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An arcsecond (second of arc), represented by the symbol [math]''[/math],[1] is a unit of angle used in mathematics and astronomy. An arcsecond is 1/60th of an arcminute (minute of arc),[2] which in turn is 1/60th of a degree.[3] Therefore, an arcsecond is equal to 1/3600th of a degree,[2] meaning that there are 360 × 60 × 60 = 1,296,000 arcseconds in a full circle.

Related pages


  1. "List of Geometry and Trigonometry Symbols" (in en-US). 2020-04-17. 
  2. 2.0 2.1 Weisstein, Eric W.. "Arc Second" (in en). 
  3. Weisstein, Eric W.. "Arc Minute" (in en).