At the time of the Hubble observation, the comet was 1.153 astronomical units (172 million km or 107 million miles) from the Sun. The comet was 0.218 astronomical units (32.6 million km or 20.2 million miles) from Earth.
This image was created from HST data from proposal 12312: H. Weaver (JHU/APL), M. A’Hearn (University of Maryland, College Park), N. Dello Russo (JHU/APL), P. Feldman (Johns Hopkins University), and S.A. Stern (Southwest Research Institute)
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.