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Asteroid close approaches: analysis and potential impact detection


Andrea Milani 1, Steven Chiesley 2, Paul Chudas 2,


Giovanni B. Valsecchi 3


1 Dipartamento di Mathematica, Universita di Pisa, Pisa, Italy

2 Jet Propulsion Laboratory, California Institute of Technology, USA
3 IAS-CNR, Roma, Italy


Introduction

The last ten years have seen tremendous progress in our ability to
assess the risk that an asteroid or comet might collide with the Earth. The
catalyst for much of the increased interest in these Near-Earth Objects
(NEOs) was a request by the U.S. Congress in 1990 that NASA undertake two
workshop studies, one to study ways of increasing the discovery rate of
these objects, and another to study the technologies and options for
deflecting or destroying an NEO if it should be found to pose a danger to
life on Earth. The report from the first of these workshops proposed
an international NEO survey program called Spaceguard, borrowing the name
from a similar project in Arthur C. Clark's science fiction novel
Rendezvous with Rama [1].................................

List of references

1. Morrison D. (ed.). The Spaceguard Survey Report of the NASA
International Near-Earth-Object Detection Workshop. Pasadena, Jet
Propulsion Laboratory. 1992.
2. Bowell E., Muinonen K. Earth-crossing asteroids and comets: groundbased
search strategies. In: Hazards due to comets and asteroids, p. 149-197
(Gehrels T., ed.), Univ. Arizona Press, Tucson. 1994.
3. Milani A, Chesley S.R., Valsecchi G.B. Asteroid close encounters with
the Earth: risk assessment . Planetary Space Sciences. V. 48, p. 945-
954.