The Kirkwood Gap at the 2/1 Commensurability With Jupiter: New Numerical Results

Details The Kirkwood Gap at the 2/1 Commensurability With Jupiter: New Numerical Results The Kirkwood Gap at the 2/1 Commensurability With Jupiter: New Numerical Results

Jun 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aj....111.2453m&link_type=abstract

Astronomical Journal v.111, p.2453

Astronomy and Astrophysics

Astronomy

28

Minor Planets, Celestial Mechanics

Scientific paper

In this paper it is pointed out that the 2/i resonance with Jupiter is not completely empty of asteroids. However, among the ten bodies presently in the 2/1 resonance with e<0.5, only four have a quite regular orbit and moderate eccentricity and inclination. The integration of the evolution of the orbits of 24 fictitious particles over 1 Gyr shows that in the 2/i resonance all orbits diffuse chaotically. In some parts of the resonance, however, the diffusion speed is very slow, so that some bodies can survive at least 1 Gyr without becoming Mars crosser. From the global chart of diffusion, some hypotheses are discussed about the origin of the four "regular" asteroids, as well as on the depletion of the Themis family members in the 2/1 resonance.

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