How many arcsecond in 1 radian?
The answer is 206264.8062471.
We assume you are converting between arcsecond and radian.
You can view more details on each measurement unit: arcsecond or
radian
The SI derived unit for angle is the radian.
1 arcsecond is equal to 4.8481368110954E-6 radian.
Note that rounding errors may occur, so always check the results.
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A second of arc or arcsecond is a unit of angular measurement which comprises one-sixtieth of an arcminute, or 1/3600 of a degree of arc or 1/1296000 (approximately 7.7×10-7) of a circle. It is the angular diameter of an object of 1 unit diameter at a distance of 360×60×60/(2pi) (approximately 206,265 units), such as (approximately) 1 cm at 2.1 km, or, directly from the definition, 1 astronomical unit at 1 parsec.

››Definition: Radian

In mathematics and physics, the radian is a unit of angle measure. It is the SI derived unit of angle. It is defined as the angle subtended at the center of a circle by an arc of circumference equal in length to the radius of the circle. Angle measures in radians are often given without any explicit unit. When a unit is given, sometimes the abbreviation rad is used, sometimes the symbol c (for "circular").

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