asteroid belt


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Related to asteroid belt: Kuiper belt

asteroid belt

(main belt) The zone near to the plane of the ecliptic and between the orbits of Mars and Jupiter that contains the majority of asteroids, known as main-belt asteroids. The edges are well-defined at distances from the Sun of about 1.7 and 4.0 AU respectively and the orbits are strongly concentrated in the plane of the ecliptic. Even so, the individual asteroids in the main belt are widely spaced. The orbital inclination becomes more scattered on moving through the belt. The average inclination is about 10° and the average eccentricity is 0.15. All the bodies are in direct motion. Occasional collisions between asteroids occur at velocities of about 5 km s–1. See also Kirkwood gaps.

asteroid belt

[′as·tə‚rȯid ‚belt]
(astronomy)
The region between 2.1 and 3.5 astronomical units from the sun where most of the asteroids are found.
References in periodicals archive ?
Although Vesta and Ceres reside in the same general area, which is the asteroid belt, the two targets are very different, in terms of geology.
Dawn became the only spacecraft ever to orbit a cosmic body in the main asteroid belt between Mars and Jupiter in 2011 when it began circling the asteroid Vesta.
Even though Vesta is the second-largest body in the Main Asteroid Belt, it still is small enough not to have been molded into a sphere by the pull of its own gravity, and it has retained its status as an asteroid.
It's headed not only toward Mars but almost to the dwarf planet Ceres in the asteroid belt.
The images of 288P, which is located in the asteroid belt between Mars and Jupiter, revealed that it was actually not a single object, but two asteroids of almost the same mass and size, orbiting each other at a distance of about 100 kilometres.
Even though the asteroid belt contains more than a billion asteroids measuring over a mile long, the belt is not as crowded a region as you might think.
Lead author Michael Kuppers of ESA in Spain, said that this is the first time water vapor has been unequivocally detected on Ceres or any other object in the asteroid belt and provides proof that Ceres has an icy surface and an atmosphere.
SEDGEFIELD: GAZETTE BET: 1.50 Asteroid Belt. NAOMI MATTHEW: 12.20 My Flora, 12.50 Witness In Court, 1.20 Crafti Bookie, 1.50 Bab Al Salam, 2.20 Ouest Eclair, 2.50 Old Magic, 3.20 Fortyscore.
This meteor almost certainly came from the asteroid belt, which is between Mars and Jupiter.
Astronomers believe YU 55 has been visiting Earth for thousands of years, nudged out of the main asteroid belt between Mars and Jupiter after a gravitational elbowing by Jupiter.