The weight of an object depends on the force of gravity acting on it, which is influenced by both the mass of the planet and the distance from its center. In the provided data, the surface gravity of each planet is compared to that of Earth:
- Jupiter: 2.53 times Earth gravity
- Saturn: 1.06 times Earth gravity
- Earth: 1.0 times Earth gravity
- Mars: 0.38 times Earth gravity
Given this information, an object would weigh the most on Jupiter, as it has the highest surface gravity compared to the other planets listed.