Phoebe (moon of Saturn)
E557044
Phoebe (moon of Saturn) is an irregular, retrograde outer moon of Saturn believed to be a captured object from the Kuiper Belt, notable for its dark surface and heavily cratered terrain.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Phoebe (moon of Saturn) canonical | 1 |
| Phoebe (moon) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5927809 — 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: Phoebe (moon of Saturn) Context triple: [Phoebe, notSameAs, Phoebe (moon of Saturn)]
-
A.
Methone (Magnesia)
Methone (Magnesia) is an ancient Greek town in the region of Magnesia in Thessaly, known from classical historical and geographical sources.
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B.
Dione
Dione is an icy mid-sized moon of Saturn known for its bright, heavily cratered surface and extensive system of fractures and cliffs.
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C.
Dione
Dione is a figure in Greek mythology often regarded as a Titaness or early goddess associated with oracular power and sometimes identified as the mother of Aphrodite.
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D.
Mimas
Mimas is a small, heavily cratered icy moon of Saturn best known for its large Herschel crater, which gives it a distinctive "Death Star"-like appearance.
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E.
Mimas
Mimas is a giant from Greek mythology, often depicted as one of the monstrous offspring of Gaia who fought the Olympian gods in the Gigantomachy.
- 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: Phoebe (moon of Saturn) Target entity description: Phoebe (moon of Saturn) is an irregular, retrograde outer moon of Saturn believed to be a captured object from the Kuiper Belt, notable for its dark surface and heavily cratered terrain.
-
A.
Methone (Magnesia)
Methone (Magnesia) is an ancient Greek town in the region of Magnesia in Thessaly, known from classical historical and geographical sources.
-
B.
Dione
Dione is an icy mid-sized moon of Saturn known for its bright, heavily cratered surface and extensive system of fractures and cliffs.
-
C.
Dione
Dione is a figure in Greek mythology often regarded as a Titaness or early goddess associated with oracular power and sometimes identified as the mother of Aphrodite.
-
D.
Mimas
Mimas is a small, heavily cratered icy moon of Saturn best known for its large Herschel crater, which gives it a distinctive "Death Star"-like appearance.
-
E.
Mimas
Mimas is a giant from Greek mythology, often depicted as one of the monstrous offspring of Gaia who fought the Olympian gods in the Gigantomachy.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
moon of Saturn
ⓘ
natural satellite ⓘ outer moon of Saturn ⓘ retrograde satellite ⓘ |
| albedo_geometric | 0.06 ⓘ |
| associatedStructure | Phoebe ring NERFINISHED ⓘ |
| belongsTo | Solar System NERFINISHED ⓘ |
| belongsToGroup | Norse group of Saturnian moons ⓘ |
| belongsToPlanetarySystem | Saturnian system ⓘ |
| catalogDesignation | Saturn IX NERFINISHED ⓘ |
| density_g_per_cm3 | 1.6 ⓘ |
| discoveredBy | William Henry Pickering NERFINISHED ⓘ |
| discoveryDate | 1899-03-17 ⓘ |
| discoveryMethod | ground-based telescope observations ⓘ |
| discoveryYear | 1899 ⓘ |
| escapeVelocity_m_per_s | 100 ⓘ |
| exploredBy | Cassini–Huygens spacecraft NERFINISHED ⓘ |
| flybyDate | 2004-06-11 ⓘ |
| hasCrater | Jason crater NERFINISHED ⓘ |
| imagedBy | Cassini spacecraft NERFINISHED ⓘ |
| likelyOrigin | captured Kuiper Belt object ⓘ |
| locatedIn | outer Saturnian system ⓘ |
| mass_kg | 8.3e18 ⓘ |
| meanDiameter_km | 213 ⓘ |
| meanOrbitalDistanceFromSaturn_Mm | 12.95 ⓘ |
| meanRadius_km | 106.5 ⓘ |
| meanSurfaceGravity_m_per_s2 | 0.049 ⓘ |
| namedAfter | Phoebe (Titaness from Greek mythology) NERFINISHED ⓘ |
| orbitalDirection | retrograde ⓘ |
| orbitalEccentricity | 0.1634 ⓘ |
| orbitalInclination_degrees | 175.2 ⓘ |
| orbitalPeriod_days | 550.3 ⓘ |
| orbits | Saturn NERFINISHED ⓘ |
| orbitsStar | Sun NERFINISHED ⓘ |
| roleInSystem | source of material for Saturn’s Phoebe ring ⓘ |
| rotationPeriod_hours | 9.27 ⓘ |
| rotationState | not tidally locked to Saturn ⓘ |
| satelliteType | irregular ⓘ |
| semiMajorAxis_km | 12952000 ⓘ |
| shape | roughly spherical but irregular ⓘ |
| spectralType | C-type or D-type like body ⓘ |
| surfaceBrightness | low ⓘ |
| surfaceColor | very dark ⓘ |
| surfaceComposition |
carbon-rich compounds
ⓘ
possible silicates ⓘ water ice mixed with dark material ⓘ |
| surfaceFeature |
heavily cratered terrain
ⓘ
large impact basins ⓘ |
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: Phoebe (moon of Saturn) Description of subject: Phoebe (moon of Saturn) is an irregular, retrograde outer moon of Saturn believed to be a captured object from the Kuiper Belt, notable for its dark surface and heavily cratered terrain.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Phoebe (moon)