SP-345 Evolution of the Solar System

 

FIGURE 4.3.3.- The (N, a) diagram (number of asteroids as a function of semimajor axis).

 

FIGURE 4.3.3.- The (N, a) diagram (number of asteroids as a function of semimajor axis). Most asteroids are located between 2.1 and 8.3 AU, constituting the main belt. The groups at 1.9, 3.9, and 5.2 AU are the Hungaria, Hilda, and Trojan asteroids, respectively. The sharp minima in the main belt are the Kirkwood gaps which occur at the 1/3, 2/5, 3/7, and 1/2 resonances of Jupiter.

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