Uranus Color Composite: Full-Size Image
The semi-major axis of Uranus's orbit about the sun is 19.18 Astronomical Units (A.U.) or roughly 2.9 billion km.
The planet (without rings) has a diameter of roughly 32,000 miles (51,000 km) at the equator.
This image was created from HST data from proposal 9823: M. Showalter (Stanford University/NASA Ames) and J. Lissauer (NASA Ames).
F330W (U)), F475W (g), F606W (V), F814W (I), CLEAR
NASA, M. Showalter (Stanford University/NASA Ames Research Center), J. Lissauer (NASA Ames Research Center)