CYLINDRICAL PROJECTION MAP OF ASTEROID 4179 TOUTATIS

Toutat2.jpg is a shaded relief map of asteroid 4179 Toutatis.  It is the same map as Toutatis.jpg, reprojected to Simple Cylindrical Projection.  As with all
maps, it is the cartographer's interpretation and not all features are 
necessarily certain given the limited data available - this interpretation
stretches the data as far as is feasible.  This map has not yet been
published.

Toutatis was imaged by delay-doppler radar at Goldstone and Arecibo in
December 1992.  Images are described in:

Ostro, S.J. et al., 1995. "Radar Images of Asteroid 4179 Toutatis".  SCIENCE,
    v. 270, pp. 80-83.

A polyhedral model of the shape of Toutatis was derived from the
radar images and is described in:

Hudson, R.S. and Ostro, S.J., 1995.  "Shape and Non-Principal Axis Rotation
of Asteroid 4179 Toutatis".  SCIENCE, v. 270, pp. 84-86.

I used the published rendered images of that shape model to derive a 
preliminary digital shape model (radii at regular increments of latitude 
and longitude).  The digital model was further constrained by the positions
of radar limbs and terminators and other features in the original images.
The viewing geometry for the published images is perpendicular to the
radar line of sight.  Some images must be mirror-reversed left to right to
correspond to the shape model, and the frequency axes on some of the higher
resolution images must be modified to fit the model because of slight errors
in the assumed rotation state.  The 1996 observations should help improve
the model and map.  A paper on the process is in preparation.

This version of the file, with labels intact, is in the public domain.

Philip Stooke,
Department of Geography,
University of Western Ontario,
London, Ontario, Canada N6A 5C2
stooke@sscl.uwo.ca