Pluto: June 28, 2011 (WFC/UVIS)
Although its orbit is highly eccentric, Pluto's average distance from the Sun is 39.44 astronomical units (roughly 3.6 billion miles or 5.9 billion kilometers).
Pluto has a diameter of roughly 1,416 miles (2,280 kilometers) at the equator.
This image was created from HST data from proposal 12436: M. Showalter (SETI Institute) and D. Hamilton (University of Maryland).
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. The colors in this image are not what human eyes would see looking at Pluto.