Unit Descriptions

1 Degree (of arc):1 degree of arc is define as 1/360 of a revolution. In SI units 1° is π/180 radians.

1 Arcsecond:1 Arcsecond is equal to exactly one thirtysix-hundredth arc degrees (1°/3600). In terms of radians (SI unit) this is π/648000 rad or approximately 4.848 137 x 10^-6 rad.