Mars revolves around the Sun once every 687 Earth days, or 1.88 Earth years. It revolves around the Sun at an average distance of 142 million miles, about 50 million miles farther out than the orbit of Earth.
The total circumference of Mars' orbit is about 888 million miles, compared with approximately 584 million miles for the orbital circumference of Earth. Mars' revolutionary orbit is also about 5.6 times more elliptical than Earth's, accounting for the large difference in orbital circumference. Mars follows its revolutionary path at an average speed of 53,858 miles per hour and comes within 128,409,598 miles of the Sun at its closest approach.