A satellite, placed into the Earth's orbit to investigate the ionosphere, had the following orbit parameters: perigee, 475 km; apogee, 2265 km (both distances above the Earth's surface); period, 112.7 min. Find the ratio vp/va of the speed at perigee to that at apogee.(adsbygoogle = window.adsbygoogle || []).push({});

I was told by someone that this ratio is equal to the inverse ratio of the distances. But the period is thrown in so I have no idea where to start on this one. I know this follows an elliptical shape but I still can't think of where to begin.

Can anyone give a first couple of steps to get me started?

Thanks

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# Homework Help: Perigee Apogee Ratio

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