Visible and near-infrared colors of Transneptunian objects and Centaurs from the second ESO large program

Details Visible and near-infrared colors of Transneptunian objects and Centaurs from the second ESO large program Visible and near-infrared colors of Transneptunian objects and Centaurs from the second ESO large program

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...493..283d&link_type=abstract

Astronomy and Astrophysics, Volume 493, Issue 1, 2009, pp.283-290

Astronomy and Astrophysics

Astrophysics

19

Techniques: Photometric, Kuiper Belt, Infrared: Solar System

Scientific paper

Aims: We investigate color properties and define or check taxonomic classifications of objects observed in our survey. Methods: All observations were performed between October 2006 and September 2007 at the European Southern Observatory 8 m Very Large Telescope, UT1 and UT2 at the Paranal Observatory in Chile. For visible photometry, we used the FORS1 instrument, and for near-infrared, ISAAC. Taxonomic classifications from the Barucci system were assigned using G-mode analysis. Results: We present photometric observations of 23 TNOs and Centaurs, nine of which have never been previously observed. Eighteen of these objects were assigned taxonomic classifications: six BB, four BR, two RR, and six that are given two or more categories due to insufficient data. Three objects that had been previously observed and classified, changed classes most likely due to surface variation: 26375 (1999 DE9), 28978 (Ixion), and 32532 (Thereus). Two objects, 47932 (2000 GN171) and 54598 (Bienor) had absolute magnitude values that were significantly different from previously published results, attributed to extreme lightcurve amplitudes.
Based on observations at the European Southern Observatory, Chile under programs 178.C-0867 and 178.C-0036.

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