Short-Term Photometric Variations in a Sample of Transneptunian Objects and Centaurs. Rotational Properties

Details Short-Term Photometric Variations in a Sample of Transneptunian Objects and Centaurs. Rotational Properties Short-Term Photometric Variations in a Sample of Transneptunian Objects and Centaurs. Rotational Properties

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008epsc.conf..822o&link_type=abstract

European Planetary Science Congress 2008, Proceedings of the conference held 21-25 September, 2008 in Münster, Germany. Online a

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We present new time-resolved observations of 20 large Trans-Neptunian Objects (TNOs) and Centaurs taken at the Sierra Nevada Observatory 1.5m telescope (Granada, Spain), at the Calar Alto Observatory 2.2m telescope (Almeria, Spain) and at the 2.5m INT telescope at La Palma (Canary Islands, Spain). This program is the continuation of a lightcurve survey of the transneptunian belt that we carry out since 2000, approximately. All the CCD images were reduced and analyzed with identical tools and methods, and older images of some of the targets were reanalyzed with exactly the same software. Rotation periods and axial ratios (or degree of heterogeneity) were derived for most of the targets while for others only some constraints were obtained. These results were merged with the rotational parameters of other TNOs and Centaurs already published in the literature in order to build a data base of nearly 70 bodies. This allows us to search for possible correlations of the rotational parameters with different orbital parameters in the different dynamical groups. Also, we can search for correlations of rotational properties with purely physical parameters to get hints on the collisional evolution and other physical processes that could have had an effect on the different groups. Some preliminary work in this regard was already presented by Santos-Sanz et al. (2006) but we show numerous improvements here.

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