Hyperion

E28501

Hyperion is one of Saturn’s larger, irregularly shaped moons, known for its chaotic rotation and sponge-like, heavily cratered surface.

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All labels observed (2)

Label Occurrences
Hyperion canonical 8
Hyperionides 1

Statements (49)

Predicate Object
instanceOf irregular satellite
moon of Saturn
natural satellite
albedo low
axialTilt chaotic
belongsToPlanetarySystem Saturn
surface form: Saturnian system
catalogDesignation Saturn VII
celestialBodyType irregularly shaped moon
closestApproachByCassini_km ~500
color reddish-brown
dimension_km 360 × 280 × 225
discoveredBy George Phillips Bond
William Cranch Bond
William Lassell
discoveryDate 1848-09-16
discoverySite United States of America
surface form: United States
escapeVelocity_m_per_s 24
hasChaoticRotation true
hasHeavilyCrateredSurface true
hasIrregularShape true
mass_kg 5.6e18
meanDensity_g_per_cm3 0.54
meanPorosity_percent ~40
meanRadius_km 135
mythologicalAssociation Hyperion
surface form: Titan Hyperion
namedAfter Hyperion
surface form: Hyperion from Greek mythology
notableProperty chaotic tumbling motion
low density compared to solid ice
spongy, porous structure
orbitalEccentricity 0.1042
orbitalInclination_deg 0.43
orbitalPeriod_days 21.276
orbitalResonanceRatio 4:3 with Titan
orbits Saturn
parentPlanet Saturn
porosity very high
resonanceWith Titan
rotationState chaotic rotation
satelliteOf Saturn
semiMajorAxis_km 1481000
shape highly irregular
surfaceAppearance sponge-like
surfaceComposition dark organic-rich material
water ice
surfaceFeature heavily cratered terrain
surfaceGravity_m_per_s2 0.017
synchronousRotation false
visitedBy Cassini–Huygens
Voyager 2

Referenced by (9)

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

Iapetus sibling Hyperion
Helios epithet Hyperion
this entity surface form: Hyperionides
Saturn hasMajorMoon Hyperion
Cassini–Huygens studiedMoon Hyperion
Shopgirl publisher Hyperion
Brain Droppings publisher Hyperion
Phoebe siblingOf Hyperion
Saturn VII alsoKnownAs Hyperion
William Lassell discovered Hyperion