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What is the semi-major axis of an elliptical orbit with apogee and perigee radius of 100,000 km and eccentricity 0.89?

What is the semi-major axis of an elliptical orbit with apogee and perigee radius of 100,000 km and eccentricity 0.89? Correct Answer 52,910 km

Given, Apogee radius (ra) = 100,000 km Eccentricity (e) = 0.89 Semi-major axis (a) = ra / (1 + e) = 100,000 / (1 + 0.89) = 52,910 km

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