circle of perpetual occultation

circle of perpetual occultation

That circle of the celestial sphere, centered on the polar axis and having an angular distance from the depressed pole approximately equal to the latitude of the observer, within which celestial bodies are not seen to rise at the observer's latitude. Contrasted to a circle of perpetual apparition.

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Industry/Domain: Earth science
Category: Mapping science
Company: American Congress on Surveying & Mapping
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