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Whether or not a system of star, planet, and trojan is stable depends on how large the perturbations are to which it is subject. If, for example, the planet is the mass of Earth, and there is also a Jupiter-mass object orbiting that star, the trojan's orbit would be much less stable than if the second planet had the mass of Pluto.
The Jupiter trojans, commonly called trojan asteroids or simply trojans, are a large group of asteroids that share the planet Jupiter's orbit around the Sun. Relative to Jupiter, each trojan librates around one of Jupiter's stable Lagrange points : either L 4 , existing 60° ahead of the planet in its orbit, or L 5 , 60° behind.
This is a list of Jupiter trojans that lie in the Trojan camp, an elongated curved region around the trailing L 5 Lagrangian point, 60° behind Jupiter in its orbit.. All the asteroids at the trailing L 5 point have names corresponding to participants on the Trojan side of the Trojan War, except for 617 Patroclus, which was named before this naming convention was instituted.
The possibility of a trojan planet to Kepler-91b was studied but the conclusion was that the transit-signal was a false-positive. [4] In April 2023, a group of amateur astronomers reported two new exoplanet candidates co-orbiting, in a horseshoe exchange orbit, close to the star GJ 3470 (this star has a confirmed planet GJ 3470 b). However, the ...
Astronomers spotted a possible “sibling” planet that shares the orbit of another exoplanet in a system located 370 light-years away.
Minor planets in the L 4 and L 5 Sun–Neptune Lagrangian points are called Neptune trojans, with a lower-case t, as "Trojan asteroid" was originally defined as a term for Lagrangian asteroids of Jupiter. Data from: Minor Planet Center
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]
1437 Diomedes / ˌ d aɪ ə ˈ m iː d iː z / is a large Jupiter trojan from the Greek camp, approximately 150 kilometers (90 miles) in diameter.It was discovered on 3 August 1937, by astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. [1]