Pluto’s satellite system
E481636
Pluto’s satellite system is the collection of natural moons orbiting the dwarf planet Pluto, dominated by the large moon Charon and accompanied by the smaller satellites Styx, Nix, Kerberos, and Hydra.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Pluto system | 7 |
| Pluto–Charon system | 4 |
| Pluto-Charon small moons system | 1 |
| Pluto’s satellite system canonical | 1 |
| Pluto’s small moons | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4943334 — 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: Pluto’s satellite system Context triple: [Kerberos, partOf, Pluto’s satellite system]
-
A.
Kuiper Belt object Arrokoth
Kuiper Belt object Arrokoth is a distant, bilobed trans-Neptunian world famously visited and imaged in detail by NASA’s New Horizons spacecraft after its Pluto flyby.
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B.
Jovian satellite system
The Jovian satellite system is the extensive collection of natural moons orbiting the planet Jupiter, ranging from the large Galilean moons to numerous smaller irregular satellites.
-
C.
pula–thebe system
The pula–thebe system is the decimal currency structure of Botswana, in which the pula is the primary unit and the thebe is its subdivision.
-
D.
Kuiper Belt objects
Kuiper Belt objects are icy celestial bodies orbiting the Sun beyond Neptune, thought to be remnants from the early solar system and the source of many short-period comets.
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E.
Pluto
Pluto is a distant, icy dwarf planet in the Kuiper Belt known for its eccentric orbit and former status as the ninth planet of the Solar System.
- 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: Pluto’s satellite system Target entity description: Pluto’s satellite system is the collection of natural moons orbiting the dwarf planet Pluto, dominated by the large moon Charon and accompanied by the smaller satellites Styx, Nix, Kerberos, and Hydra.
-
A.
Kuiper Belt object Arrokoth
Kuiper Belt object Arrokoth is a distant, bilobed trans-Neptunian world famously visited and imaged in detail by NASA’s New Horizons spacecraft after its Pluto flyby.
-
B.
Jovian satellite system
The Jovian satellite system is the extensive collection of natural moons orbiting the planet Jupiter, ranging from the large Galilean moons to numerous smaller irregular satellites.
-
C.
pula–thebe system
The pula–thebe system is the decimal currency structure of Botswana, in which the pula is the primary unit and the thebe is its subdivision.
-
D.
Kuiper Belt objects
Kuiper Belt objects are icy celestial bodies orbiting the Sun beyond Neptune, thought to be remnants from the early solar system and the source of many short-period comets.
-
E.
Pluto
Pluto is a distant, icy dwarf planet in the Kuiper Belt known for its eccentric orbit and former status as the ninth planet of the Solar System.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf | natural satellite system ⓘ |
| centralBody | Pluto NERFINISHED ⓘ |
| contains |
Charon
NERFINISHED
ⓘ
Hydra NERFINISHED ⓘ Kerberos NERFINISHED ⓘ Nix NERFINISHED ⓘ Styx NERFINISHED ⓘ |
| discoveredBy | multiple discovery teams ⓘ |
| dominantSatellite | Charon NERFINISHED ⓘ |
| forms | Pluto–Charon binary system NERFINISHED ⓘ |
| hasApproximateCharonOrbitalPeriod | 6.4 Earth days ⓘ |
| hasApproximateCharonToPlutoMassRatio | 0.12 ⓘ |
| hasApproximateCharonToPlutoSizeRatio | 0.5 ⓘ |
| hasApproximateHydraOrbitalPeriod | 38.2 Earth days ⓘ |
| hasApproximateKerberosOrbitalPeriod | 32.2 Earth days ⓘ |
| hasApproximateNixOrbitalPeriod | 24.9 Earth days ⓘ |
| hasApproximateStyxOrbitalPeriod | 20.2 Earth days ⓘ |
| hasBarycenterLocation | outside Pluto’s physical radius ⓘ |
| hasDiscoveryInstrument | Hubble Space Telescope NERFINISHED ⓘ |
| hasDiscoveryYearOfCharon | 1978 ⓘ |
| hasDiscoveryYearOfKerberos | 2011 ⓘ |
| hasDiscoveryYearOfNixAndHydra | 2005 ⓘ |
| hasDiscoveryYearOfStyx | 2012 ⓘ |
| hasDynamicalStability | long-term stable orbits for known moons ⓘ |
| hasExplorationMission | New Horizons NERFINISHED ⓘ |
| hasInclinationRelativeToEcliptic | about 119 degrees (Pluto’s equator) ⓘ |
| hasLargestMoon | Charon NERFINISHED ⓘ |
| hasLikelyOrigin | giant impact between proto-Pluto and another Kuiper belt object ⓘ |
| hasOrbitalConfiguration | near-resonant chain of small moons ⓘ |
| hasOrbitalPlane | approximately aligned with Pluto’s equator ⓘ |
| hasOrbitalResonancePattern | near 1:3:4:5:6 period ratios among moons ⓘ |
| hasPrimaryTidalLocking | Pluto–Charon mutually tidally locked ⓘ |
| hasSmallMoonsRotationState |
small moons exhibit chaotic rotation
ⓘ
small moons not tidally locked ⓘ |
| hasSmallSatellite |
Hydra
NERFINISHED
ⓘ
Kerberos NERFINISHED ⓘ Nix NERFINISHED ⓘ Styx NERFINISHED ⓘ |
| locatedIn |
Kuiper belt
NERFINISHED
ⓘ
outer Solar System ⓘ |
| NewHorizonsFlybyDate | 2015-07-14 ⓘ |
| numberOfKnownMoons | 5 ⓘ |
| orbits | Pluto NERFINISHED ⓘ |
| wasImagedCloselyBy | New Horizons spacecraft NERFINISHED ⓘ |
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: Pluto’s satellite system Description of subject: Pluto’s satellite system is the collection of natural moons orbiting the dwarf planet Pluto, dominated by the large moon Charon and accompanied by the smaller satellites Styx, Nix, Kerberos, and Hydra.
Referenced by (14)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Pluto–Charon system
this entity surface form:
Pluto–Charon system
this entity surface form:
Pluto–Charon system
this entity surface form:
Pluto system
this entity surface form:
Pluto system
subject surface form:
Hydra (moon)
this entity surface form:
Pluto system
subject surface form:
Hydra (moon)
this entity surface form:
Pluto–Charon system
this entity surface form:
Pluto system