Short-term rotational variability of eight KBOs from Sierra Nevada Observatory

Details Short-term rotational variability of eight KBOs from Sierra Nevada Observatory Short-term rotational variability of eight KBOs from Sierra Nevada Observatory

Mar 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...447.1131o&link_type=abstract

Astronomy and Astrophysics, Volume 447, Issue 3, March I 2006, pp.1131-1144

Astronomy and Astrophysics

Astrophysics

19

Minor Planets, Asteroids, Kuiper Belt, Comets: General

Scientific paper

In 2001, we started a CCD photometry programme to study the short-term variability of some of the brightest TNOs and Centaurs from the Sierra Nevada observatory. In this paper, we report our latest results on short-term rotational variability of 7 trans-neptunian objects: Orcus (2004 DW), 2002 AW{197}, 2003 AZ{84}, 2003 VS{2}, 2002 VE{95}, 2001 YH{140}, 1996 TL{66}, and a Centaur: 2003 CO{1}. Analysis of the photometric data revealed confident periodicities for 6 objects, with all the lightcurve amplitudes smaller than 0.2 mag, except for 2003 VS{2}. Considering all the objects for which reliable lightcurve amplitudes have been reported in the literature (32), the new statistics reveal that 31% of the bodies show variability above 0.15 mag, but only 16% of them display larger amplitudes than 0.4 mag. Here we present a summary of the main results obtained for these objects, and discuss the implications for their basic physical properties.

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