angular radius

angular radius

[′aŋ·gyə·lər ′rād·ē·əs]
(mathematics)
For a circle drawn on a sphere, the smaller of the angular distances from one of the two poles of the circle to any point on the circle.
References in periodicals archive ?
He estimated the angular radius of the brighter of Mizar's components to be 3 arcseconds and wrongly assumed that this represented the star's actual disk.
On May 10th the Sun's angular radius, r, was 15' 50".