Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-03-11
Astronomy and Astrophysics
Astrophysics
Proc. of the international conference "New trends in astrodynamics and applications" (20-22 January 2003, University of Maryla
Scientific paper
We estimated the rate of comet and asteroid collisions with the terrestrial planets by calculating the orbits of 13000 Jupiter-crossing objects (JCOs) and 1300 resonant asteroids and computing the probabilities of collisions based on random-phase approximations and the orbital elements sampled with a 500 yr step. The Bulirsh-Stoer and a symplectic orbit integrator gave similar results for orbital evolution, but sometimes give different collision probabilities with the Sun. A small fraction of former JCOs reached orbits with aphelia inside Jupiter's orbit, and some reached Apollo orbits with semi-major axes less than 2 AU, Aten orbits, and inner-Earth orbits (with aphelia less than 0.983 AU) and remained there for millions of years. Though less than 0.1% of the total, these objects were responsible for most of the collision probability of former JCOs with Earth and Venus. Some Jupiter-family comets can reach inclinations i>90 deg. We conclude that a significant fraction of near-Earth objects could be extinct comets that came from the trans-Neptunian region.
Ipatov Sergei I.
Mather John C.
No associations
LandOfFree
Migration of Jupiter-family comets and resonant asteroids to near-Earth space does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Migration of Jupiter-family comets and resonant asteroids to near-Earth space, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Migration of Jupiter-family comets and resonant asteroids to near-Earth space will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-131049