Moon
Triton
TypeMoon
Mass2.14 × 10²² kg
Diameter2,707 km
Orbital Radius354,800 km
Orbital Period5.88 days
Rotation Period141.04 hours (retrograde)
Known Moons0
Surface Gravity0.78 m/s²
Average Temp-235 °C
AtmosphereN2 (thin), CH4
Discovered ByWilliam Lassell
Discovery Year1846
About Triton
Neptune largest moon. Orbits backwards (retrograde), suggesting it was captured from the Kuiper Belt. Has active nitrogen geysers. Surface temperature of -235C is the coldest measured surface in the solar system. May have a subsurface ocean. Will eventually spiral into Neptune.
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