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Information about Trojan (astronomy)

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Trojan asteroids of Jupiter (coloured green) in front of and behind Jupiter along its orbital path. Also shown is the main asteroid belt between the orbits of Mars and Jupiter (white) and the Hilda family of asteroids (brown)
In astronomy, the adjective Trojan refers to asteroids or moons that share the same orbit as a larger planet or moon, but does not collide because it orbits within one of the two Lagrangian points of stability, L4 and L5, which results in it always orbiting 60° ahead of or behind the larger object.

The term originally referred to asteroids orbiting in Jupiter's Lagrangian points. Now, other objects have been found orbiting in the Lagrangian points of other planets. In addition, Trojan moons orbit in the Lagrangian points of some of Saturn's larger moons.

References

1. ^ List of Martian Trojans. Retrieved on 2007-08-31.
2. ^ List of Neptune Trojans. Retrieved on 2007-08-31.

See also

Lagrangian points (pronounced [ləˈgɹɒɲ.dʒi.ən] or [laˈgʀɑ̃.
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Jupiter  

This processed color image of Jupiter was produced in 1990 by the U.S. Geological Survey from a Voyager image captured in 1979. The colors have been enhanced to bring out detail.
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A Trojan moon is a natural satellite of a planet occupying the L4 or L5 equilateral Lagrangian points of a primary-moon system. They are named by analogy with the Trojan asteroids, which occupy the L4 and L5
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Saturn  

Saturn, as seen by Cassini
Orbital characteristics[1][2]
Epoch J2000
Aphelion distance: 1,513,325,783 km
10.11595804 AU
Perihelion distance: 1,353,572,956 km
9.
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Trojan asteroids are a large group of objects that share the orbit of the planet Jupiter around the Sun. Viewed from a coordinate system that is fixed on Jupiter, they appear to orbit one of the two Lagrangian points of stability, L4 and L5
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5261 Eureka
Discovery
Discovered by: David H. Levy
Discovery date: June 20, 1990
Orbital characteristics
Epoch July 14, 2004 (JD 2453200.5)
Aphelion distance: 242.684 Gm (1.622 AU)
Perihelion distance: 213.132 Gm (1.
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    As of March 2007, there are five[1] known Neptune Trojans (named by analogy to the Trojan asteroids) which have the same orbital period as the planet.[2] They lie in the elongated, curved region around the L4
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    A Trojan moon is a natural satellite of a planet occupying the L4 or L5 equilateral Lagrangian points of a primary-moon system. They are named by analogy with the Trojan asteroids, which occupy the L4 and L5
    ..... Click the link for more information.
    Saturn  

    Saturn, as seen by Cassini
    Orbital characteristics[1][2]
    Epoch J2000
    Aphelion distance: 1,513,325,783 km
    10.11595804 AU
    Perihelion distance: 1,353,572,956 km
    9.
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    This is a list of known objects which have been, are or are planned to occupy any of the five Lagrangian points of two-body systems in space.

    Sun-Earth Lagrangian points

    L1

    L1
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    Lagrangian points (pronounced [ləˈgɹɒɲ.dʒi.ən] or [laˈgʀɑ̃.
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    A Trojan planet is a theoretical planet orbiting in the lagrange point of a star and a massive orbiting body, a gas giant or potentially a smaller companion star.

    See also

    • Trojan asteroid
    • Trojan moon
    • Trojan (astronomy)

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    A Trojan moon is a natural satellite of a planet occupying the L4 or L5 equilateral Lagrangian points of a primary-moon system. They are named by analogy with the Trojan asteroids, which occupy the L4 and L5
    ..... Click the link for more information.
    Trojan asteroids are a large group of objects that share the orbit of the planet Jupiter around the Sun. Viewed from a coordinate system that is fixed on Jupiter, they appear to orbit one of the two Lagrangian points of stability, L4 and L5
    ..... Click the link for more information.


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