Slow Diffusion and Effective Stability of Dust Particles Orbiting Asteroids

Details Slow Diffusion and Effective Stability of Dust Particles Orbiting Asteroids Slow Diffusion and Effective Stability of Dust Particles Orbiting Asteroids

Sep 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cemda..84....1d&link_type=abstract

Celestial Mechanics and Dynamical Astronomy, v. 84, Issue 1, p. 1-25 (2002).

Astronomy and Astrophysics

Astronomy

1

Radiation Pressure, Restricted Three-Body Problem, Persistent Periodic Orbits, Normal-Form Transformations, Effective Stability

Scientific paper

This paper presents quantitative estimates of orbital lifetimes for small dust particles in the vicinity of a spherical asteroid orbiting the Sun on a circular orbit. In particular, the modeling accounts for gravitational interactions with the asteroid and the Sun and radiation pressure from the Sun. The analysis focuses on slow drift of particles in a state-space neighborhood of weakly unstable periodic orbits corresponding to the most tightly bound orbits about the asteroid. Through a Hamiltonian normal-form computation, Nekhoroshev-type estimates are derived that yield regions in state space of effective stability, that is, regions in which the grains would remain over significant periods of time in the absence of other depletion and replenishment mechanisms.

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