There are about 40,000 studied asteroids that are over 0.5 miles (1 km) in diameter in the asteroid belt. About 3,000 asteroids have been cataloged. The asteroid belt is a doughnut-shaped grouping of asteroids orbiting the sun between the orbits of Mars and Jupiter, closer to the path of Mars. Most of these asteroids orbit from between 186 million to 370 million miles from the sun.
The asteroids in the belt have a slightly elliptical orbit. Asteroids are also described as planetoids or minor planets. The asteroid's surface is rocky or metallic, most of which travel around the sun within the asteroid belt, located between Jupiter and Mars. A few asteroids come close to the sun. None of these asteroids have atmospheres.
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