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A second of arc, or arcsecond (arsec) 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 Second Of Arc (SOA) is equal to 4.848137E-6 radians, while 1 Milliradians (mrad/mil) = 0.001 radians.| 100 Second Of Arc | to common angle units |
|---|---|
| 100 SOA | = 0.0004848137 radians (rad) |
| 100 SOA | = 0.4848137 milliradians (mrad/mil) |
| 100 SOA | = 0.49382703096925 angular mils (µ mil) |
| 100 SOA | = 0.027777777776858 degrees (°deg) |
| 100 SOA | = 0.030864199259955 gradians (grad) |
| 100 SOA | = 1.6666679271747 arcminutes (arcmin) |
| 100 SOA | = 100 arcseconds (arcsec) |
| 100 SOA | = 0.00046296278258744 sextants (60°) |
| 100 SOA | = 0.00092592379679144 signs (30°) |
| 100 SOA | = 7.7160439203653E-5 turns (t) |