Earth–Moon barycenter
E821684
The Earth–Moon barycenter is the common center of mass around which both Earth and the Moon orbit in their mutual gravitational interaction.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical concept
ⓘ
barycenter ⓘ center of mass ⓘ |
| affects |
Earth orientation modeling
ⓘ
lunar orbit modeling ⓘ |
| averageEarthMoonDistance_km | about 384400 ⓘ |
| category |
Astrodynamics
NERFINISHED
ⓘ
Celestial mechanics ⓘ Orbital mechanics ⓘ |
| coordinateSystemOriginFor | some Earth–Moon dynamical models ⓘ |
| definedBy | mutual gravitational interaction of Earth and Moon ⓘ |
| definedInFrame |
Newtonian mechanics
NERFINISHED
ⓘ
general relativity approximations ⓘ |
| distanceFromEarthCenter_fractionOfRadius | about 0.73 GENERATED ⓘ |
| distanceFromEarthCenter_km | about 4670 GENERATED ⓘ |
| distanceFromEarthSurface_km | about 1700 GENERATED ⓘ |
| distanceFromMoonCenter_fractionOfDistance | about 0.90 of average Earth–Moon distance GENERATED ⓘ |
| distanceFromMoonCenter_km | about 379000 GENERATED ⓘ |
| governedBy |
Newton’s law of gravitation
NERFINISHED
ⓘ
conservation of momentum ⓘ |
| gravitationallyBoundSystem | Earth–Moon NERFINISHED ⓘ |
| hasProperty |
moves slightly due to perturbations from Sun and planets
ⓘ
not fixed within Earth due to varying Earth–Moon distance ⓘ |
| hasSymbolicRepresentation | often denoted as Earth–Moon CM or EM barycenter ⓘ |
| isReferencePointFor |
barycentric dynamical time definitions (conceptually)
ⓘ
describing Earth and Moon orbits around each other ⓘ |
| liesCloserTo | Earth NERFINISHED ⓘ |
| liesOnLineBetween |
Earth center
ⓘ
Moon center ⓘ |
| locatedInside | Earth NERFINISHED ⓘ |
| massRatioEarthToMoon | about 81.3 to 1 ⓘ |
| orbits | solar system barycenter NERFINISHED ⓘ |
| orbitsWith |
Earth
NERFINISHED
ⓘ
Moon NERFINISHED ⓘ |
| orbitsWithPeriod |
about 27.3 days relative to stars
ⓘ
about 29.5 days relative to Sun ⓘ |
| partOf | Earth–Moon system NERFINISHED ⓘ |
| relatedTo |
center of mass
ⓘ
solar system barycenter NERFINISHED ⓘ |
| relevantFor |
Earth–Moon evolution models
ⓘ
tidal interaction studies ⓘ |
| usedIn |
celestial mechanics
ⓘ
ephemeris calculations ⓘ orbital dynamics ⓘ solar system barycentric coordinates ⓘ spacecraft navigation ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.