Find the Eccentricity E of the Ellipse $606 \mathrm {~km}$ Determine an Equation for the Ellipse If the Distance

Find the eccentricity e of the ellipse.
-A satellite is to be put into an elliptical orbit around a moon. The moon is a sphere with radius $606 \mathrm {~km}$ . Determine an equation for the ellipse if the distance of the satellite from the surface of moon varies from $308 \mathrm {~km}$ to $988 \mathrm {~km}$ .

A) $\frac { x ^ { 2 } } { 1594 ^ { 2 } } + \frac { y ^ { 2 } } { 914 ^ { 2 } } = 1$

B) $\frac { x ^ { 2 } } { 988 } + \frac { y ^ { 2 } } { 308 } = 1$

C) $\frac { x ^ { 2 } } { 914 ^ { 2 } } + \frac { y ^ { 2 } } { 1594 ^ { 2 } } = 1$

D) $\frac { x ^ { 2 } } { 308 } + \frac { y ^ { 2 } } { 988 } = 1$