Dynamics, interrelations and evolution of the systems of asteroids and comets

Details Dynamics, interrelations and evolution of the systems of asteroids and comets Dynamics, interrelations and evolution of the systems of asteroids and comets

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980m%26p....22...83k&link_type=abstract

(Laboratorio di Astrofisica Spaziale di Frascati, European Workshop on Planetary Sciences, Rome, Italy, Apr. 23-27, 1979.) Moon

Astronomy and Astrophysics

Astronomy

13

Asteroids, Comets, Orbit Perturbation, Planetary Evolution, Solar System, Dynamic Characteristics, Jupiter (Planet), Solar Orbits

Scientific paper

The dynamics of asteroids and comets is reviewed, with particular emphasis on their evolution and interrelations. The types of observational evidence of the interplanetary bodies now available is considered, noting the selection effects and the possibility of undiscovered types of objects. The relative effects of the various planets on the orbits of minor bodies are assessed, and the dominant role of Jupiter is explained in terms of its mass and location. The solar system is then divided into seven zones with stable or unstable regimes of motion controlled by different objects, and the minor object populations of the individual zones are indicated. Implications of the orbital instabilities identified for the fates of those bodies within them are discussed, and estimates of the lifetimes of the comets and asteroids are presented. Asymmetries in the gravitational evolution of the orbits of asteroids and comets are discussed, and the impossiblity of orbital stabilization or destabilization by purely gravitational forces is pointed out. Possible scenarios for the conversion of nonejected extinct cometary nuclei into asteroid-like objects are then examined.

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