How many arcsecond in 1 milliarcsecond? The answer is 0.001. We assume you are converting between arcsecond and milliarcsecond. You can view more details on each measurement unit: arcsecond or milliarcsecond The SI derived unit for angle is the radian. 1 radian is equal to 206264.8062471 arcsecond, or 206264806.2471 milliarcsecond. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between arcseconds and milliarcseconds. Type in your own numbers in the form to convert the units!
1 arcsecond to milliarcsecond = 1000 milliarcsecond
2 arcsecond to milliarcsecond = 2000 milliarcsecond
3 arcsecond to milliarcsecond = 3000 milliarcsecond
4 arcsecond to milliarcsecond = 4000 milliarcsecond
5 arcsecond to milliarcsecond = 5000 milliarcsecond
6 arcsecond to milliarcsecond = 6000 milliarcsecond
7 arcsecond to milliarcsecond = 7000 milliarcsecond
8 arcsecond to milliarcsecond = 8000 milliarcsecond
9 arcsecond to milliarcsecond = 9000 milliarcsecond
10 arcsecond to milliarcsecond = 10000 milliarcsecond
You can do the reverse unit conversion from milliarcsecond to arcsecond, or enter any two units below:
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.
The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.
So 1 milliarcsecond = 10-3 arcsecond.
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