What is an asteroid? Where are most located?

When our star Sun was young, small countless planetesimals

orbiting coalesced, conjoined and aggregated to form

bigger planetoids, larger midget planets and very large

planets..

Smaller starfish like rocky planetoids are called asteroids

Most of the known asteroids are orbiting the Sun, in-between the

orbits of Mars and Jupiter..

Sans satellites and rings of their own system, by definition,

planets had cleared such smaller orbiters, at the least, in

the space between (nearest-to-Sun) perihelion and ( farthest-from-

Sun ) aphelion.

Very large Ceres, recent discovery Vesta and very massive Apophis

are notable, among the innumerable asteroids.