Compass and Scale Image of Pluto
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.