Arcsecond
Scientific System

Arcsecond (″)

An arcsecond (″) is 1/60 of an arcminute or 1/3600 of a degree. Arcseconds measure stellar positions, telescope resolution, and atmospheric seeing. The Hubble Space Telescope resolves about 0.05 arcseconds. GPS accuracy is measured in arcseconds.

Convert From Arcseconds

Convert To Arcseconds

Conversion Factors

1 ″ 0.0002777778 °
1 ″ 4.848136815e-6 rad
1 ″ 0.000308642 grad
1 ″ 7.7160493889e-7 turn
1 ″ 0.0166666667 ′
1 ″ 999.9992008 mas
1 ″ 0.0048481368 mrad
1 ″ 2.4691358044e-5 point
1 ″ 3.0864197556e-6 quadrant
1 ″ 4.6296296333e-6 sextant
1 ″ 9.2592592667e-6 sign

Related Units