Triton

Moon

Neptune's largest moon, notable for orbiting backwards relative to the planet's rotation.

Facts

TypeMoon
OrbitsNeptune
Distance from parent body354,759 km
Diameter2,707 km
Mass2.14 × 10^22 kg
Surface gravity0.78 m/s²
Temperature-235°C
Orbital period6 days
Apparent magnitude13.5
Redshift0
Discovered1846

Triton in context

At 2,707 km across, Triton is 78 percent of the diameter of Earth's Moon.

Its mass is 0.4 percent of the mass of Earth.

It orbits Neptune at 354,759 km, closer in than the Moon orbits Earth.

A single orbit takes 5.9 days.

An average temperature of 38 K works out at -235 degrees Celsius, colder than the 15 degrees Earth averages.

It has been on record since 1846.

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