Computer Science – Numerical Analysis
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996eiaf.conf...17m&link_type=abstract
Workshop on Evolution of Igneous Asteroids: Focus on Vesta and the HED Meterorites, p. 17
Computer Science
Numerical Analysis
Asteroids, Numerical Analysis, Reflectance, Vesta Asteroid, Ejecta, Resonance
Scientific paper
We have for the first time performed an extensive numerical analysis of the orbital evolution of fragments possibly ejected from 4 Vesta as a consequence of the event that created the dynamical family associated with this asteroid. It was shown in the past that V-type plausible fragments from 4 Vesta actually make a bridge between the location of the family and both the 3:1 mean-motion resonance with Jupiter and the v6 secular resonance. Moreover, three Near Earth Asteroids (NEAs) (3551 Verenia, 3908 1980 PA, and 4055 Magellan) have been found to exhibit reflectance spectra typical of V-type asteroids. Using a procedure recently developed in order to reconstruct the original velocity field of the fragments from family-forming events, we have derived the most plausible features of the original event. Accordingly, we have generated a number of fictitious fragments originating from this family. In particular, we considered 125 fragments ejected into the 3:1 resonance, and 55 ejected into the v6 secular resonance. The dynamical evolution of these objects has been computed through numerical integrations spanning about 4 million years Moreover, the orbits of the three V-type NEAs mentioned above, as well as five fictitious "clones" for each of them, have also been integrated over the same time span. In the case of 4055 Magellan and its five clones, the integration was carried out over 107 year. In spite of the fact that the time span of our integrations is not very long we find some interesting and surprising results.
Cellino Alberto
Migliorini Fabbio
Morbidelli Alessandro
Zappala Vincent
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