 | An arcsecond (denoted by the symbol “) is an anglular measurement equal to 1/3600 of a degree or 1/60 of an arcminute. There are also 206,264.5” in a radian, so that 1” = 4.848 ×10-6 radians.
A milliarcsecond is 10-3 arcseconds. A microarcsecond (μas) is 10-6 arcseconds. |
  
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