%0 Journal Article
%T The Hipparcos observations and the mass of sub-stellar objects
%A D. Pourbaix
%J Physics
%D 2001
%I arXiv
%R 10.1051/0004-6361:20010252
%X The Hipparcos Intermediate Astrometric Data have been used lately to estimate the inclination of the orbital plane of candidate extrasolar planets. Whereas most of these investigations derive almost face-on orbits, we show that the astrometric data are seldom precise enough to undertake such studies and that the `face-on' result might be just a spurious effect of the method.
%U http://arxiv.org/abs/astro-ph/0102316v1