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MCQAdvancedOrbits, Gravitation & Dynamics
BAAO — 2022 Astronomy & Astrophysics Challenge
Question 8
The cubesat CAPSTONE will enter a near-rectilinear halo orbit (NRHO) of the Moon on 13th November 2022 as a direct test of the orbit planned for the Lunar Gateway — a space station due to be built in orbit around the Moon by the end of the decade. It is a polar orbit, going from 1500 km above the North pole to 70 000 km above the South pole. Treating it as an ellipse, what is the eccentricity of the orbit? The Moon has a radius of 1740 km.
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Source
Source: British Astronomy and Astrophysics Olympiad (BAAO), Astronomy & Astrophysics Challenge 2022. Question text, answer-choice text, and answer were transcribed from the official BAAO paper and solutions PDFs; the explanation and metadata are original.