arcsec to rad
14 unitsConvert Second to Radian (arcsec to rad)
1 second = 0.000004848137199 radians. Convert seconds to radians instantly, with the exact factor, the formula and a reference table of common values.
arcsec to rad conversion table
| arcsec | rad |
|---|---|
| 1 arcsec | 0.000004848137199 rad |
| 2 arcsec | 0.000009696274398 rad |
| 3 arcsec | 0.0000145444116 rad |
| 5 arcsec | 0.00002424068599 rad |
| 10 arcsec | 0.00004848137199 rad |
| 20 arcsec | 0.00009696274398 rad |
| 50 arcsec | 0.0002424068599 rad |
| 100 arcsec | 0.0004848137199 rad |
| 250 arcsec | 0.0012120343 rad |
| 500 arcsec | 0.002424068599 rad |
| 1000 arcsec | 0.004848137199 rad |
What is a second?
A second of arc is one sixtieth of a minute, which makes it one 3,600th of a degree. It is written with a double prime, as in 15", and is usually called an arcsecond.
This is the scale astronomers work at. Star positions, the apparent size of planets, and the tiny wobble used to measure distance to nearby stars are all quoted in arcseconds. Latitude and longitude are given in degrees, minutes, and seconds for the same reason: it pins a place down to a few tens of meters.
In writing, the second is usually shortened to "arcsec". One second is 0.0002777778 degrees, and that ratio is what every number on this page is built from.
Related conversions
All angle units →Convert Second to all angle units
| Conversion | 1 arcsec equals |
|---|---|
| Second to circle | 7.716050e-7 circle |
| Second to degree | 0.0002777778 ° |
| Second to gon | 0.000308642 gon |
| Second to grad | 0.000308642 grad |
| Second to mil | 0.004938272 mil |
| Second to minute | 0.01666666797 arcmin |
| Second to quadrant | 0.00000308642 quadrant |
| Second to radian | 0.000004848137199 rad |
| Second to revolution | 7.716050e-7 r |
| Second to right angle | 0.00000308642 right angle |
| Second to sextant | 0.00000462963 sextant |
| Second to sign | 0.00000925926 sign |
| Second to turn | 7.716050e-7 turn |