Comet-like Asteroid P/2010 A2
The image was created from Hubble data from proposal 12053: D. Jewitt (UCLA), H. Weaver (JPL/APL), M. Drahus (UCLA), and M. Mutchler (STScI).
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.