Mercury
E18768
Mercury is the smallest and innermost planet in our Solar System, known for its extreme temperature variations and heavily cratered surface.
Aliases (2)
- Mercury orbit ×1
- mercury (Hg) ×1
Statements (65)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
→
inner planet → planet → terrestrial planet → |
| albedoBond |
about 0.12
→
|
| atmosphereType |
exosphere
→
|
| atmosphericComponent |
helium
→
hydrogen → oxygen → potassium → sodium → |
| axialTilt |
about 0.03 degrees
→
|
| belongsToCategory |
innermost planet in the Solar System
→
smallest planet in the Solar System → |
| canTransitSunFromEarth |
yes
→
|
| colorAppearance |
dark gray
→
|
| coreComposition |
large metallic core
→
|
| coreState |
partly molten core
→
|
| crustComposition |
silicate rock
→
|
| density_mean |
about 5.43 grams per cubic centimeter
→
|
| diameter_mean |
about 4,880 kilometers
→
|
| discoveredBy |
prehistoric astronomers
→
|
| distanceFromSun_mean |
about 0.39 astronomical units
→
about 57.9 million kilometers → |
| escapeVelocity |
about 4.25 kilometers per second
→
|
| exploredBy |
BepiColombo
→
MESSENGER → Mariner 10 → |
| firstFlybyBy |
Mariner 10
→
|
| firstFlybyYear |
1974
→
|
| firstOrbiter |
MESSENGER
→
|
| firstOrbiterArrivalYear |
2011
→
|
| hasAtmosphere |
yes
→
|
| hasMagneticField |
yes
→
|
| hasNaturalSatellite |
no known moons
→
|
| hasWaterIce |
yes
→
|
| magneticFieldStrength_surface |
about 1% of Earth’s
→
|
| magneticFieldType |
global dipolar magnetic field
→
|
| mass |
about 3.30 × 10^23 kilograms
→
|
| maxSurfaceTemperature |
about 430 degrees Celsius
→
|
| meanSurfaceTemperature |
about 167 degrees Celsius
→
|
| memberOf |
inner Solar System
→
|
| minSurfaceTemperature |
about −180 degrees Celsius
→
|
| namedAfter |
Mercury (Roman god)
→
|
| observedFrom |
Earth
→
|
| orbitalEccentricity |
about 0.2056
→
|
| orbitalInclinationToEcliptic |
about 7 degrees
→
|
| orbitalPeriod |
about 88 Earth days
→
|
| partOf |
Solar System
→
|
| positionFromSun |
first planet from the Sun
→
|
| radius_mean |
about 2,440 kilometers
→
|
| rotationOrbitResonance |
3:2 spin–orbit resonance
→
|
| siderealRotationPeriod |
about 58.6 Earth days
→
|
| solarDayLength |
about 176 Earth days
→
|
| surfaceArea |
about 7.5 × 10^7 square kilometers
→
|
| surfaceFeature |
Caloris Basin
→
Rupes (scarps) → heavily cratered highlands → intercrater plains → smooth plains → |
| surfaceGravity |
about 3.7 meters per second squared
→
|
| transitFrequencyApprox |
about 13 times per century
→
|
| visibleTo |
naked eye
→
|
| volume |
about 6.1 × 10^10 cubic kilometers
→
|
| waterIceLocation |
permanently shadowed polar craters
→
|
Referenced by (11)
| Subject (surface form when different) | Predicate |
|---|---|
|
Exploring Our Solar System
→
|
coversTopic |
|
BepiColombo
("Mercury orbit")
→
|
destinationOrbit |
|
Sol
→
|
gravitationallyBinds |
|
BepiColombo
→
|
gravityAssistBody |
|
Solar System
→
|
hasComponent |
|
Roman religion
→
|
hasDeity |
|
Solar System
→
|
hasPlanet |
|
type-I superconductors
("mercury (Hg)")
→
|
includeExample |
|
Ptolemaic system
→
|
modelsMotionOf |
|
Hermes
→
|
romanEquivalent |
|
BepiColombo
→
|
target |