How do you circle a moon?

It may initially seem premature to worry about the spacecraft’s path and orbit upon arrival at Mars. But the science and engineering goals for the mission are both precise and challenging, frequently requiring the spacecraft to be in a particular location or orientation with respect to Mars, the moons, the Earth or the Sun. As a result, we need to consider our route through Martian space early so that any structural or operational requirements will be reflected in the spacecraft design.