P/2010 A2 LINEAR - I. An impact in the asteroid main belt O. R. Hainaut, J. Kleyna, G. Sarid, B. Hermalyn, A. Zenn, K. J. Meech, P. H. Schultz, H. Hsieh, G. Trancho, J. Pittichová and B. Yang A&A, 537 (2012) A69 Published online: 10 January 2012 DOI: 10.1051/0004-6361/201118147