Halley’s Comet, with its eccentric orbit, is 56 million miles (90.123 million kilometers) from the sun at its nearest approach but over 3,200 million miles (5,149.900 million kilometers) when farthest away.

Pluto and Mercury are the most eccentric of the major planets, but some comets, such as the famous Halley’s Comet, have extremely eccentric orbits.