Discovered by K. Reinmuth Alternative names 1919 FD Observation arc 96.81 yr (35359 days) Orbital period 12 years Orbits Sun Asteroid group Jupiter trojan | Discovery date 19 March 1919 Minor planet category Jupiter Trojan Aphelion 5.6215 AU (840.96 Gm) Discovered 19 March 1919 Discoverer Karl Wilhelm Reinmuth | |
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Discovery site Landessternwarte Heidelberg-Königstuhl Similar 588 Achilles, 617 Patroclus, Jupiter trojan, 624 Hektor, Sun | ||
911 Agamemnon is a large 167 kilometres (104 mi) trojan asteroid that orbits the Sun at the same distance as the planet Jupiter. It is located in the leading Lagrangian point L4. Based on IRAS data, Agamemnon is 167 kilometres (104 mi) in diameter and is probably the 2nd largest Jupiter Trojan. Recent observations of the asteroid's occultations characterize its shape and are suggestive of Agamemnon to have a satellite.
It was discovered by Karl Wilhelm Reinmuth on March 19, 1919, in Heidelberg, Germany. It is named after King Agamemnon, a main character of the Iliad.
Photometric observations of this asteroid during 1997 were used to build a light curve showing a rotation period of 6.5819 ± 0.0007 hours with a brightness variation of 0.29 ± 0.01 magnitude. A 2009 study yielded a period of 6.592 ± 0.004, in reasonable agreement with the previous result.