Proteus

Proteus — moon orbiting Neptune, explore its interactive 3D model in Cosmoscope.

Explore Proteus in a live 3D Solar System. Follow its calculated motion and inspect real astronomical data, distances and orbital facts.

Bigger than Mimas yet still a lump: Proteus sits right at the size where gravity almost — but not quite — pulls a world into a sphere.

Radius

210 km

Orbit

118k km from Neptune

Period

1.12 days

Rank

Neptune’s second-largest moon

Shape

About as big as a body can be and stay lumpy

Explore Proteus in 3D

Cosmoscope places Proteus in the Solar System using astronomical ephemeris or orbital elements, updated for the simulation time. Explore its calculated motion, distance and orbital facts in the interactive 3D view. Accuracy depends on the orbital model and its valid time range.