Oceanus Procellarum
E612333
Oceanus Procellarum is a vast lunar mare on the Moon’s near side, notable for its dark basaltic plains and as the landing region of several early space missions.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Oceanus Procellarum canonical | 10 |
| Oceanus Procellarum region | 2 |
| Oceanus Procellarum basin region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6675095 — 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: Oceanus Procellarum Context triple: [Luna 9, landingSite, Oceanus Procellarum]
-
A.
Mare Serenitatis
Mare Serenitatis is a large lunar mare, or basaltic plain, on the Moon’s near side, easily visible from Earth as a dark, circular feature formed by ancient volcanic activity.
-
B.
Mare Internum
Mare Internum is the ancient Roman name for the Mediterranean Sea, the central body of water around which much of classical civilization developed.
-
C.
Mare Imbrium
Mare Imbrium is a vast, dark lunar mare formed by ancient volcanic activity, prominent on the Moon’s near side and notable as the landing site of several Apollo missions.
-
D.
Mare Nectaris
Mare Nectaris is a small, circular lunar mare formed by an ancient impact basin on the Moon’s near side, known for its smooth basaltic plains and role in mapping the Moon’s geological history.
-
E.
Mare Insularum
Mare Insularum is a lunar mare, or basaltic plain, on the Moon’s near side, formed by ancient volcanic activity and located near prominent craters such as Copernicus.
- 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: Oceanus Procellarum Target entity description: Oceanus Procellarum is a vast lunar mare on the Moon’s near side, notable for its dark basaltic plains and as the landing region of several early space missions.
-
A.
Mare Serenitatis
Mare Serenitatis is a large lunar mare, or basaltic plain, on the Moon’s near side, easily visible from Earth as a dark, circular feature formed by ancient volcanic activity.
-
B.
Mare Internum
Mare Internum is the ancient Roman name for the Mediterranean Sea, the central body of water around which much of classical civilization developed.
-
C.
Mare Imbrium
Mare Imbrium is a vast, dark lunar mare formed by ancient volcanic activity, prominent on the Moon’s near side and notable as the landing site of several Apollo missions.
-
D.
Mare Nectaris
Mare Nectaris is a small, circular lunar mare formed by an ancient impact basin on the Moon’s near side, known for its smooth basaltic plains and role in mapping the Moon’s geological history.
-
E.
Mare Insularum
Mare Insularum is a lunar mare, or basaltic plain, on the Moon’s near side, formed by ancient volcanic activity and located near prominent craters such as Copernicus.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | lunar mare ⓘ |
| albedo | low ⓘ |
| boundedBy |
Mare Humorum
NERFINISHED
ⓘ
Mare Imbrium NERFINISHED ⓘ Mare Insularum NERFINISHED ⓘ Mare Nubium NERFINISHED ⓘ |
| containsCrater |
Aristarchus
NERFINISHED
ⓘ
Copernicus NERFINISHED ⓘ Herodotus NERFINISHED ⓘ Kepler NERFINISHED ⓘ Marius NERFINISHED ⓘ |
| containsFeature |
Aristarchus Plateau
NERFINISHED
ⓘ
Reiner Gamma NERFINISHED ⓘ Rimae Marius NERFINISHED ⓘ Rimae Prinz NERFINISHED ⓘ |
| formedBy | ancient volcanic activity ⓘ |
| hasAppearance | dark ⓘ |
| hasDiameter | approximately 2500 km ⓘ |
| hasGeologicalAge |
mostly Imbrian
ⓘ
some Eratosthenian ⓘ |
| hasNotableRegion | Procellarum KREEP Terrane NERFINISHED ⓘ |
| hasSelenographicCoordinates | centered near 18.4°N 57.4°W ⓘ |
| hasShape | irregular ⓘ |
| hasSurfaceComposition | basaltic plains ⓘ |
| hasTectonicFeature |
graben structures
ⓘ
wrinkle ridges ⓘ |
| isLargestOf | lunar maria ⓘ |
| isPartOf | lunar maria ⓘ |
| isProminentIn | full Moon appearance ⓘ |
| locatedOn | Moon NERFINISHED ⓘ |
| locatedOnSide | near side of the Moon ⓘ |
| mappedBy | Galileo Galilei NERFINISHED ⓘ |
| namedIn | 17th century ⓘ |
| nameMeaning | Ocean of Storms NERFINISHED ⓘ |
| namingLanguage | Latin ⓘ |
| observedBy |
Clementine mission
NERFINISHED
ⓘ
Lunar Reconnaissance Orbiter NERFINISHED ⓘ |
| richIn | KREEP materials ⓘ |
| surfaceMaterial | mare basalt ⓘ |
| visibleFrom | Earth NERFINISHED ⓘ |
| wasLandingRegionFor |
Apollo 12
NERFINISHED
ⓘ
Chang'e 5 NERFINISHED ⓘ Luna 9 NERFINISHED ⓘ Surveyor 3 NERFINISHED ⓘ |
| wasLandingRegionFor |
Luna 13
NERFINISHED
ⓘ
Surveyor 1 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: Oceanus Procellarum Description of subject: Oceanus Procellarum is a vast lunar mare on the Moon’s near side, notable for its dark basaltic plains and as the landing region of several early space missions.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Mare Cognitum
subject surface form:
Mare Cognitum
subject surface form:
Mare Cognitum
this entity surface form:
Oceanus Procellarum region
this entity surface form:
Oceanus Procellarum basin region