Pluto System: February 15, 2006
Although its orbit is highly eccentric, Pluto's average distance from the Sun is 39.44 Astronomical Units (A.U.) or roughly 3.6 billion miles (5.9 billion kilometers).
Pluto has a diameter of roughly 1,416 miles (2,280 km) at the equator.
These HST data are from proposal 10774: H.A. Weaver (JHU/APL), S.A. Stern and J.R. Spencer (SwRI), M.W. Buie (Lowell Obs.), E. Young, L.A. Young, and A.J. Steffl (SwRI), M. Mutchler (STScI) and W.J. Merline (SwRI).
NASA, ESA, H. Weaver (JHU/APL), A. Stern (SwRI), and the HST Pluto Companion Search Team
This image is black and white and represents the range of brightness recorded by the ACS/HRC camera.