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Jupiter-trojan families are much smaller in size than families in the asteroid belt; the largest identified family, the Menelaus group, consists of only eight members. [ 5 ] In 2001, 617 Patroclus was the first Jupiter trojan to be identified as a binary asteroid . [ 21 ]
An Earth trojan is an asteroid that orbits the Sun in the vicinity of the Earth–Sun Lagrange points L 4 (leading 60°) or L 5 (trailing 60°), thus having an orbit similar to Earth's. Only two Earth trojans have so far been discovered.
Spotting an asteroid sharing Earth's orbit is normally difficult from the ground, because their potential locations are generally in the daytime sky. [8] After follow-up work at the University of Hawaii and the Canada–France–Hawaii Telescope, its orbit was evaluated on 21 May 2011 and the trojan character of its motion was published in July ...
This makes 2020 XL 5 the largest Earth trojan asteroid known to date, being up to three times as large as the 0.3 km (0.19 mi)-sized 2010 TK 7. [ 7 ] Because 2020 XL 5 is only visible at low altitudes in the sky during twilight , atmospheric distortions and scattered light from the Sun hinder accurate photometry of the asteroid's light curve ...
In astronomy, a trojan is a small celestial body (mostly asteroids) that shares the orbit of a larger body, remaining in a stable orbit approximately 60° ahead of or behind the main body near one of its Lagrangian points L 4 and L 5.
Hektor is the first known trojan with a satellite companion and, so far, one of only four known binary trojan asteroids in the L 4 group (the others being 16974 Iphthime, 3548 Eurybates, and 15094 Polymele). 617 Patroclus, another large trojan asteroid of the L 5 group, consists of two almost equal-sized components. [13]
1172 Äneas / ɪ ˈ n iː ə s / is a large Jupiter trojan from the Trojan camp, approximately 140 kilometers (90 miles) in diameter. It was discovered on 17 October 1930, by astronomer Karl Reinmuth at the Heidelberg Observatory in southwest Germany. [1] The dark D-type asteroid is one of the largest Jupiter trojans and has a rotation period ...
Ennomos is a Jovian asteroid orbiting in the trailing Trojan camp at Jupiter's L 5 Lagrangian point, 60° behind its orbit in a 1:1 resonance (see Trojans in astronomy). [5]It orbits the Sun at a distance of 5.1–5.4 AU once every 12 years (4,387 days; semi-major axis of 5.24 AU).