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Jupiter trojan

Index Jupiter trojan

The Jupiter trojans, commonly called Trojan asteroids or just Trojans, are a large group of asteroids that share the planet Jupiter's orbit around the Sun. [1]

89 relations: Achilles, Albedo, Ancient Greece, Asteroid, Asteroid belt, Asteroid family, August Kopff, Binary star, C-type asteroid, Calvin College, Charcoal, Co-orbital configuration, Collisional family, Comet, Comet nucleus, Comet Shoemaker–Levy 9, Contact binary (small Solar System body), D-type asteroid, Discovery Program, Earth trojan, Edward Emerson Barnard, Five-planet Nice model, Formation and evolution of the Solar System, Geometric albedo, Hector, Heidelberg-Königstuhl State Observatory, Helium, Hill sphere, Horseshoe orbit, Hydrogen, Johann Palisa, Joseph-Louis Lagrange, Jumping-Jupiter scenario, Jupiter, Kuiper belt, Lagrangian point, Libration, Light curve, List of Jupiter trojans (Greek camp), List of Jupiter trojans (Trojan camp), List of Jupiter-crossing minor planets, List of objects at Lagrangian points, Lucy (spacecraft), Magnesium, Mars trojan, Max Wolf, Maxwell–Boltzmann distribution, Median, Minor-planet moon, Minute and second of arc, ..., Monthly Notices of the Royal Astronomical Society, Moons of Saturn, NASA, Neptune, Neptune trojan, Nice model, OKEANOS, Orbital inclination, Orbital resonance, Order of magnitude, P-type asteroid, Patroclus, Phoebe (moon), Planetary migration, Planetesimal, Protoplanetary disk, Saturn, Semi-major and semi-minor axes, Silicate, Small Solar System body, Solar sail, Solar System, Spectroscopy, Spectrum, Statistical dispersion, Sun, Tholin, Three-body problem, Trojan (astronomy), Trojan War, Troy, Uranus, Vienna, W. M. Keck Observatory, 4709 Ennomos, 588 Achilles, 617 Patroclus, 624 Hektor, 911 Agamemnon. Expand index (39 more) »


In Greek mythology, Achilles or Achilleus (Ἀχιλλεύς, Achilleus) was a Greek hero of the Trojan War and the central character and greatest warrior of Homer's Iliad.

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Albedo (albedo, meaning "whiteness") is the measure of the diffuse reflection of solar radiation out of the total solar radiation received by an astronomical body (e.g. a planet like Earth).

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Ancient Greece

Ancient Greece was a civilization belonging to a period of Greek history from the Greek Dark Ages of the 13th–9th centuries BC to the end of antiquity (AD 600).

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Asteroids are minor planets, especially those of the inner Solar System.

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Asteroid belt

The asteroid belt is the circumstellar disc in the Solar System located roughly between the orbits of the planets Mars and Jupiter.

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Asteroid family

An asteroid family is a population of asteroids that share similar proper orbital elements, such as semimajor axis, eccentricity, and orbital inclination.

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August Kopff

August Kopff (February 5, 1882 – April 25, 1960) was a German astronomer and discoverer of several comets and asteroids.

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Binary star

A binary star is a star system consisting of two stars orbiting around their common barycenter.

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C-type asteroid

C-type (carbonaceous) asteroids are the most common variety, forming around 75% of known asteroids.

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Calvin College

Calvin College is a liberal arts college located in Grand Rapids, Michigan.

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Charcoal is the lightweight black carbon and ash residue hydrocarbon produced by removing water and other volatile constituents from animal and vegetation substances.

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Co-orbital configuration

In astronomy, a co-orbital configuration is a configuration of two or more astronomical objects (such as asteroids, moons, or planets) orbiting at the same, or very similar, distance from their primary, i.e. they are in a 1:1 mean-motion resonance.

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Collisional family

In astronomy, a collisional family is a group of objects that are thought to have a common origin in an impact (collision).

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A comet is an icy small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process called outgassing.

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Comet nucleus

The nucleus is the solid, central part of a comet, popularly termed a dirty snowball or an icy dirtball.

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Comet Shoemaker–Levy 9

Comet Shoemaker–Levy 9 (formally designated D/1993 F2) was a comet that broke apart in July 1992 and collided with Jupiter in July 1994, providing the first direct observation of an extraterrestrial collision of Solar System objects.

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Contact binary (small Solar System body)

A contact binary is a small Solar System body that is composed of two bodies that have gravitated toward each other until they touch.

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D-type asteroid

D-type asteroids have a very low albedo and a featureless reddish spectrum.

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Discovery Program

NASA's Discovery Program is a series of lower-cost (as compared to New Frontiers or Flagship Programs), highly focused American scientific space missions that are exploring the Solar System.

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Earth trojan

An Earth trojan is an asteroid that orbits the Sun in the vicinity of the Earth–Sun Lagrangian points (leading 60°) or (trailing 60°), thus having an orbit similar to Earth's.

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Edward Emerson Barnard

Edward Emerson Barnard (December 16, 1857 – February 6, 1923) was an American astronomer.

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Five-planet Nice model

The five-planet Nice model is a recent variation of the Nice model that begins with five giant planets, the current four plus an additional ice giant, in a chain of mean-motion resonances.

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Formation and evolution of the Solar System

The formation and evolution of the Solar System began 4.6 billion years ago with the gravitational collapse of a small part of a giant molecular cloud.

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Geometric albedo

In astronomy, the geometric albedo of a celestial body is the ratio of its actual brightness as seen from the light source (i.e. at zero phase angle) to that of an idealized flat, fully reflecting, diffusively scattering (Lambertian) disk with the same cross-section.

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In Greek mythology and Roman mythology, Hector (Ἕκτωρ Hektōr) was a Trojan prince and the greatest fighter for Troy in the Trojan War.

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Heidelberg-Königstuhl State Observatory

Heidelberg-Königstuhl State Observatory (Landessternwarte Heidelberg-Königstuhl) is a historic astronomical observatory located near the summit of the Königstuhl hill in the city of Heidelberg in Germany.

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Helium (from lit) is a chemical element with symbol He and atomic number 2.

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Hill sphere

An astronomical body's Hill sphere is the region in which it dominates the attraction of satellites.

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Horseshoe orbit

A horseshoe orbit is a type of co-orbital motion of a small orbiting body relative to a larger orbiting body (such as Earth).

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Hydrogen is a chemical element with symbol H and atomic number 1.

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Johann Palisa

Johann Palisa (December 6, 1848 – May 2, 1925) was an Austrian astronomer, born in Troppau in Austrian Silesia (now in the Czech Republic).

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Joseph-Louis Lagrange

Joseph-Louis Lagrange (or;; born Giuseppe Lodovico Lagrangia, Encyclopædia Britannica or Giuseppe Ludovico De la Grange Tournier, Turin, 25 January 1736 – Paris, 10 April 1813; also reported as Giuseppe Luigi Lagrange or Lagrangia) was an Italian Enlightenment Era mathematician and astronomer.

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Jumping-Jupiter scenario

The jumping-Jupiter scenario specifies an evolution of giant-planet migration described by the Nice model, in which an ice giant (Uranus, Neptune, or an additional Neptune-mass planet) is scattered inward by Saturn and outward by Jupiter, causing the step-wise separation of their orbits.

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Jupiter is the fifth planet from the Sun and the largest in the Solar System.

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Kuiper belt

The Kuiper belt, occasionally called the Edgeworth–Kuiper belt, is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune (at 30 AU) to approximately 50 AU from the Sun.

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Lagrangian point

In celestial mechanics, the Lagrangian points (also Lagrange points, L-points, or libration points) are positions in an orbital configuration of two large bodies, wherein a small object, affected only by the gravitational forces from the two larger objects, will maintain its position relative to them.

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In astronomy, libration is a perceived oscillating motion of orbiting bodies relative to each other, notably including the motion of the Moon relative to Earth, or of trojan asteroids relative to planets.

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Light curve

In astronomy, a light curve is a graph of light intensity of a celestial object or region, as a function of time.

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List of Jupiter trojans (Greek camp)

This is a list of Jupiter trojans that lie in the Greek camp, an elongated, curved region around the leading Lagrangian point, 60° ahead of Jupiter's orbit.

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List of Jupiter trojans (Trojan camp)

This is a list of Jupiter trojans that lie in the Trojan camp, an elongated, curved region around the trailing Lagrangian point 60° behind Jupiter.

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List of Jupiter-crossing minor planets

A Jupiter-crosser is a minor planet whose orbit crosses that of Jupiter.

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List of objects at Lagrangian points

This is a list of known objects which occupy, have occupied, or are planned to occupy any of the five Lagrangian points of two-body systems in space.

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Lucy (spacecraft)

Lucy is a planned NASA space probe that will tour five Jupiter trojans, asteroids which share Jupiter's orbit around the Sun, orbiting either ahead of or behind the planet.

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Magnesium is a chemical element with symbol Mg and atomic number 12.

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Mars trojan

The Mars trojans are a group of objects that share the orbit of the planet Mars around the Sun.

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Max Wolf

Maximilian Franz Joseph Cornelius "Max" Wolf (June 21, 1863 – October 3, 1932) was a German astronomer and a pioneer in the field of astrophotography.

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Maxwell–Boltzmann distribution

In physics (in particular in statistical mechanics), the Maxwell–Boltzmann distribution is a particular probability distribution named after James Clerk Maxwell and Ludwig Boltzmann.

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The median is the value separating the higher half of a data sample, a population, or a probability distribution, from the lower half.

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Minor-planet moon

A minor-planet moon is an astronomical object that orbits a minor planet as its natural satellite.

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Minute and second of arc

A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to of one degree.

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Monthly Notices of the Royal Astronomical Society

Monthly Notices of the Royal Astronomical Society (MNRAS) is a peer-reviewed scientific journal covering research in astronomy and astrophysics.

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Moons of Saturn

The moons of Saturn are numerous and diverse, ranging from tiny moonlets less than 1 kilometer across to the enormous Titan, which is larger than the planet Mercury.

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The National Aeronautics and Space Administration (NASA) is an independent agency of the executive branch of the United States federal government responsible for the civilian space program, as well as aeronautics and aerospace research.

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Neptune is the eighth and farthest known planet from the Sun in the Solar System.

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Neptune trojan

Neptune trojans are bodies that orbit the Sun near one of the stable Lagrangian points of Neptune, similar to the trojans of other planets.

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Nice model

The Nice model is a scenario for the dynamical evolution of the Solar System.

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OKEANOS (Outsized Kite-craft for Exploration and Astronautics in the Outer Solar System) is a proposed mission concept to Jupiter's Trojan asteroids using a hybrid solar sail for propulsion; the sail is covered with thin solar panels to power an ion engine.

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Orbital inclination

Orbital inclination measures the tilt of an object's orbit around a celestial body.

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Orbital resonance

In celestial mechanics, an orbital resonance occurs when orbiting bodies exert a regular, periodic gravitational influence on each other, usually because their orbital periods are related by a ratio of small integers.

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Order of magnitude

An order of magnitude is an approximate measure of the number of digits that a number has in the commonly-used base-ten number system.

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P-type asteroid

P-type asteroids have low albedo and a featureless reddish spectrum.

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In Greek mythology, as recorded in Homer's Iliad, Patroclus (Πάτροκλος, Pátroklos, "glory of the father") was the son of Menoetius, grandson of Actor, King of Opus.

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Phoebe (moon)

Phoebe (Greek: Φοίβη Phoíbē) is an irregular satellite of Saturn with a mean diameter of 213 km.

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Planetary migration

Planetary migration occurs when a planet or other stellar satellite interacts with a disk of gas or planetesimals, resulting in the alteration of the satellite's orbital parameters, especially its semi-major axis.

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Planetesimals are solid objects thought to exist in protoplanetary disks and in debris disks.

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Protoplanetary disk

A protoplanetary disk is a rotating circumstellar disk of dense gas and dust surrounding a young newly formed star, a T Tauri star, or Herbig Ae/Be star.

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Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter.

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Semi-major and semi-minor axes

In geometry, the major axis of an ellipse is its longest diameter: a line segment that runs through the center and both foci, with ends at the widest points of the perimeter.

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In chemistry, a silicate is any member of a family of anions consisting of silicon and oxygen, usually with the general formula, where 0 ≤ x Silicate anions are often large polymeric molecules with an extense variety of structures, including chains and rings (as in polymeric metasilicate), double chains (as in, and sheets (as in. In geology and astronomy, the term silicate is used to mean silicate minerals, ionic solids with silicate anions; as well as rock types that consist predominantly of such minerals. In that context, the term also includes the non-ionic compound silicon dioxide (silica, quartz), which would correspond to x.

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Small Solar System body

A small Solar System body (SSSB) is an object in the Solar System that is neither a planet, nor a dwarf planet, nor a natural satellite.

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Solar sail

Solar sails (also called light sails or photon sails) are a proposed method of spacecraft propulsion using radiation pressure exerted by sunlight on large mirrors.

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Solar System

The Solar SystemCapitalization of the name varies.

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Spectroscopy is the study of the interaction between matter and electromagnetic radiation.

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A spectrum (plural spectra or spectrums) is a condition that is not limited to a specific set of values but can vary, without steps, across a continuum.

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Statistical dispersion

In statistics, dispersion (also called variability, scatter, or spread) is the extent to which a distribution is stretched or squeezed.

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The Sun is the star at the center of the Solar System.

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Tholins (after the Greek θολός (tholós) "hazy" or "muddy"; from the ancient Greek word meaning "sepia ink") are a wide variety of organic compounds formed by solar ultraviolet irradiation or cosmic rays from simple carbon-containing compounds such as carbon dioxide, methane or ethane, often in combination with nitrogen.

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Three-body problem

In physics and classical mechanics, the three-body problem is the problem of taking an initial set of data that specifies the positions, masses, and velocities of three bodies for some particular point in time and then determining the motions of the three bodies, in accordance with Newton's laws of motion and of universal gravitation, which are the laws of classical mechanics.

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Trojan (astronomy)

In astronomy, a trojan is a minor planet or moon that shares the orbit of a planet or larger moon, wherein the trojan remains in the same, stable position relative to the larger object.

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Trojan War

In Greek mythology, the Trojan War was waged against the city of Troy by the Achaeans (Greeks) after Paris of Troy took Helen from her husband Menelaus, king of Sparta.

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Troy (Τροία, Troia or Τροίας, Troias and Ἴλιον, Ilion or Ἴλιος, Ilios; Troia and Ilium;Trōia is the typical Latin name for the city. Ilium is a more poetic term: Hittite: Wilusha or Truwisha; Truva or Troya) was a city in the far northwest of the region known in late Classical antiquity as Asia Minor, now known as Anatolia in modern Turkey, near (just south of) the southwest mouth of the Dardanelles strait and northwest of Mount Ida.

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Uranus is the seventh planet from the Sun.

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Vienna (Wien) is the federal capital and largest city of Austria and one of the nine states of Austria.

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W. M. Keck Observatory

The W. M. Keck Observatory is a two-telescope astronomical observatory at an elevation of 4,145 meters (13,600 ft) near the summit of Mauna Kea in the U.S. state of Hawaii.

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4709 Ennomos

4709 Ennomos, provisional designation, is a large Jupiter trojan from the Trojan camp and the namesake of the small Ennomos family, approximately in diameter.

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588 Achilles

588 Achilles, provisional designation, is a large Jupiter trojan from the Greek camp, and the first of its kind discovered by Max Wolf at the Heidelberg Observatory in 1906, who named it after the legendary hero Achilles from Greek mythology.

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617 Patroclus

617 Patroclus, provisional designation is a binary Jupiter trojan approximately in diameter.

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624 Hektor

624 Hektor is the largest Jupiter trojan and the namesake of the Hektor family, with a highly elongated shape equivalent in volume to a sphere of approximately 225 to 250 kilometers diameter. It was discovered on 10 February 1907, by astronomer August Kopff at Heidelberg Observatory in southwest Germany, and named after the Trojan prince Hector, from Greek mythology. It has one small 12-kilometer sized satellite, Skamandrios, discovered in 2006.

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911 Agamemnon

911 Agamemnon, provisional designation, is a large Jupiter trojan and a suspected binary asteroid from the Greek camp, approximately in diameter.

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Redirects here:

Greeks asteroid, Jovian trojan, Jovian trojans, Jupiter Trojan, Jupiter trojans, Trojan group, Trojans asteroid.


[1] https://en.wikipedia.org/wiki/Jupiter_trojan

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