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An arcsecond (second of arc), represented by the symbol [math]''[/math], is a unit of angle used in mathematics and astronomy. An arcsecond is 1/60th of an arcminute (minute of arc), which in turn is 1/60th of a degree. Therefore, an arcsecond is equal to 1/3600th of a degree, meaning that there are 360 × 60 × 60 = 1,296,000 arcseconds in a full circle.
- "List of Geometry and Trigonometry Symbols" (in en-US). 2020-04-17. https://mathvault.ca/hub/higher-math/math-symbols/geometry-trigonometry-symbols/.
- Weisstein, Eric W.. "Arc Second" (in en). https://mathworld.wolfram.com/ArcSecond.html.
- Weisstein, Eric W.. "Arc Minute" (in en). https://mathworld.wolfram.com/ArcMinute.html.