Trojan asteroids


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Related to Trojan asteroids: Apollo asteroids

Trojan asteroids,

asteroidsasteroid,
 planetoid,
or minor planet,
small body orbiting the sun. More than 300,000 asteroids have been identified and cataloged; more than a million are believed to exist in the main belt between Mars and Jupiter, with many more in the Kuiper belt
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 that revolve about the sun in the same orbit as a planet, occupying stable positions (known as Lagrangian points) either about 60° ahead of the planet in the orbit or about 60° behind it. Such asteroids were first discovered (1906) in Jupiter's orbit. In 1990, a similar asteroid, Eureka, was found in the orbit of Mars, and several others have since been discovered. Similar asteroids also have been found in Neptune's orbit since 2001, and a Trojan asteroid in earth's orbit was confirmed in 2011.

The Trojan asteroids represent one possible special solution to the famous three-body problem (see also celestial mechanicscelestial mechanics,
the study of the motions of astronomical bodies as they move under the influence of their mutual gravitation. Celestial mechanics analyzes the orbital motions of planets, dwarf planets, comets, asteroids, and natural and artificial satellites within the
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), with each group forming an equilateral triangle with the planet whose orbit they share and the sun. Some Trojan asteroids are composed of ice and dirt, rather than rock, making it possible that they are captured comets. The first Trojan asteroid discovered was Achilles, observed by the German astronomer Max Wolf; all of Jupiter's Trojan asteroids are named for heroes of the Trojan WarTrojan War,
in Greek mythology, war between the Greeks and the people of Troy. The strife began after the Trojan prince Paris abducted Helen, wife of Menelaus of Sparta. When Menelaus demanded her return, the Trojans refused.
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.

References in periodicals archive ?
28 ( ANI ): Researchers have said that exotic orbit for the largest Trojan asteroid, (624) Hektor-the only one known to possess a moon, may be products of the collision of two icy asteroids.
The mysterious origins and our limited compositional information about the Trojan asteroids are why NASA has prioritized the Jupiter Trojans for a spacecraft mission of the Discovery (small budget) or New Frontiers (medium budget) class in the very near future.
Other planets were later found to have Trojan asteroids riding along with them too, such as Mars, Neptune and even Earth, where WISE recently found the first known Earth Trojan:
Washington, Jan 25 ( ANI ): Researchers have created a precise model of part of the solar system, in which an electron in an atom orbits the nucleus in exactly the same way as Jupiter's Trojan asteroids orbit the sun.
Alternatively, notes Jewitt, the four bodies may rank as the first Trojan asteroids found near Neptune.
Lucy will launch in October 2021 and will visit the Trojan asteroids that circulate around Jupiter, while Psyche, which will launch in 2023, will study a unique metal asteroid, NASA says.
When fast movers (near-Earth objects) or slow movers (Jupiter Trojan asteroids or KBOs) are found, additional follow-up support comes from the Magdalena Ridge Observatory located in Socorro, New Mexico.
After IKAROS, JAXA plans to build a 50-metre-diameter sail that would launch in the late 2010s and cruise to Jupiter and the Trojan asteroids.
It's been asked to keep an eye out for Trojan asteroids close to the home planet.
We explain Jupiter's Trojan asteroids and we make the irregular satellites and we get the right orbital-element distribution in the Kuiper Belt," says Levison.
London, July 31 (ANI): Material from the Trojan asteroids that exist around the orbit of Neptune could go on to become comets that could strike our planet, according to a new study.