Saturnian moon Hyperion
E620989
Hyperion is an irregularly shaped, chaotically rotating moon of Saturn known for its sponge-like, heavily cratered surface.
Observed surface forms (1)
| Surface form | Occurrences |
|---|---|
| Hyperion | 0 |
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Saturnian moon
ⓘ
irregular moon ⓘ natural satellite ⓘ |
| albedo | geometric albedo about 0.3 ⓘ |
| axialTilt | variable due to chaotic rotation ⓘ |
| belongsToGroup | outer irregularly shaped moons of Saturn ⓘ |
| belongsToPlanetarySystem | Saturn system NERFINISHED ⓘ |
| catalogDesignation | Saturn VII NERFINISHED ⓘ |
| causesPhenomenon | chaotic rotation due to resonance with Titan ⓘ |
| closeFlybyBy | Cassini on 2005-09-26 ⓘ |
| color | reddish-brown tint ⓘ |
| composition |
low-density porous ice and rock mixture
ⓘ
water ice-rich body ⓘ |
| dimensions | about 360 × 280 × 225 km ⓘ |
| discoveredBy |
George Phillips Bond
NERFINISHED
ⓘ
William Cranch Bond NERFINISHED ⓘ William Lassell NERFINISHED ⓘ |
| discoveredUsing | ground-based telescopes ⓘ |
| discoveryDate | 1848-09-16 ⓘ |
| escapeVelocity | about 0.1 km/s ⓘ |
| gravitationalInteractionWith | Titan NERFINISHED ⓘ |
| hasNo | substantial atmosphere ⓘ |
| imagedBy |
Cassini spacecraft
NERFINISHED
ⓘ
Voyager 2 spacecraft NERFINISHED ⓘ |
| mass | about 5.6 × 10^18 kg ⓘ |
| meanDensity | about 0.54 g/cm³ ⓘ |
| meanRadius | approximately 135 km ⓘ |
| namedAfter | Hyperion (Titan from Greek mythology) NERFINISHED ⓘ |
| orbitalEccentricity | about 0.104 ⓘ |
| orbitalInclination | about 0.43 degrees to Saturn’s equator ⓘ |
| orbitalPeriod | about 21.28 Earth days ⓘ |
| orbitalResonanceType | 4:3 mean-motion resonance with Titan ⓘ |
| orbitalResonanceWith | Titan NERFINISHED ⓘ |
| orbits | Saturn NERFINISHED ⓘ |
| porosity | very high porosity ⓘ |
| rotationPeriod | non-uniform due to chaotic rotation ⓘ |
| rotationState | chaotic rotation ⓘ |
| semiMajorAxis | about 1,481,000 km from Saturn ⓘ |
| shape | irregular ⓘ |
| surfaceAge | ancient, heavily cratered surface ⓘ |
| surfaceAppearance | sponge-like ⓘ |
| surfaceFeature |
dark material in crater floors
ⓘ
deep, sharp-edged craters ⓘ heavily cratered terrain ⓘ |
| surfaceGravity | about 0.017 m/s² ⓘ |
| surfaceRegolith | very low-density, fluffy regolith ⓘ |
| surfaceTemperature | approximately 70–90 K ⓘ |
| synchronousRotation | false ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.