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A.D. Storrs (Towson Univ.), C. Dunne (Towson H.S.), J.-M. Conan, L. Mugnier (ONERA)
Asteroid 216 Kleopatra was imaged by the Hubble Space Telescope on 2 July 1993. The Wide Field/Planetary Camera 1 (WF/PC 1) was used with the F439W (B) and F555W (V) filters. Image restoration with the Maximum Entropy algorithm was reported by Storrs et al. 1999 (Icarus vol. 137 pp. 260-268), who found it to be elongated by at least 4:1 (projected on the sky at the time of observation) but further details were obscured by artifacts of the reconstruction.
We present reconstruction of the same data using the MISTRAL algorithm (Conan et al. 2000, The Messenger v. 99 p. 38). This process does not overenhance the edges of planetary type images as most astronomical reconstruction procedures do. However, some extensive preparatory work is necessary to ensure the uniqueness of the reconstruction. We present comparisons between B and V images, which are diagnostic of the slope of the blue continuum and may show some mineralogic changes.
The Hubble Space Telescope is operated by the Space Telescope Science Institute under NASA grant NAS5-26555.