Proteus
E118790
Proteus is one of Neptune’s largest irregularly shaped moons, known for its dark surface and heavily cratered, ancient terrain.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Proteus canonical | 7 |
| Proteus (mythology) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1000476 — 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: Proteus Context triple: [Neptune, moon, Proteus]
-
A.
Proteus
Proteus is the nickname of Charles Proteus Steinmetz, a pioneering German-American electrical engineer and mathematician renowned for his foundational work in alternating current (AC) power systems.
-
B.
Proteus
Proteus is an experimental high-altitude, long-endurance aircraft designed by Scaled Composites for telecommunications, reconnaissance, and research missions.
-
C.
Calliope
Calliope is the Muse of epic poetry in Greek mythology, often depicted as the chief of the nine Muses and associated with eloquence and heroic verse.
-
D.
Praxeas
Praxeas was an early Christian theologian known for promoting a modalistic view of the Trinity that was later deemed heretical by mainstream church authorities.
-
E.
Spyridium
Spyridium is a genus of flowering shrubs native mainly to Australia, known for their small, clustered flowers and often woolly or hairy foliage.
- 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: Proteus Target entity description: Proteus is one of Neptune’s largest irregularly shaped moons, known for its dark surface and heavily cratered, ancient terrain.
-
A.
Proteus
Proteus is the nickname of Charles Proteus Steinmetz, a pioneering German-American electrical engineer and mathematician renowned for his foundational work in alternating current (AC) power systems.
-
B.
Proteus
Proteus is an experimental high-altitude, long-endurance aircraft designed by Scaled Composites for telecommunications, reconnaissance, and research missions.
-
C.
Calliope
Calliope is the Muse of epic poetry in Greek mythology, often depicted as the chief of the nine Muses and associated with eloquence and heroic verse.
-
D.
Praxeas
Praxeas was an early Christian theologian known for promoting a modalistic view of the Trinity that was later deemed heretical by mainstream church authorities.
-
E.
Spyridium
Spyridium is a genus of flowering shrubs native mainly to Australia, known for their small, clustered flowers and often woolly or hairy foliage.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
irregularly shaped moon
ⓘ
moon of Neptune ⓘ natural satellite ⓘ |
| albedo | low ⓘ |
| alternativeName |
Neptune VIII Proteus
ⓘ
linked to:
Neptune VIII
|
| axialTilt | approximately zero relative to its orbit ⓘ |
| belongsTo | Neptune’s natural satellites ⓘ |
| belongsToPlanetarySystem |
Neptunian system
ⓘ
linked to:
Neptune
|
| catalogDesignation | Neptune VIII ⓘ |
| craterCharacteristic | many large impact craters ⓘ |
| density | about 1.3 g/cm³ ⓘ |
| diameter | about 420 km ⓘ |
| discoveredOn | 1989-07-07 ⓘ |
| discoverer | Voyager 2 ⓘ |
| discoveryContext | Voyager 2 flyby of Neptune in 1989 ⓘ |
| discoveryMethod | spacecraft imaging ⓘ |
| eccentricity | low orbital eccentricity ⓘ |
| escapeVelocity | about 0.23 km/s ⓘ |
| gravitationalBinding | insufficient to form a perfect sphere ⓘ |
| hasAtmosphere | no significant atmosphere detected ⓘ |
| imagedBy | Voyager 2 ⓘ |
| inclination | small inclination relative to Neptune’s equator ⓘ |
| largerOnlyThan | Triton ⓘ |
| largestCraterDiameter | about 230 km ⓘ |
| largestCraterName |
Pharos
ⓘ
linked to:
Lighthouse of Alexandria
|
| likelyOrigin | accreted from a debris disk around Neptune ⓘ |
| locatedIn | outer Solar System ⓘ |
| meanRadius | about 210 km ⓘ |
| namedAfter |
Proteus (mythology)
ⓘ
linked to:
Proteus
|
| orbitalPeriod |
about 1.122 days
ⓘ
about 27 hours ⓘ |
| orbits | Neptune ⓘ |
| orbitsWithin | Neptune’s inner regular satellite system ⓘ |
| rankBySizeAroundNeptune | second largest moon of Neptune ⓘ |
| rotation | synchronous with Neptune ⓘ |
| rotationalPeriod | about 1.122 days ⓘ |
| semiMajorAxis | about 117647 km ⓘ |
| shape | irregular ⓘ |
| spectralType | dark, neutral to slightly bluish ⓘ |
| surfaceAge | geologically old ⓘ |
| surfaceBrightness | very low ⓘ |
| surfaceColor | dark ⓘ |
| surfaceComposition | water ice and dark material (likely organics and silicates) ⓘ |
| surfaceFeature |
ancient terrain
ⓘ
heavily cratered terrain ⓘ |
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: Proteus Description of subject: Proteus is one of Neptune’s largest irregularly shaped moons, known for its dark surface and heavily cratered, ancient terrain.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.