2765 20160701171710.0 ASTROimport-922 Fahed, R. 2012 2009: A Colliding-Wind Odyssey We present the results from two optical spectroscopic campaigns on colliding-wind binaries (CWB) which both occurred in 2009. The first one was on WR 140 (WC7pd + O5.5fc), the archetype of CWB, which experienced periastron passage of its highly elliptical 8-year orbit in January. The WR 140 campaign consisted of a unique and constructive collaboration between amateur and professional astronomers and took place at half a dozen locations, including Teide Observatory, Observatoire de Haute Provence, Dominion Astrophysical Observatory, Observatoire du Mont-Mégantic and at several small private observatories. The second campaign was on a selection of 5 short-period WR + O binaries not yet studied for colliding-wind effects: WR 12 (WN8h), WR 21 (WN5o + O7 V), WR 30 (WC6 + O7.5 V), WR 31 (WN4o + O8), and WR 47 (WN6o + O5). The campaign took place at Leoncito Observatory, Argentina, during 1 month. We provide updated values of most of these systems for the orbital parameters, new estimates for the WR and O star masses and new constraints on the mass-loss rates and colliding wind geometry. Moffat, A. F. J. Zorec, J. Eversberg, T. Chené, A. N. Alves, F. Arnold, W. Bergmann, T. Corcoran, M. F. Correia Viegas, N. G. Dougherty, S. M. Fernando, A. Frémat, Y. Gouveia Carreira, L. F. Hunger, T. Knapen, J. H. Leadbeater, R. Marques Dias, F. Martayan, C. Morel, T. Pittard, J. M. Pollock, A. M. T. Rauw, G. Reinecke, N. Ribeiro, J. Romeo, N. Sánchez-Gallego, J. R. dos Santos, E. M. Schanne, L. Stahl, O. Stober, B. Stober, B. Vollmann, K. Williams, P. M. Proceedings of a Scientific Meeting in Honor of Anthony F. J. Moffat 465 2012 372 http://esoads.eso.org/abs/2012ASPC..465..372F published in NONREF