What is the weight of an object on the surface of a planet with radius r?

The weight of an object on the surface of a planet with radius r is determined by the planet's mass and the object's distance from the planet's center. The weight can be calculated using the formula W (G M m) / r2, where W is the weight, G is the gravitational constant, M is the planet's mass, m is the object's mass, and r is the radius of the planet.