Numerical simulations of particle orbits around 2060 Chiron

Details Numerical simulations of particle orbits around 2060 Chiron Numerical simulations of particle orbits around 2060 Chiron

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....107..765s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 107, no. 2, p. 765-771

Astronomy and Astrophysics

Astronomy

9

Astronomical Models, Chiron, Coma, Gravitational Effects, Interplanetary Dust, Light Scattering, Mathematical Models, Orbits, Particle Trajectories, Trajectory Analysis, Computerized Simulation, Dynamic Models, Perihelions

Scientific paper

Scattered light from orbiting or coorbiting dust is a primary signature by which Earth-based observers study the activity and atmosphere of the unusual outer solar system object 2060 Chiron. Therefore, it is important to understand the lifetime, dynamics, and loss rates of dust in its coma. We report here dynamical simulations of particles in Chiron's collisionless coma. The orbits of 17,920 dust particles were numerically integrated under the gravitational influence of Chiron, the Sun, and solar radiation pressure. These simulations show that particles ejected from Chiron are more likely to follow suborbital trajectories, or to escape altogether, than to enter quasistable orbits. Significant orbital lifetimes can only be achieved for very specific launch conditions. These results call into question models of a long-term, bound coma generated by discrete outbursts, and instead suggest that Chiron's coma state is closely coupled to the nearly instantaneous level of Chiron's surface activity.

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