4708 Polydoros
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4708 Polydoros Script error: No such module "IPAc-en". is a Jupiter trojan from the Trojan camp, approximately Script error: No such module "convert". in diameter. It was discovered on 11 September 1988, by American astronomer Carolyn Shoemaker at the Palomar Observatory in California.[1] The D-type asteroid belongs to the 80 largest Jupiter trojans and has a rotation period of 7.5 hours.[2] It was named after the Trojan prince Polydorus, from Greek mythology.[1]
Orbit and classification
Polydoros is a Jovian asteroid located in the L5 Lagrangian point, 60° behind on Jupiter's orbit in the so-called Trojan camp Template:Crossreference.[3] It is also a non-family asteroid of the Jovian background population.[4]
It orbits the Sun at a distance of 4.9–5.6 AU once every 12 years and 1 month (4,403 days; semi-major axis of 5.26 AU). Its orbit has an eccentricity of 0.06 and an inclination of 7° with respect to the ecliptic.[5] The body's observation arc begins with its official discovery observation at Palomar in September 1988.[1]
Physical characteristics
In the SDSS-based taxonomy, Polydoros is a dark D-type asteroid.[6] It has also been characterized as a D-type by Pan-STARRS' survey.[2][7] Its V–I color index of 0.96 is typical for most larger D-type Jupiter trojans (see table below).[2]
Rotation period
In August 2011, a rotational lightcurve of Polydoros was obtained from photometric observations by Linda French at the Cerro Tololo Inter-American Observatory in Chile. Lightcurve analysis, however, gave an incorrect rotation period of Script error: No such module "val". hours with a brightness variation of 0.25 magnitude (U=0Script error: No such module "Check for unknown parameters".).[2][8]
Several subsequent observations during 2014–2018 by Daniel Coley and Robert D. Stephens at the Center for Solar System Studies achieved a good period determination,[9][10]Template:Efn with the best-rated one from November 2015, which gave a period of Script error: No such module "val". hours and an amplitude of 0.17 magnitude (U=3Script error: No such module "Check for unknown parameters".).[2][9]
Diameter and albedo
According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Polydoros measures 54.96 kilometers in diameter and its surface has an albedo of 0.064,[11] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057, and calculates a diameter of 55.67 kilometers based on an absolute magnitude of 10.0.[2]
Template:Largest Jupiter trojans
Naming
This minor planet was named by the discoverer from Greek mythology after the Trojan prince Polydorus, the youngest and swiftest of King Priam's many sons. Although forbidden by his father, Polydoros confronted Achilles anyway, and was killed by him beside the River Scamander, near his brother Lycaon Template:Crossreference.[1] The official naming citation was published by the Minor Planet Center on 28 April 1991 (M.P.C. 18144Script error: No such module "Check for unknown parameters".).[12]
Notes
References
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- ↑ Script error: No such module "Citation/CS1". (PDS data set)
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External links
- Asteroid Lightcurve Database (LCDB), query form (info Script error: No such module "webarchive".)
- Dictionary of Minor Planet Names, Google books
- Discovery Circumstances: Numbered Minor Planets (1)-(5000) – Minor Planet Center
- Asteroid 4708 Polydoros at the Small Bodies Data Ferret
- Template:AstDys
- Template:PAGENAMEBASE at the JPL Small-Body DatabaseTemplate:EditAtWikidataTemplate:WikidataCheck
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