Light curves of ten Centaurs from K2 measurements

Marton, Gábor; Kiss, Csaba; Molnár, László; Pál, András; Farkas-Takács, Anikó; M.Szabó, Gyula; Müller, Thomas; Ali-Lagoa, Victor; Szabó, Róbert; Vinkó, József; Sárneczky, Krisztián; E.Kalup, Csilla; Marciniak, Anna; Duffard, Rene; L.Kiss, László

doi:10.1016/j.icarus.2020.113721

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Light curves of ten Centaurs from K2 measurements

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Müller, Thomas
Center for Astrochemical Studies at MPE, MPI for Extraterrestrial Physics, Max Planck Society;

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Citation

Marton, G., Kiss, C., Molnár, L., Pál, A., Farkas-Takács, A., M.Szabó, G., et al. (2020). Light curves of ten Centaurs from K2 measurements. Icarus, 345: 113721. doi:10.1016/j.icarus.2020.113721.

Cite as: https://hdl.handle.net/21.11116/0000-0006-BFB1-B

Abstract

Here we present the results of visible range light curve observations of ten Centaurs using the Kepler Space Telescope in the framework of the K2 mission. Well defined periodic light curves are obtained in six cases allowing us to derive rotational periods, a notable increase in the number of Centaurs with known rotational properties.
The low amplitude light curves of (471931) 2013 PH₄₄ and (250112) 2002 KY₁₄ can be explained either by albedo variegations, binarity or elongated shape. (353222) 2009 YD₇ and (514312) 2016 AE₁₉₃ could be rotating elongated objects, while 2017 CX₃₃ and 2012 VU₈₅ are the most promising binary candidates due to their slow rotations and higher light curve amplitudes. (463368) 2012 VU₈₅ has the longest rotation period, P = 56.2 h observed among Centaurs. The P > 20 h rotation periods obtained for the two potential binaries underlines the importance of long, uninterrupted time series photometry of solar system targets that can suitably be performed only from spacecraft, like the Kepler in the K2 mission, and the currently running TESS mission.