Posted by Sara on Monday, November 14, 2011 at 4:53pm.
The eccentricity of Mar's orbit is .0934.
The semi-major axis is 141,643,675 miles.
Therefore, the perihelion distance is
r(p) = 141,643,675(1-.0934) = 128,414,418.
and
r(a) = 141,643,675(1+.0934) = 154,871,931.
The mean radius of the earth's orbit is
r = 92,960,242 miles.