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zenith distance

noun
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variants: or zenith angle

Definition of zenith distance

: the angular distance of a celestial object from the zenith measured by the arc of a vertical circle intercepted between the object and the zenith : the complement of the altitude

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“Zenith distance.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/zenith%20distance. Accessed 8 Mar. 2021.

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