Ligeia Mare
E49257
Ligeia Mare is one of the largest known hydrocarbon seas on Saturn’s moon Titan, composed primarily of liquid methane and ethane.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ligeia Mare canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T304819 — 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: Ligeia Mare Context triple: [Titan, majorSea, Ligeia Mare]
-
A.
Lake Velence
Lake Velence is one of Hungary’s largest natural lakes, known as a popular resort and recreation area in the Transdanubian region.
-
B.
Sea of Azov
The Sea of Azov is a shallow inland sea in Eastern Europe connected to the Black Sea, bordered by Ukraine and Russia and known for its strategic and economic importance.
-
C.
Lake Ladoga
Lake Ladoga is a vast freshwater lake in northwestern Russia, renowned as the largest lake in Europe and an important ecological and historical region.
-
D.
Baltic Ice Lake
The Baltic Ice Lake was a large proglacial lake that existed at the end of the last Ice Age in the area now occupied by the northern Baltic Sea.
-
E.
Caspian Sea
The Caspian Sea is the world’s largest inland body of water, a landlocked saltwater lake situated between Europe and Asia and bordered by several countries including Russia, Kazakhstan, Turkmenistan, Iran, and Azerbaijan.
- 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: Ligeia Mare Target entity description: Ligeia Mare is one of the largest known hydrocarbon seas on Saturn’s moon Titan, composed primarily of liquid methane and ethane.
-
A.
Lake Velence
Lake Velence is one of Hungary’s largest natural lakes, known as a popular resort and recreation area in the Transdanubian region.
-
B.
Sea of Azov
The Sea of Azov is a shallow inland sea in Eastern Europe connected to the Black Sea, bordered by Ukraine and Russia and known for its strategic and economic importance.
-
C.
Lake Ladoga
Lake Ladoga is a vast freshwater lake in northwestern Russia, renowned as the largest lake in Europe and an important ecological and historical region.
-
D.
Baltic Ice Lake
The Baltic Ice Lake was a large proglacial lake that existed at the end of the last Ice Age in the area now occupied by the northern Baltic Sea.
-
E.
Caspian Sea
The Caspian Sea is the world’s largest inland body of water, a landlocked saltwater lake situated between Europe and Asia and bordered by several countries including Russia, Kazakhstan, Turkmenistan, Iran, and Azerbaijan.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
extraterrestrial sea
ⓘ
hydrocarbon sea ⓘ surface feature on Titan ⓘ |
| associatedWithProcess |
Titan methane cycle
ⓘ
evaporation and precipitation of hydrocarbons ⓘ |
| belongsToSystem |
Saturn system
ⓘ
linked to:
Saturn
|
| celestialBody | Titan ⓘ |
| chemicalEnvironment | reducing ⓘ |
| composedPrimarilyOf |
liquid ethane
ⓘ
liquid methane ⓘ |
| contains | hydrocarbons ⓘ |
| coordinateSystem | Titan planetocentric coordinates ⓘ |
| discoveredBy |
Cassini–Huygens mission
ⓘ
linked to:
Cassini–Huygens
|
| environmentType | cryogenic hydrocarbon environment ⓘ |
| featureType | mare ⓘ |
| fluidType | non-water liquid ⓘ |
| hasApproximateArea | about 126000 square kilometers ⓘ |
| hasBathymetry | measured depths by radar sounding ⓘ |
| hasNeighbor |
Kraken Mare
ⓘ
Punga Mare ⓘ |
| hasScientificInterest |
climate and weather patterns on Titan
ⓘ
potential habitability of hydrocarbon solvents ⓘ |
| hasShoreline | complex coastline ⓘ |
| imagedIn | radar wavelengths ⓘ |
| isLargerThan | Lake Superior ⓘ |
| isOneOf | largest known seas on Titan ⓘ |
| locatedIn | northern hemisphere of Titan ⓘ |
| locatedInAtmosphericContext | dense nitrogen–methane atmosphere of Titan ⓘ |
| locatedNear |
Titan’s north pole
ⓘ
linked to:
Titan’s north polar seas
|
| locatedOn | Titan ⓘ |
| mappedBy |
Cassini radar altimetry
ⓘ
linked to:
Cassini–Huygens
|
| maximumDepthEstimate | hundreds of meters ⓘ |
| namedAfter | Ligeia ⓘ |
| nameOrigin | Ligeia from Greek mythology ⓘ |
| observedBy |
Cassini spacecraft
ⓘ
linked to:
Cassini–Huygens
|
| observedUsing |
Cassini radar instrument
ⓘ
linked to:
Cassini–Huygens
|
| orbitsWithPrimary | Saturn ⓘ |
| partOf |
Titan northern polar lake district
ⓘ
linked to:
Titan’s north polar seas
|
| phaseOfMethane | liquid methane at Titan surface conditions ⓘ |
| pressureCondition | about 1.5 bar at Titan surface ⓘ |
| studiedFor |
comparative planetology of seas and lakes
ⓘ
prebiotic chemistry ⓘ |
| surfaceGravityContext | low gravity environment of Titan ⓘ |
| surfaceInteraction | contact with Titan icy crust ⓘ |
| surfaceState | liquid ⓘ |
| temperatureCondition | cryogenic ⓘ |
| temperatureEstimate | around 90 to 95 Kelvin ⓘ |
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: Ligeia Mare Description of subject: Ligeia Mare is one of the largest known hydrocarbon seas on Saturn’s moon Titan, composed primarily of liquid methane and ethane.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.