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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.
Astronomers estimate that the Jovian trojans are about as numerous as the asteroids of the asteroid belt. [6] Later on, objects were found orbiting near the Lagrangian points of Neptune, Mars, Earth, [7] Uranus, and Venus. Minor planets at the Lagrangian points of planets other than Jupiter may be called Lagrangian minor planets. [8]
Asteroids in the L 4 and L 5 Sun–Mars Lagrangian points are sometimes called Mars trojans, with a lower-case t, as "Trojan asteroid" was originally defined as a term for Lagrangian asteroids of Jupiter. They may also be called Mars Lagrangian asteroids.
In some ways these asteroids look similar to the near-Earth asteroid ... including a close encounter with another main belt asteroid called Donaldjohanson in 2025. ... There are about 7,000 Trojan ...
"NEO Earth Close-Approaches" (Between 1900 A.D. and 2200 A.D., NEOs with H <=22, nominal distance within 5 LD) – NASA/JPL's Near-Earth Object Program Office "Near Earth Asteroids (NEAs): A Chronology of Milestones" – International Astronomical Union; NEODyS-2 – Near Earth Objects Dynamic Site sponsored by ESA; TECA Table of asteroids next ...
Its movements do not bring it any closer to Earth than 20 million kilometers (12.4 million miles), which is more than 50 times the distance to the Moon. 2010 TK 7 was at the near-Earth end of its tadpole in 2010–2011, [4] which facilitated its discovery. 2010 TK 7 's orbit has a chaotic character, making long-range predictions difficult.
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 ...
Astronomers spotted a possible “sibling” planet that shares the orbit of another exoplanet in a system located 370 light-years away.