an absolute magnitude of 10.1.[2]
Template:Largest Jupiter trojans
Naming
This minor planet was named from Greek mythology after Amphimachus, son of Cteatus (Kteatos) and suitor of Helen of Troy. Amphimachus was a leader of the Elean (Epeian) contingent in the Trojan War. He was accidentally killed by Hector, who had thrown a spear at Teucer.[1] The official naming citation was published by the Minor Planet Center on 12 July 1995 (M.P.C. 25444Script error: No such module "Check for unknown parameters".).[10]
References
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- ↑ Script error: No such module "Citation/CS1". (online, AcuA catalog p. 153)
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Template:Webarchive)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (5001)-(10000) – Minor Planet Center
- Asteroid 5652 Amphimachus at the Small Bodies Data Ferret
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidata
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