Pioneer 10
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On July 18, 2023, Voyager 2 overtook Pioneer 10, making Pioneer 10 the third farthest spacecraft from the Sun after Voyager 1 and Voyager 2. As of July 2025, the probe is estimated to be 139.7 AU (20.9 billion km; 13.0 billion mi) from Earth and 139 AU (20.8 billion km; 12.9 billion mi) from the Sun. Sunlight takes 18.9 hours to reach Pioneer 10. The brightness of the Sun from the spacecraft is magnitude −16.0. Pioneer 10 is curr