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sidereal hour

British  

noun

  1. a 24th part of a sidereal day

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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For example, if the right ascension of a star is exactly 15�, it will pass the meridian one sidereal hour after the vernal equinox.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" by Various

The sun apparently moves at the rate of 15� in a solar hour; the stars at the rate of 15� in a sidereal hour.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 7 "Arundel, Thomas" to "Athens" by Various

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