Asteroid (596) Scheila
The image was created from Hubble data from proposal HST proposal 12435: D. Jewitt (University of California, Los Angeles), H. Weaver (JHU/APL), M. Mutchler (STScI), S. Larson (University of Arizona), and J. Agarwal (ESA/ESTEC, University of Potsdam).
This image was originally black and white and recorded only overall brightness. These brightness values were translated into a range of bluish hues. Such color "maps" can be useful in helping to distinguish subtly varying brightness in an image.