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Title:
Short-term rotational variability of eight KBOs from Sierra Nevada Observatory
Authors:
Ortiz, J. L.; Gutiérrez, P. J.; Santos-Sanz, P.; Casanova, V.; Sota, A.
Affiliation:
AA(Instituto de Astrofísica de Andalucía, CSIC, Apt 3004, 18080 Granada, Spain ), AB(Instituto de Astrofísica de Andalucía, CSIC, Apt 3004, 18080 Granada, Spain), AC(Instituto de Astrofísica de Andalucía, CSIC, Apt 3004, 18080 Granada, Spain), AD(Instituto de Astrofísica de Andalucía, CSIC, Apt 3004, 18080 Granada, Spain), AE(Instituto de Astrofísica de Andalucía, CSIC, Apt 3004, 18080 Granada, Spain)
Publication:
Astronomy and Astrophysics, Volume 447, Issue 3, March I 2006, pp.1131-1144 (A&A Homepage)
Publication Date:
03/2006
Origin:
EDP Sciences
Astronomy Keywords:
minor planets, asteroids, Kuiper Belt, comets: general
DOI:
10.1051/0004-6361:20053572
Bibliographic Code:
2006A&A...447.1131O

Abstract

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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