The graph shows the distribution of asteroids in the solar system with its eccentricity. The majority of all asteroids our solar system (main belt) are 2.0 to 3.4 AU, where a well in the diagram higher incidence is.
At about 1.5 AU, the Mars Trojans are followed by several asteroids groups from 1.9 to 3.5 AU (Ceres is about 2.77 AU). Below are still the Hilda group is in approximately 3.9 to 4.0 AU, and finally the Jupiter Trojans in approximately 5.1 to 5.3 AU.
On the outside, the Kuiper Belt is about 30 to 50 AU. By about 30 AU are the Neptune Trojans. About the Kuiper Belt beyond are still some objects in the so-called Scattered Disk (SDOs) of about 50 to 74 AU.