Planet Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto Distance from center of ellipse to focus in Astronomical Units (c) 0.080 0.005 0.017 0.142 0.250 0.534 0.901 0.271 9.821 Semi-Major Axis in Astronomical Units (a) 0.387 0.723 1.000 1.524 5.203 9.540 19.180 30.060 39,440 Eccentricity (e)​