I found this on a power point on the net and trying to solve it.

Its a conic section from the ellipse chapter.

- The mean distance of
Marsfrom the Sun is 142millionmiles.

Perihelion=128.5millionmiles- 1. What is Aphelion = ??
- 2. Equation for
Marsorbit?

- Round to nearest tenth if necessary.
- Hint: Orbit of a planet about the sun is an Ellipse, with the Sun at one focus. Aphelion of a planet is its greatest distance from the Sun and the perihelion is its shortest distance. Mean distance of a planet from the sun is the length of the semi major axis of the elliptical orbit.

1. Aphelion

2. Equation