5264 Telephus

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5264 Telephus Template:IPAc-en is a large Jupiter trojan from the Greek camp, approximately Script error: No such module "convert". in diameter. It was discovered on 17 May 1991, by American astronomer couple Carolyn and Eugene Shoemaker at the Palomar Observatory in California,[1] and later named after King Telephus from Greek mythology.[2] The dark and possibly elongated D-type asteroid belongs to the 50 largest Jupiter trojans and has a rotation period of 9.5 hours.[3]

Classification and orbit

Telephus 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). It is also a non-family asteroid in the Jovian background population.[4][5]

It orbits the Sun at a distance of 4.6–5.8 AU once every 11 years and 11 months (4,342 days; semi-major axis of 5.21 AU). Its orbit has an eccentricity of 0.11 and an inclination of 34° with respect to the ecliptic.[6] The asteroid was first observed as Template:Mp at the Purple Mountain Observatory in January 1965. The body's observation arc begins with a precovery taken at Palomar in January 1989, more than 2 years prior to its official discovery observation.[1]

Physical characteristics

In both the Tholen- and SMASS-like taxonomy of the Small Solar System Objects Spectroscopic Survey (S3OS2), Telephus is a D-type asteroid.[5][7] In the SDSS-based taxonomy, it is also a D-type,[8] while the Collaborative Asteroid Lightcurve Link (CALL) assumes it to be a C-type.[3]

Rotation period

In June 1994, photometric observations of this asteroid by astronomers Stefano Mottola and Anders Erikson with the Dutch 0.9-metre Telescope at ESO's La Silla Observatory, Chile, were used to build a lightcurve. It showed a rotation period of 9.518 hours with a brightness amplitude of Script error: No such module "val". magnitude (U=3-Script error: No such module "Check for unknown parameters".).[9]

In May 2015, Telephus was observed in Chile, using the 4-meter Víctor M. Blanco Telescope and its DECam with a red filter in Chile. The lightcurve gave a concurring period of 9.540 hours and an brightness variation of 0.20 in magnitude (U=3-Script error: No such module "Check for unknown parameters".).[10] In May 2016, follow-up observation by Robert Stephens and Daniel Coley at the Center for Solar System Studies, California, and Linda French at Wesleyan University gave the so-far best rated period of Script error: No such module "val". hours with an amplitude of 0.47 (U=3Script error: No such module "Check for unknown parameters".).[3][11]Template:Efn Due to its higher than usual brightness variation, this Jovian asteroid is likely to have a non-spherical shape.

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, the asteroid measures between 68.47 and 81.38 kilometers in diameter and its surface has an albedo between 0.043 and 0.072.[12][13][14] CALL agrees with the results obtained by IRAS, and derives an albedo of 0.0571 with a diameter of 73.33 kilometers, based on an absolute magnitude of 9.4.[3]

Template:Largest Jupiter trojans

Naming

This minor planet was named from Greek mythology after King Telephus. He is the grandson of Zeus and son of Heracles, after whom the Apollo near-Earth asteroids 5731 Zeus and 5143 Heracles were named, respectively. Telephus was the son-in-law of King Priam of Troy, but fought with the Greeks in the Trojan War.[2] 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".).[15]

Notes

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References

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  1. ↑ a b Script error: No such module "citation/CS1".
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  3. ↑ a b c d Script error: No such module "citation/CS1".
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  5. ↑ a b Script error: No such module "citation/CS1".
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ Script error: No such module "Citation/CS1".
  8. ↑ Script error: No such module "Citation/CS1". (PDS data set)
  9. ↑ Script error: No such module "Citation/CS1".
  10. ↑ Script error: No such module "Citation/CS1".
  11. ↑ Script error: No such module "Citation/CS1".
  12. ↑ Script error: No such module "Citation/CS1". (online catalog)
  13. ↑ Script error: No such module "Citation/CS1".
  14. ↑ Script error: No such module "Citation/CS1". (online, AcuA catalog p. 153)
  15. ↑ Script error: No such module "citation/CS1".
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External links

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