Neptune VIII

E506475
moon of Neptune natural satellite

Neptune VIII is the Roman numeral designation for Proteus, one of Neptune’s largest and irregularly shaped moons.

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Observed surface forms (1)

Surface form Occurrences
Neptune VIII Proteus 1

Statements (25)

Predicate Object
instanceOf moon of Neptune ⓘ
natural satellite ⓘ
albedo low ⓘ
alsoKnownAs Proteus NERFINISHED ⓘ
approximateDimensions_km about 436 × 416 × 402 ⓘ
belongsToPlanetarySystem Neptune system ⓘ
discoveredBy Stephen P. Synnott NERFINISHED ⓘ
Voyager 2 NERFINISHED ⓘ
Voyager 2 imaging team NERFINISHED ⓘ
discoveredDuring Voyager 2 Neptune flyby NERFINISHED ⓘ
discoveryDate 1989-07-07 ⓘ
discoveryMethod spacecraft imaging ⓘ
eccentricity low ⓘ
inclination small relative to Neptune’s equator ⓘ
meanRadius_km approximately 210 ⓘ
namedAfter Proteus (mythology) NERFINISHED ⓘ
orbitalPeriod_days approximately 1.122 ⓘ
orbits Neptune NERFINISHED ⓘ
rankBySizeAroundNeptune second largest moon of Neptune ⓘ
rotationPeriod_days approximately 1.122 ⓘ
rotationState synchronous rotation ⓘ
semiMajorAxis_km approximately 117600 ⓘ
shape irregular ⓘ
surfaceColor dark ⓘ
surfaceFeatures heavily cratered ⓘ

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Proteus → catalogDesignation → Neptune VIII ⓘ
subject surface form: Proteus (moon)
Proteus → alternativeName → Neptune VIII ⓘ
subject surface form: Proteus (moon)
this entity surface form: Neptune VIII Proteus