Rhea

E148112

Rhea is the second-largest moon of Saturn, an icy, heavily cratered satellite discovered in 1672 by Giovanni Domenico Cassini.

All labels observed (2)

Label Occurrences
Rhea canonical 6
Juno 1

How this entity was disambiguated

Statements (49)

Predicate Object
instanceOf astronomical object
moon of Saturn
natural satellite
albedo high
averageOrbitalDistanceFromSaturn_km 527000
axialTilt_degrees 0
belongsToPlanetarySystem Saturnian system
Solar System
celestialBodyType icy moon
diameter_km 1527.6
discoverer Giovanni Domenico Cassini
discoveryDate 1672
discoveryMethod telescopic observation
equatorialCircumference_km ~4800
escapeVelocity_km_per_s 0.635
exosphereComponent carbon dioxide
oxygen
geologicalCharacteristic bright icy plains
heavily cratered surface
tectonic features
hasAtmosphere tenuous exosphere
hasBeenVisitedBy Cassini–Huygens
Voyager 1
Voyager 2
IAUDesignation Saturn V
isMajorMoonOf Saturn
mass_kg 2.3065e21
meanDensity_g_per_cm3 1.236
meanRadius_km 763.8
namedAfter Rhea
surface form: Rhea (Titaness from Greek mythology)
orbitalEccentricity 0.0012583
orbitalInclination_degrees 0.345
orbitalPeriod_days 4.518
orbits Saturn
primary Saturn
rankBySizeAroundSaturn second-largest moon of Saturn
relativePositionFromSaturn orbits beyond Tethys
orbits inside Titan
rotationPeriod_days 4.518
rotationPeriodEqualsOrbitalPeriod true
semiMajorAxis_km 527108
surfaceComposition rocky material
water ice
surfaceFeatureType chasmata
impact craters
surfaceGravity_m_per_s2 0.264
surfaceTemperature_K ~53–99
synchronousRotation true
tidallyLockedTo Saturn

How these facts were elicited

Referenced by (7)

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

Saturn hasMajorMoon Rhea
Uranus parentOf Rhea
Pluto (Roman god of the underworld) sibling Rhea
subject surface form: Pluto
this entity surface form: Juno
Phoebe siblingOf Rhea