Units of solid angle

Spat (angular unit)

The spat (symbol sp), from the Latin spatium ("space"), is a unit of solid angle. 1 spat is equal to 4π steradians or approximately 41253 square degrees of solid angle (sequence in the OEIS). Thus it is the solid angle subtended by a complete sphere at its center. (Wikipedia).

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Related pages

Steradian | Square degree | Turn (angle) | Sphere | Solid angle | Radian