Thanks, Greg, for making an image of this group; hardly any images of it have been made before, though one or two of the member galaxies have had some study in the literature.
As a group dominated by an S0/elliptical galaxy, this one is quite rich and massive.
IC 1459 definitely looks like an S0 galaxy in your image.
It lacks the compactness of the type examples of elliptical galaxies that are found in the Carnegie Atlas of Galaxies.
Beyond the inner spheroidal component, which falls off rapidly in surface brightness, there is an outer more extended component which falls off more gently.
Thus, the image classification of the two dimensional image is definitely S0 rather than elliptical, as S0 galaxy images have at least two different components ("core + halo").
What this galaxy actually looks like in three dimensions is another matter altogether; some of these two component systems genuinely look like a galaxy having a spheroid plus a planar disk, when they are seen edge-on........ but others of them do not.
The falloff of surface brightness with increasing galactocentric radius has been graphed in the literature, and this "two component" model is consistent with the surface brightness distribution that is actually observed over the face of IC 1459.
There is an extant Extremely Deep image by David Malin, made from co-added Schmidt plates, that shows some very strange outermost structures in IC 1459 :
In my experience, a few amateur images now do reach as deep as the co-added Malin plates.....but it isn't going to be an easy job to go this deep.
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Good images of many southern elliptical galaxies (and some S0 galaxies having a minimal disk) including IC 1459 can be found at:
http://www.astro.yale.edu/obey//galaxies.html
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