NASA NTRS · 19780021079
Earth-Approaching Asteroids as Targets for Exploration
Abstract
A mission strategy focused on the earth approaching asteroids is presented. The opportunities for sample return and manned visits favor the closer Apollos and Amors over the main belt objects.
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Shoemaker, E. M., Helin, E. F.. 1978-01-01. Earth-Approaching Asteroids as Targets for Exploration. https://ntrs.nasa.gov/citations/19780021079
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