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Nature of the small main belt Asteroid 3169 Ostro

Authors
  • P, Descamps
  • Franck Marchis
  • T, Michalowski
  • F, Colas
  • J, Berthier
  • F, Vachier
  • J-P, Teng-Chuen-Yu
  • A, Peyrot
  • B, Payet
  • J, Dorseuil
  • Y, Léonie
  • T, Dijoux
  • H, Berrouachdi
  • Chion, Hock
  • F, Benard
Type
Published Article
Journal
Icarus
Publisher
Elsevier
Publication Date
Aug 30, 2007
Volume
189
Issue
2
Pages
362–369
Source
SETI Institute
License
Unknown

Abstract

We present a set of rotational lightcurve measurements of the small main belt Asteroid 3169 Ostro. Our observations reveal an unambiguous, double-peaked rotational lightcurve with a peak-to-peak variation up to 1.2±0.05 mag and a synodic period of 6.509±0.001 h. From the large flux variation and the overall shape of the lightcurves, we suggest that 3169 Ostro could be a tightly bound binary or a contact binary, similar to the Trojan Asteroid 624 Hektor. A shape model of this system is proposed on the assumption that 3169 Ostro is a Roche ...

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