Reconstructing HST Images of Asteroids

Details Reconstructing HST Images of Asteroids Reconstructing HST Images of Asteroids

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aas...203.1604s&link_type=abstract

American Astronomical Society Meeting 203, #16.04; Bulletin of the American Astronomical Society, Vol. 35, p.1233

Astronomy and Astrophysics

Astronomy

Scientific paper

We present reconstructions of images of 22 large main belt asteroids that were observed by Hubble Space Telescope with the Wide-Field/Planetary cameras. All images were restored with the MISTRAL program (Mugnier, Fusco, and Conan 2003) at enhanced spatial resolution. This is possible thanks to the well-studied and stable point spread function (PSF) on HST. We present some modeling of this process and determine that the Strehl ratio for WF/PC (aberrated) images can be improved to 130 ratio of 80
We will report sizes, shapes, and albedos for these objects, as well as any surface features. Images taken with the WFPC-2 instrument were made in a variety of filters so that it should be possible to investigate changes in mineralogy across the surface of the larger asteroids in a manner similar to that done on 4 Vesta by Binzel et al. (1997). Of particular interest are a possible water of hydration feature on 1 Ceres, and the non-observation of a constriction or gap between the components of 216 Kleopatra.
Reduction of this data was aided by grant HST-GO-08583.08A from the Space Telescope Science Institute.
References:
Mugnier, L.M., T. Fusco, and J.-M. Conan, 2003. JOSA A (submitted)
Binzel, R.P., Gaffey, M.J., Thomas, P.C., Zellner, B.H., Storrs, A.D., and Wells, E.N. 1997. Icarus 128 pp. 95-103

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