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236 years ago. . .

Published online by Cambridge University Press:  01 August 2006

Giovanni B. Valsecchi
Giovanni B. Valsecchi*
Affiliation:
IASF-Roma, INAF, via Fosso del Cavaliere 100, I-00133 Roma (Italy) email: giovanni@iasf-roma.inaf.it
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Abstract

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Some of the problems related to Near Earth Objects (NEOs), like orbit determination and ephemeris computation, are not new, and had to be dealt with since the beginning of NEO astronomy. The latter practically started with the discovery of Comet D/1770 L1 Lexell, that passed very close to the Earth in 1770; studies of the chaotic dynamics of this exceptional object continued well into the XIXth century. At the end of the XXth century there has been a renewal of interest in NEOs, as attested by IAU Symposium 236.

Keywords

orbit determinationmultiple solutionsclose approaches

References

Carusi, A.Kresáková, M. and Valsecchi, G. B. 1982, Astron. Astrophys. 116, 201Google Scholar
LeVerrier, U. J. 1844, Comptes rendues de l'Academie des sciences 19, 982Google Scholar
LeVerrier, U. J. 1848, Comptes rendues de l'Academie des sciences 26, 465Google Scholar
LeVerrier, U. J. 1857, Annales de l'observatoire de Paris 3, 203Google Scholar
Lexell, A. J. 1777a, Acta Academiae Scientiarum Imperialis Petropolitanae I, 332Google Scholar
Lexell, A. J. 1777b, Acta Academiae Scientiarum Imperialis Petropolitanae II, 328Google Scholar
Lexell, A. J. 1778a, Acta Academiae Scientiarum Imperialis Petropolitanae I, 317Google Scholar
Lexell, A. J. 1778b, Acta Academiae Scientiarum Imperialis Petropolitanae II, 12Google Scholar
Milani, A., Sansaturio, M. E., Tommei, G., Arratia, O. and Chesley, S. R. 2005a, Astron. Astrophys. 431, 729Google Scholar
Milani, A., Chesley, S. R., Sansaturio, M. E., Tommei, G. and Valsecchi, G. B. 2005b, Icarus 173, 362CrossRefGoogle Scholar