Asteroid debris: Temporary capture and escape orbits |
| |
| Institution: | 1. Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA;2. Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China;3. Colorado Center for Astrodynamics Research, The University of Colorado Boulder, UCB 431, Boulder, CO 80309-0431, United States;4. Department of Computer Science, University of Rochester, Rochester, NY 14627, USA;5. Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA;6. Laboratoire Lagrange, Université Côte d’Azur, Observatoire de la Côte d’Azur,CNRS C.S. 34229, Nice Cedex 4, 06304, France;1. Department of Mathematics, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy;2. Academy of Athens, Research Center of Astronomy and Applied Mathematics, Soranou Efessiou 4, GR-11527 Athens, Greece;3. Department of Physics, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Rome, Italy;1. Department of Aerospace Science and Technology, Politecnico di Milano, Via la Masa 34, Milan, 20156, Italy;2. Research Center for Astronomy, Academy of Athens, Soranou Efessiou 4, Athens, 11527, Greece;3. Department of Mathematics, University of Rome, Tor Vergata, Via della Ricerca Scientifica 1, Rome, 00133, Italy;4. Department of Physics, University of Rome, Tor Vergata, Via della Ricerca Scientifica 1, Rome, 00133, Italy |
| |
| Abstract: | We investigate the dynamical behaviour of debris ejected from the surface of an asteroid, due to a generic – natural or artificial – surface process. We make an extensive statistical study of the dynamics of particles flowing from the asteroid. We observe different behaviours: particles which fall again on the asteroid surface, or rather escape from its gravitational field or are temporary trapped in orbit around the asteroid. The tests are made by varying different parameters, like the size of the asteroid, its eccentricity, the angular velocity of the asteroid, the area-to-mass ratio of the debris.We also extend the study to the case of a sample of binary asteroids with a mass ratio equal to 10?3; we vary the distance of the moonlet from the asteroid, to see its effect on the debris dynamics.Our simulations aim to identify regions where the debris can temporarily orbit around the asteroid or rather escape from it or fall back on the surface. These results give an important information on where a spacecraft could be safely stay after the end of the process which has produced the debris. |
| |
| Keywords: | Asteroid debris Perturbed four body problem Lyapunov exponents Temporary capture |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
