Difficult cases in photometric studies of asteroids

Anna Marciniak, Frederick Pilcher, Dagmara Oszkiewicz, Przemysław Bartczak, Toni Santana-Ros, Krzysztof Kamiński, Seitaro Urakawa, Waldemar Ogłoza, Stephane Fauvaud, Paweł Kankiewicz, Viktor Kudak, Michał Żejmo, Kota Nishiyama, Shin-ichiro Okumura, Tokuhiro Nimura, Roman Hirsch, Izabella Konstanciak, Lukasz Tychoniec and Michał Figas

We present a photometric campaign targeted at asteroids that display both long periods of rotation and small amplitudes of brightness variations. Our aim is to debias available sample of spin and shape modelled asteroids and to correct previous wrong period determinations. Our newest findings are corrected period determinations for asteroids (279) Thule (P=23.896h ± 0.005 h), (673) Edda (P=22.340h ± 0.004 h), and (737) Arequipa (P=7.0259h ± 0.0003 h). Supporting lightcurves are presented in this paper.

Proceedings of the Polish Astronomical Society, vol. 3, 84-90 (2016)

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