Mercury.

Mean Distance from the Sun 0.39 AU (57.91 million km / 35.35 million miles)
Period of Revolution (length of year) 88 Earth days
Period of Rotation 58.65 Earth days
Length of day 175.94 Earth days
Inclination 7 degrees
Equatorial Diameter 4,875 km (3,029 miles)

Original image located at: http://photojournal.jpl.nasa.gov/index.html