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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.
2010 TK 7 was confirmed to be the first known Earth trojan in 2011. It is located in the L 4 Lagrangian point, which lies ahead of the Earth. [14] (614689) 2020 XL 5 was found to be another Earth trojan in 2021. It is also at L4. [15] [16] (687170) 2011 QF 99 was identified as the first Uranus trojan in 2013. It is located at the L 4 Lagrangian ...
Asteroid (614689) 2020 XL 5 is the second Earth trojan, confirmed in November 2021, oscillating around L 4 in a tadpole orbit and expected to remain there for at least 4000 years, until destabilized by Venus.
[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.
In some ways these asteroids look similar to the near-Earth asteroid binary Didymos and Dimorphos that DART saw, ... There are about 7,000 Trojan asteroids, and the largest is 160 miles (257 ...
(614689) 2020 XL 5 (provisional designation 2020 XL 5) is a near-Earth asteroid and Earth trojan discovered by the Pan-STARRS 1 survey at Haleakala Observatory, Hawaii on 12 December 2020. It oscillates around the Sun – Earth L 4 Lagrangian point (leading 60°), one of the dynamically stable locations where the combined gravitational force ...
Astronomers spotted a possible “sibling” planet that shares the orbit of another exoplanet in a system located 370 light-years away.
VLT/SPHERE images of most asteroids > 210 km in diameter to scale. Deconvolved with MISTRAL algorithm. Main-belt asteroids > 200 km that were not imaged are (451) Patientia, (65) Cybele and (107) Camilla. Trojan (624) Hektor may also be in this size range. VLT/SPHERE images of a large number of asteroids 100 to 210 km in diameter, to scale.