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CCD photometry, spin and shape model of the asteroid 1572 Posnania

2001; EDP Sciences; Volume: 371; Issue: 2 Linguagem: Inglês

10.1051/0004-6361

1432-0746

Tadeusz Michałowski, W. Pych, T. Kwiatkowski, A. Kryszczyńska, Petr Pravec, W. Borczyk, A. Erikson, W. Z. Wisniewski, F. Colas, J. Berthier,

Planetary Science and Exploration

Lightcurves of the asteroid 1572 Posnania were obtained at six observatories on 19 nights during four apparitions: in 1993, 1994-95, 1996, and 1999. The synodical period is found to be 8.048 hours and the observed amplitudes of brightness variations are in the range of 0.37-0.40 mag. The sense of rotation is retrograde with a sidereal period days. The ecliptic coordinates of the pole of this asteroid are and . The shape of Posnania can be approximated by a triaxial ellipsoid model with semiaxes ratios and .