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28 March 2024
 
  » arxiv » 1310.3220

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Occultation Evidence for a Satellite of the Trojan Asteroid (911) Agamemnon
Bradley Timerson ; John Brooks ; Steven Conard ; David W. Dunham ; David Herald ; Alin Tolea ; Franck Marchis ;
Date 11 Oct 2013
AbstractOn 2012 January 19, observers in the northeastern United States of America observed an occultation of 8.0-mag HIP 41337 star by the Jupiter-Trojan (911) Agamemnon, including one video recorded with a 36cm telescope that shows a deep brief secondary occultation that is likely due to a satellite, of about 5 km (most likely 3 to 10 km) across, at 278 km $pm$ 5 km (0.0931 arcsec) from the asteroid’s center as projected in the plane of the sky. A satellite this small and this close to the asteroid could not be resolved in the available VLT adaptive optics observations of Agamemnon recorded in 2003. The outline of Agamemnon is fit well by an ellipse with dimensions 190.6 $pm$ 0.9 km by 143.8 $pm$ 1.5 km. The angular diameter of HIP 41337 was found to be 0.5 $pm$ 0.1 milli-arcsec. After (624) Hektor, this could be the second Jupiter Trojan asteroid known to possess a small satellite.
Source arXiv, 1310.3220
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