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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.
These asteroids, while smaller than the dinosaur killer, struck our planet about 25,000 years apart. They left miles-long craters in the Mid-Atlantic Chesapeake Bay and Siberia: the fourth- and ...
[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.
NASA has blasted a spacecraft, traveling at speeds up to 92,000 mph, to the most mysterious asteroids in our solar system.Called the Trojan asteroids, they are trapped in two swarms — one in ...
A small number of asteroids have been found which are co-orbital with Earth. The first of these to be discovered, asteroid 3753 Cruithne, orbits the Sun with a period slightly less than one Earth year, resulting in an orbit that (from the point of view of Earth) appears as a bean-shaped orbit centered on a position ahead of the position of ...
In the moments before NASA's DART spacecraft slammed into the asteroid Dimorphos in a landmark planetary defense test in 2022, it took high-resolution images of this small celestial object and its ...