Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003nea..conf...87i&link_type=abstract
Near-Earth Astronomy - 2003 (NEA-2003), Proceedings of the international conference, held 8-13 September, 2003, Terskol, Russia.
Astronomy and Astrophysics
Astronomy
Trans-Neptunian Objects, Planetesimals, Near-Earth Objects, Orbital Evolution, Comets, Dynamical Lifetimes, Numerical Integration
Scientific paper
Many large trans-Neptunian objects (TNOs) could be formed by the compression of rarefied dust condensations, but not by the accumulation of smaller solid planetesimals. As migration of TNOs to Jupiter's orbit was investigated by several authors, we have made series of runs of the orbital evolution of more than 25000 Jupiter-crossing objects under the gravitational influence of planets. Results of our runs testify in favor of at least one of these conclusions: 1) the portion of 1-km former TNOs among near-Earth objects (NEOs) can exceed several tens of percents, 2) the number of TNOs migrating inside solar system can be smaller by a factor of several than it was earlier considered, 3) most of 1-km former TNOs that had got NEO orbits disintegrated into mini-comets and dust during a smaller part of their dynamical lifetimes if these lifetimes are not small.
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