Arcsecond

arcsec

Scientific Unit

The arcsecond is the smallest common unit of angular measurement, equal to 1/3600th of a degree, used for extremely precise angle measurements.

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1 arcsec = radian

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Arcsecond (″)

The arcsecond is the smallest common unit of angular measurement, equal to 1/3600th of a degree, used for extremely precise angle measurements.

Characteristics

  • 1 degree = 3600 arcseconds
  • 1 arcminute = 60 arcseconds
  • Symbol: ″ or ”
  • Also called second of arc
  • Used for ultra-precise measurements

Applications

  • Astronomical observations
  • Telescope and optical measurements
  • Precision surveying
  • Astrometry and star position measurements
  • High-precision engineering

Related Units

Used In Regions

Astronomy Scientific Optical
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