Possible Long-Lived Asteroid Belts in the Inner Solar System

Details Possible Long-Lived Asteroid Belts in the Inner Solar System Possible Long-Lived Asteroid Belts in the Inner Solar System

1999-05-06

arxiv.org/abs/astro-ph/9905067v1

Nature 399 (1999) 41

Astronomy and Astrophysics

Astrophysics

10 pages, 1 figure, appearing in 6th May issue of Nature

Scientific paper

10.1038/19919

The recent years have witnessed a carnival of discoveries in the Outer Solar System. Here we provide evidence from numerical simulations of orbital stability to suggest the possible existence of two long lived belts of primordial planetesimals in the Solar System. The first is the domain of the Vulcanoids (between 0.09 - 0.21 AU) between the Sun and Mercury, where remnant planetesimals may survive on dynamically stable orbits provided they possess a characteristic radius greater than 0.1 km. The second is a belt between the Earth and Mars (1.08 -1.28 AU) on which an initial population of particles on circular orbits may survive for the age of the Solar System. A search through the catalogues of Near-Earth Objects reveals an excess of asteroids with low eccentricities and inclinations occupying this belt, such as the recently discovered objects 1996 XB27, 1998 HG49 and 1998 KG3.

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