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Proteus

Neptune VIII

Proper NameProteus
DesignationNeptune VIII
Primary PlanetNeptune
Orbital Period26 hours, 56 minutes
Mean Distance from Neptune118,000 km
73,000 miles
Rotation Period26 hours, 56 minutes (synchronous orbit)
Mean Diameter403 km
251 miles
NotesThe second largest of Neptune's moons after Triton, and probably formed during the capture of that large moon by Neptune.

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