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(687170) 2011 QF 99 was identified as the first Uranus trojan in 2013. It is located at the L 4 Lagrangian point. A second one, (636872) 2014 YX 49, was announced in 2017. [17] 2013 ND 15 is a temporary Venusian trojan, the first one to be identified. The large asteroids Ceres and Vesta have temporary trojans. [18]
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.
Asteroids in the leading (L 4) orbit are named after Greek heroes (the "Greek node or camp" or "Achilles group"), and those at the trailing (L 5) orbit are named after the heroes of Troy (the "Trojan node or camp"). [2] The asteroids 617 Patroclus and 624 Hektor were named before the Greece/Troy rule was devised, resulting in a "Greek spy ...
Asteroids in the L 4 and L 5 Sun–Mars Lagrangian points are sometimes called Mars trojans, with a lower-case t, as "Trojan asteroid" was originally defined as a term for Lagrangian asteroids of Jupiter. They may also be called Mars Lagrangian asteroids.
[4] [5] Trojan objects are most easily conceived as orbiting at a Lagrangian point, a dynamically stable location (where the combined gravitational force acts through the Sun's and Earth's barycenter) 60 degrees ahead of or behind a massive orbiting body, in a type of 1:1 orbital resonance. In reality, they oscillate around such a point.
This is a list of Jupiter trojans that lie in the Greek camp, an elongated curved region around the leading Lagrangian point (L 4), 60° ahead of Jupiter in its orbit.. All the asteroids at Jupiter's L 4 point have names corresponding to participants on the Greek side of the Trojan War, except for 624 Hektor, which was named before this naming convention was instituted.
Jupiter trojan – asteroids located in Jupiter's L 4 and L 5 Lagrange points; From 50 to 99 km. This list contains a selection of objects 50 and 99 km in radius (100 ...
The L 5 group (shown in green) and the L 4 group (light blue) of Mars and Jupiter trojan asteroids shown along with the orbits of Jupiter and the inner planets. Mars is shown in red. The outer orbit is that of Jupiter. Animation of 1999 UJ7 relative to Sun and Mars 1600-2500