Proteus

Natural satellite of Neptune


Originally named 1989N1 when it was discovered in Voyager 2 data.

Mean distance from Neptune 117,600 km
Diameter 416 km
Sidereal Period (month) 1.121 Earth-days
Orbital inclination 0
Orbital eccentricity 0
Albedo 0.050
visual magnitude (from Earth) 20


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