Lifetime of binary asteroids versus gravitational encounters and collisions

Details Lifetime of binary asteroids versus gravitational encounters and collisions Lifetime of binary asteroids versus gravitational encounters and collisions

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acm..proc..113c&link_type=abstract

In Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991 p 113-116 (SEE N93-19113 06-90)

Astronomy and Astrophysics

Astronomy

Asteroid Belts, Asteroids, Astronomical Models, Collisions, Energy Transfer, Geochronology, Particle Interactions, Planetary Evolution, Random Walk, Two Body Problem, Encounters, Estimating

Scientific paper

We investigate the effect on the dynamics of a binary asteroid in the case of a near encounter with a third body. The dynamics of the binary is modeled as a two-body problem perturbed by an approaching body in the following ways: near encounters and collisions with a component of the system. In each case, the typical value of the two-body energy variation is estimated, and a random walk for the cumulative effect is assumed. Results are applied to some binary asteroid candidates. The main conclusion is that the collisional disruption is the dominant effect, giving lifetimes comparable to or larger than the age of the solar system.

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