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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 Diameter Parts (Ø part) = 0.01666666666 radians.| 1 Second Of Arc | to common angle units |
|---|---|
| 1 SOA | = 4.848137E-6 radians (rad) |
| 1 SOA | = 0.004848137 milliradians (mrad/mil) |
| 1 SOA | = 0.0049382703096925 angular mils (µ mil) |
| 1 SOA | = 0.00027777777776858 degrees (°deg) |
| 1 SOA | = 0.00030864199259955 gradians (grad) |
| 1 SOA | = 0.016666679271747 arcminutes (arcmin) |
| 1 SOA | = 1 arcseconds (arcsec) |
| 1 SOA | = 4.6296278258744E-6 sextants (60°) |
| 1 SOA | = 9.2592379679144E-6 signs (30°) |
| 1 SOA | = 7.7160439203653E-7 turns (t) |
| Second Of Arc | to Diameter Parts (table conversion) |
|---|---|
| 1 SOA | = 0.00029088822011636 Ø part |
| 2 SOA | = 0.00058177644023271 Ø part |
| 3 SOA | = 0.00087266466034907 Ø part |
| 4 SOA | = 0.0011635528804654 Ø part |
| 5 SOA | = 0.0014544411005818 Ø part |
| 6 SOA | = 0.0017453293206981 Ø part |
| 7 SOA | = 0.0020362175408145 Ø part |
| 8 SOA | = 0.0023271057609308 Ø part |
| 9 SOA | = 0.0026179939810472 Ø part |
| 10 SOA | = 0.0029088822011636 Ø part |
| 20 SOA | = 0.0058177644023271 Ø part |
| 30 SOA | = 0.0087266466034907 Ø part |
| 40 SOA | = 0.011635528804654 Ø part |
| 50 SOA | = 0.014544411005818 Ø part |
| 60 SOA | = 0.017453293206981 Ø part |
| 70 SOA | = 0.020362175408145 Ø part |
| 80 SOA | = 0.023271057609308 Ø part |
| 90 SOA | = 0.026179939810472 Ø part |
| 100 SOA | = 0.029088822011636 Ø part |
| 200 SOA | = 0.058177644023271 Ø part |
| 300 SOA | = 0.087266466034907 Ø part |
| 400 SOA | = 0.11635528804654 Ø part |
| 500 SOA | = 0.14544411005818 Ø part |
| 600 SOA | = 0.17453293206981 Ø part |
| 700 SOA | = 0.20362175408145 Ø part |
| 800 SOA | = 0.23271057609308 Ø part |
| 900 SOA | = 0.26179939810472 Ø part |
| 1000 SOA | = 0.29088822011636 Ø part |
| 2000 SOA | = 0.58177644023271 Ø part |
| 4000 SOA | = 1.1635528804654 Ø part |
| 5000 SOA | = 1.4544411005818 Ø part |
| 7500 SOA | = 2.1816616508727 Ø part |
| 10000 SOA | = 2.9088822011636 Ø part |
| 25000 SOA | = 7.2722055029089 Ø part |
| 50000 SOA | = 14.544411005818 Ø part |
| 100000 SOA | = 29.088822011636 Ø part |
| 1000000 SOA | = 290.88822011636 Ø part |
| 1000000000 SOA | = 290888.22011636 Ø part |