Comet Hazard to the Earth

Details Comet Hazard to the Earth Comet Hazard to the Earth

2001-08-10

arxiv.org/abs/astro-ph/0108187v1

Adv.Space Res.28:1107-1116,2001

Astronomy and Astrophysics

Astrophysics

12 pages, in press in "Advances in Space Research" (Proc. of COSPAR-2000, Warsaw)

Scientific paper

10.1016/S0273-1177(01)00494-X

Migration of trans-Neptunian objects to the Earth is considered. Due to the gravitational influence of large trans-Neptunian objects and mutual collisions, some objects can get such orbits, from which they can be moved inside the Solar System under the gravitational influence of planets. About 10-20% or even more 1-km Earth-crossers could have come from the Edgeworth-Kuiper belt and can move in Jupiter-crossing orbits. The number of former trans-Neptunian objects that cross the Earth's orbit moving in orbits with aphelia inside Jupiter's orbit can be of the same order of magnitude. A total mass of icy planetesimals delivered to the Earth during formation of the giant planets can be about the mass of the Earth's oceans.

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