SP-345 Evolution of the Solar System

FIGURE 4.3.4.- The (M, a) diagram (mass of asteroids in g per 0.01 AU as a function of semimajor axis a in AU).

 

FIGURE 4.3.4.- The (M, a) diagram (mass of asteroids in g per 0.01 AU as a function of semimajor axis a in AU). To stress the logarithmic scale, the region of greatest mass density is shaded. These regions contain practically all the mass in the asteroid belt. Mass was calculated from magnitude using eq. (4.3.3). The diagram includes data for all asteroids of a < 5.0 AU listed in the Ephemerides of Minor Planets for 1968. The resonances are indicated as the ratio of the orbital period of a body at a specific value of a to the orbital period of Jupiter. The Kirkwood gaps correspond to the 1/3, 2/5, 3/7, and 1/2 resonances. (From Alfvén et al, 1974.)

 
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