Laplace plane
E642788
The Laplace plane is the equilibrium reference plane about which a satellite’s orbital plane precesses under the combined influence of a planet’s oblateness and external gravitational perturbations.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Laplace plane canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7100008 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Laplace plane Context triple: [Laplace resonance, relatedTo, Laplace plane]
-
A.
Laplace resonance
Laplace resonance is a three-body orbital resonance in which the orbital periods of Jupiter’s moons Io, Europa, and Ganymede are linked in a precise 1:2:4 ratio, strongly affecting their dynamics and internal heating.
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B.
Lissajous orbit
A Lissajous orbit is a stable, looping three-dimensional trajectory around a Lagrange point, commonly used by space observatories to maintain a relatively constant position with respect to Earth and the Sun.
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C.
Clarke orbit
A Clarke orbit is a geostationary orbit directly above Earth's equator where a satellite appears fixed over one point on the surface, enabling continuous communication coverage.
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D.
Laplace Gap
The Laplace Gap is a narrow, relatively faint gap within Saturn’s rings, located inside the broader Cassini Division and shaped by gravitational resonances with Saturn’s moons.
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E.
Sun–Earth L2
Sun–Earth L2 is a gravitationally stable point in space located beyond Earth's orbit where the combined gravity of the Sun and Earth allows spacecraft, such as the James Webb Space Telescope, to maintain a relatively constant position with minimal fuel use.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Laplace plane Target entity description: The Laplace plane is the equilibrium reference plane about which a satellite’s orbital plane precesses under the combined influence of a planet’s oblateness and external gravitational perturbations.
-
A.
Laplace resonance
Laplace resonance is a three-body orbital resonance in which the orbital periods of Jupiter’s moons Io, Europa, and Ganymede are linked in a precise 1:2:4 ratio, strongly affecting their dynamics and internal heating.
-
B.
Lissajous orbit
A Lissajous orbit is a stable, looping three-dimensional trajectory around a Lagrange point, commonly used by space observatories to maintain a relatively constant position with respect to Earth and the Sun.
-
C.
Clarke orbit
A Clarke orbit is a geostationary orbit directly above Earth's equator where a satellite appears fixed over one point on the surface, enabling continuous communication coverage.
-
D.
Laplace Gap
The Laplace Gap is a narrow, relatively faint gap within Saturn’s rings, located inside the broader Cassini Division and shaped by gravitational resonances with Saturn’s moons.
-
E.
Sun–Earth L2
Sun–Earth L2 is a gravitationally stable point in space located beyond Earth's orbit where the combined gravity of the Sun and Earth allows spacecraft, such as the James Webb Space Telescope, to maintain a relatively constant position with minimal fuel use.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
celestial mechanics concept
ⓘ
reference plane ⓘ |
| appliesTo |
artificial satellites
ⓘ
natural satellites ⓘ planetary ring particles ⓘ |
| characterizedBy |
constant mean inclination of a satellite’s orbit with respect to the plane
ⓘ
precession of orbital node about the plane ⓘ |
| consideredIn |
analysis of irregular satellite systems
ⓘ
design of high-altitude satellite orbits ⓘ dynamics of Uranian and Jovian ring systems ⓘ |
| coordinateSystem | often used as reference plane for Laplace-plane coordinates ⓘ |
| definedAs | equilibrium reference plane about which a satellite’s orbital plane precesses ⓘ |
| definedBy | balance between planetary oblateness and external gravitational perturbations ⓘ |
| dependsOn |
mass and distance of external perturbers
ⓘ
mass of the central planet ⓘ planet’s J2 gravitational harmonic ⓘ planet’s obliquity ⓘ planet’s orbital radius around the Sun ⓘ semi-major axis of the satellite ⓘ |
| hasCause |
external gravitational perturbations
ⓘ
planetary equatorial bulge ⓘ planetary oblateness ⓘ satellite-satellite gravitational perturbations ⓘ solar gravitational perturbations ⓘ |
| hasProperty |
interpolates between planet’s equatorial plane and orbital plane
ⓘ
is a secular equilibrium configuration ⓘ minimizes long-term inclination oscillations of orbits ⓘ orientation varies with orbital radius ⓘ |
| hasSpecialCase |
equatorial plane when oblateness dominates strongly
ⓘ
planet’s orbital plane when external perturbations dominate strongly ⓘ |
| mathematicallyDescribedBy | averaged disturbing function in celestial mechanics ⓘ |
| namedAfter | Pierre-Simon Laplace ⓘ |
| relatedTo |
J2 perturbation
ⓘ
Laplace surface ⓘ Laplace–Lagrange theory ⓘ
linked to:
Lagrange’s planetary equations
nodal precession ⓘ secular perturbation theory ⓘ |
| relativeTo |
planet’s equatorial plane
ⓘ
planet’s orbital plane around the Sun ⓘ |
| timeScale | secular (long-term) orbital evolution ⓘ |
| usedFor |
defining reference frames for satellite systems
ⓘ
interpreting observed inclinations of moons ⓘ modeling long-term orbital evolution ⓘ studying stability of planetary rings ⓘ |
| usedIn |
celestial mechanics
ⓘ
orbital dynamics ⓘ planetary ring dynamics ⓘ satellite theory ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Laplace plane Description of subject: The Laplace plane is the equilibrium reference plane about which a satellite’s orbital plane precesses under the combined influence of a planet’s oblateness and external gravitational perturbations.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.