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point in the orbit of a body, such as a planet or a spacecraft, which nearest to the centre of mass of the primary body, taevakeha orbiidi esmasele taevakehale lähim punkt
periapsiid . Kosmoseteaduse ja -tehnoloogia terminibaas. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//kth/periapsiid/1/est (01.07.2026)
