The artificial satellite orbits at a distance of 170 km from the lunar surface. What is the maximum angular distance

The artificial satellite orbits at a distance of 170 km from the lunar surface. What is the maximum angular distance from the Moon at which the satellite is visible to the terrestrial observer? (The linear radius of the Moon is 1700 km, angular 15 ‘.)

decision
q1 / q2 = r1 / r2
q1 = 15 * 60 “* 170/1700 = 90”

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