Orbital characterization of the β Pictoris b giant planet G. Chauvin, A.-M. Lagrange, H. Beust, M. Bonnefoy, A. Boccaletti, D. Apai, F. Allard, D. Ehrenreich, J. H. V. Girard, D. Mouillet and D. Rouan A&A, 542 (2012) A41 Published online: 04 June 2012 DOI: 10.1051/0004-6361/201118346