Full name: milliarcsecond
Plural form: milliarcseconds
Symbol: msec
Category type: angle
Scale factor: 4.8481368110954E-9
The SI derived unit for angle is the radian.
1 radian is equal to 206264806.2471 milliarcsecond.
Valid units must be of the angle type.
You can use this form to select from known units:
The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.
So 1 milliarcsecond = 10-3 arcsecond.