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M. Birlan (IMCCE - Observatoire de Paris, 77 Avenue Denfert Rochereau, F-75014 Paris, France), P. Vernazza, M. Fulchignoni (LESIA - Observatoire de Paris-Meudon, 5 Place Jules Janssen, 92195 Meudon Cedex, France)
The asteroid 832 Karin belongs to the large family of Koronis of the main belt. Cluster analysis and numerical integrations tests performed by Nesvorny et al (Nature 417, 2002) define a small family of asteroids grouped around 832 Karin. Numerical integration of their orbits converge towards the same orbital elements 5.6 million years ago. It can be the most recent family of asteroids produced by the collision of two bodies belonging to the main belt.
The spectral region 0.8-2.5 micron is very important for characterising the mineralogy of the surface of asteroids. The recent spectral data allow the refining of our knowledge concerning these bodies (with particular interest of the mineralogy of asteroids inside the Karin family in our case) and their relations with comets and meteorites, and offer important clues for the knowledge of the history of solar system.
Observations of some family members of Karin family have been carried out on November 2003 with SpeX/IRTF by using the remote observing center from Meudon Observatory – France (CODAM). Our goal was to investigate the spectral region 0.8-2.5 micron in order to obtain information concerning the mineralogy of the surface of the members of this family. Near-IR spectra of 832 Karin, 13807 1998 XE13, and 13765 Nansmith will be presented as well as the preliminary mineralogical analysis of their surface.
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Bulletin of the American Astronomical Society, 36 #4
© 2004. The American Astronomical Soceity.