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Proteus

Aphelion	N/A
Periphelion	N/A
Inclination	0.04°
Mass	5 x 10¹⁹ kg
Mean Radius	210 km
Sideral Orbit	1.12 days
Sideral Rotation	0 hrs

English NameProteusName DetailNamed after Proteus, the shape-changing sea god of Greek mythology.Discovered ByStephen P. Synnott, Bradford A. SmithDiscovery Date16/06/1989Body TypeMoonPlanet English NameNeptune