Electromagnetic perturbations of the orbits of asteroids

Details Electromagnetic perturbations of the orbits of asteroids Electromagnetic perturbations of the orbits of asteroids

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.500..433s&link_type=abstract

In: Proceedings of Asteroids, Comets, Meteors - ACM 2002. International Conference, 29 July - 2 August 2002, Berlin, Germany. Ed

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Minor Planets: Orbits, Perturbations

Scientific paper

There are several distinct forces that may act upon an asteroid due to its interaction with the interplanetary magnetic field. Here the Lorentz, Faraday and eddy current forces are considered and shown to be several orders of magnitude weaker than the radiative forces (radiation pressure, Yarkovsky force). These electromagnetic forces are therefore unlikely to be significant with regard to predictions of terrestrial impacts. Two other points are noted. One is that an electrical current flowing through a small solar system body will cause Joule heating, and it is suggested that this might be the mechanism responsible for some cometary fragmentation events. Secondly, although the eddy current force is small now, in the early solar system it may have been a significant agent causing chemical fractionation, the drag imposed on metal-bearing particles being responsible for them falling into smaller heliocentric orbits.

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