Unit Descriptions

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.

1 Revolution (or cycle, full circle, turn, rotation) is equal to exactly 360° (degrees of arc) or 2π radians (SI unit) or 400 gradians or 4 right angles.