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Shapes and rotational properties of thirty asteroids from photometric data |
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| Authors: | Johanna Torppa Tadeusz Micha?owski Agnieszka Kryszczyńska Richard Kowalski |
| Institution: | a University of Helsinki, Observatory, PO Box 14, FIN-00014 Helsinki, Finland b Astronomical Observatory, Adam Mickiewicz University, ul. S?oneczna 36, 60-286 Poznań, Poland c Institute of Astronomy, Rozhen National Observatory, PO Box 136, 4700 Smolyan, Bulgaria d Quail Hollow Observatory, 7630 Conrad St. Zephyrhills, FL, USA |
| Abstract: | We have analyzed photometric lightcurves of 30 asteroids, and present here the obtained shapes, rotational periods and pole directions. We also present new photometric observations of five asteroids. The shape models indicate the existence of many features of varying degrees of irregularity. Even large main-belt asteroids display such features, so the resulting poles and periods are more consistent than those obtained by simple ellipsoid-like models. In some cases the new rotational parameters are rather different from those obtained previously, and in a few cases there were no proper previous estimates at all. |
| Keywords: | Asteroids rotation Photometry Surfaces asteroids |
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