\documentstyle{article}
\title{The predictions of occultations and close approach of stars.}
\author{J\'er\^ome Berthier \\
Bureau des Longitudes, URA 707 CNRS \\
 77, av. Denfert Rocherea 75014 Paris \\
e-mail: berthier@imcce.fr}
\date{}

\begin{document}
\maketitle
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The observations of occultations of stars by asteroids (and more generally by
solar system objects) allow many applications such as high precision astrometry 
(order of 0.01 arcsec). It's also the sole way to get planetological information 
from Earth such as structure, shape, dimensions and neighbourhood of the asteroid.
This kind of events occurs many times per day, but there are only ten or so 
successful observations each year. Therefore it is increasingly  necessary to develop and 
inprove the predictions of occultations of stars by solar system objects, and 
their applications.

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