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1873 Agenor
1873 Agenor, provisional designation 1971 FH, is a dark Jupiter trojan, approximately 54 kilometers in diameter. It was discovered on March 25, 1971 by Cornelis van Houten and I. van Houten-Groeneveld at Leiden, on photographic plates taken by Tom Gehrels at the U.S. Palomar Observatory in the Palomar Mountain Range, southeast of Los Angeles.〔
The Trojan asteroid dwells in the Lagrangian point, 60 degrees behind Jupiter in the so-called "Trojan camp". It orbits the Sun at a distance of 4.8–5.7 AU once every 12 years (4,378 days). In 1994, photometric observations were used to build a light-curve showing a rotation period of hours with a brightness variation of in magnitude.〔 The C-type asteroid has an albedo between 0.03 and 0.07, as measured by the Akari and WISE/NEOWISE missions.〔〔
The discovery was made in a survey of faint Trojans, one night after the discovery of 1870 Glaukos. The trio of Dutch and Dutch–American astronomers also collaborated on the productive Palomar–Leiden survey in the 1960s, using the same procedure as for this (smaller) survey: Tom Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis and Ingrid van Houten at Leiden Observatory where astrometry was carried out.
It was named after the Trojan warrior Agenor, who fought and wounded Achilles. The Olympian deity Apollo assumed his form in order to lead Achilles away from the retreating Trojans. The minor planets 588 Achilles and 1862 Apollo are named after these two figures of Greek mythology.〔
== References ==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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