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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 Hour Angles (HA) is equal to 0.26179938779 radians, while 1 Second Of Arc (SOA) = 4.848137E-6 radians.| 209400 Hour Angles | to common angle units |
|---|---|
| 209400 HA | = 54820.791803226 radians (rad) |
| 209400 HA | = 54820791.803226 milliradians (mrad/mil) |
| 209400 HA | = 55839983.176157 angular mils (µ mil) |
| 209400 HA | = 3140999.8773991 degrees (°deg) |
| 209400 HA | = 3490000.059411 gradians (grad) |
| 209400 HA | = 188460135.18339 arcminutes (arcmin) |
| 209400 HA | = 11307599559.011 arcseconds (arcsec) |
| 209400 HA | = 52349.977562243 sextants (60°) |
| 209400 HA | = 104699.75516277 signs (30°) |
| 209400 HA | = 8724.9934831234 turns (t) |