Arcsecond
arcsec
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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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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
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Astronomy Scientific Optical