During the opposition on June 15, 2017, Saturn was at a distance of 9.01 AU from Earth. e. The angular diameter was approximately 18 “

During the opposition on June 15, 2017, Saturn was at a distance of 9.01 AU from Earth. e. The angular diameter was approximately 18 “. Based on this data, calculate the linear equatorial diameter of the planet.

Angular dimensions must be expressed in radian units.
18 “= 18 * 1 / 206265rad = 9 * 10 ^ -5rad; d = Dp = 9.01 a.u. * 1.5 * 10 ^ 8km / a.u. * 9 * 10 ^ -5 = 1, 2 * 10 ^ 5km.

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