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Planet Neptune

How big is Triton?


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The moon Triton - a moon of Neptune is the seventh largest moon in the solar system.

It has:

  • Radius: 1,353.5km (841 miles)
  • Diameter: 2,706km (1,682 miles)

This is about a fifth of the Earth and slightly smaller than our own Moon.

See related link for a pictorial size difference.