Dynamics of planet-crossing asteroids - Classes of orbital behavior

Details Dynamics of planet-crossing asteroids - Classes of orbital behavior Dynamics of planet-crossing asteroids - Classes of orbital behavior

Apr 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...78..212m&link_type=abstract

Icarus (ISSN 0019-1035), vol. 78, April 1989, p. 212-269. Research sponsored by IBM Corp., CNR, NATO, and Naturvetenskapliga For

Statistics

Computation

122

Asteroids, Computational Astrophysics, Eccentric Orbits, Orbital Mechanics, Orbital Resonances (Celestial Mechanics), Planetary Orbits, Data Bases, Long Term Effects, Numerical Integration, Orbital Elements, Asteroids, Dynamics, Planet Crossers, Orbital Elements, Earth Crossers, Classification, Numerical Methods, Evolution, Timescale, Eccentricity, Orbits, Models, Computer Methods, Geographos Asteroids, Toro Asteroids, Kozai Asteroids, Alinda Asteroids, Eros Asteroids, Oljato Asteroids, Catalog, Parameters,

Scientific paper

The results of the 'SPACEGUARD' numerical integration of 410 planet-crossing asteroid trajectories over the course of 200,000 yr, taking all planets except Mercury and Pluto into account, indicate that the 89 earth-crossing and near-earth-crossing asteroids in the sample can be divided into six well-defined classes of dynamical behavior designated after the best-known object of each class: (1) Geographos, (2) Toro, (3) Alinda, (4) Kozai, (5) Oljato, and (6) Eros. The six SPACEGUARD classes are more stable than the previous Aten-Apollo-Amor classification based on the osculating elements; some transitions are observed, and can be used to describe the evolution of the corresponding populations over longer time-spans.

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