CCD photometry, spin and shape model of the asteroid 1572 Posnania T. Michałowski, W. Pych, T. Kwiatkowski, A. Kryszczyńska, P. Pravec, W. Borczyk, A. Erikson, W. Wisniewski, F. Colas and J. Berthier A&A, 371 2 (2001) 748-752 Published online: 15 May 2001 DOI: 10.1051/0004-6361:20010372