Adaptive optics observations of asteroid (216) Kleopatra

Details Adaptive optics observations of asteroid (216) Kleopatra Adaptive optics observations of asteroid (216) Kleopatra

Oct 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002a%26a...394..339h&link_type=abstract

Astronomy and Astrophysics, v.394, p.339-343 (2002)

Physics

Optics

13

Instrumentation: Adaptive Optics, Minor Planets, Asteroids

Scientific paper

The large main-belt asteroid (216) Kleopatra has been for long suspected to be a binary object, mainly due to its large lightcurve amplitude. However, recent observations suggest that it is a single ``bone-shaped'' or bi-lobated body (Ostro et al. \cite{ostro00}; Tanga et al. \cite{tanga01}). We present results obtained from ground-based adaptive optics observations, and in agreement with the radar raw-observations, the images show two prominent lobes. Making use of the MISTRAL deconvolution technique, the restored images yield a well-separated binary object. Nevertheless, the spatial resolution of the 3.6 m ESO telescope is limited and a dumbbell-shaped body could yield similar features. Further simulations show that adaptive optics observations with an 8-meter class telescope analyzed with the powerful MISTRAL deconvolution technique could overcome this limitation. Based on observations collected at ESO-La Silla, Chile.

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