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An arcsecond (arsec) or second of arc is 1/60 of an arcminute, 1/3600 of a degree, 1/1296000 of a turn, and π/648000 (about 1/206265) of a radian.
In relation to the base unit of [angle] => (radians), 1 Arcseconds (arcsec) is equal to 4.848137E-6 radians, while 1 Circles (o) = 6.28319 radians.| 1 Arcseconds | to common angle units |
|---|---|
| 1 arcsec | = 4.848137E-6 radians (rad) |
| 1 arcsec | = 0.004848137 milliradians (mrad/mil) |
| 1 arcsec | = 0.0049382703096925 angular mils (µ mil) |
| 1 arcsec | = 0.00027777777776858 degrees (°deg) |
| 1 arcsec | = 0.00030864199259955 gradians (grad) |
| 1 arcsec | = 0.016666679271747 arcminutes (arcmin) |
| 1 arcsec | = 1 arcseconds (arcsec) |
| 1 arcsec | = 4.6296278258744E-6 sextants (60°) |
| 1 arcsec | = 9.2592379679144E-6 signs (30°) |
| 1 arcsec | = 7.7160439203653E-7 turns (t) |