Puzzling rotation of asteroid 288 Glauke

Free access article

Issue		A&A Volume 404, Number 2, June III 2003


Page(s)		729 - 733
Section		The Sun
DOI		http://dx.doi.org/10.1051/0004-6361:20030566

A&A 404, 729-733 (2003)
DOI: 10.1051/0004-6361:20030566

Puzzling rotation of asteroid 288 Glauke

A. Kryszczynska, T. Kwiatkowski and T. Michalowski

Astronomical Observatory, Adam Mickiewicz University, Sloneczna 36, 60-286 Poznan, Poland
(Received 9 January 2003 / Accepted 13 March 2003)

Abstract
Most asteroids rotate about their axis of maximum moment of inertia. However, for several small asteroids with very slow rotation rates, the damping time scale is expected to be longer than the age of the Solar System, implying that these objects may exhibit non-principal axis rotation. The asteroid 288 Glauke is suspected to undergo tumbling rotation because of very long period of light variations. We observed this object during 39 nights from January to May 2000 at the Borowiec Observatory (Poland). Our lightcurve with a peak-to-peak amplitude of 0.7 mag has a complicated nature which can result from a non-principal axis rotation or a very complex shape of this body.

Key words: techniques: photometric -- minor planets, asteroids

Offprint request: A. Kryszczynska, agn@amu.edu.pl

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