Mercury
E18768
Mercury is the smallest and innermost planet in our Solar System, known for its extreme temperature variations and heavily cratered surface.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Mercury canonical | 52 |
| Mercury (planet) | 2 |
| Mercury orbit | 1 |
| mercury | 1 |
| mercury (Hg) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T156238 — 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: Mercury Context triple: [Solar System, hasComponent, Mercury]
-
A.
Mercury
Mercury was an American automobile marque of the Ford Motor Company known for producing mid-priced cars positioned between Ford and Lincoln.
-
B.
Merkur
Merkur was a short-lived automotive marque created by Ford in the 1980s to sell European-designed performance and luxury cars in the North American market.
-
C.
Vulcan
Vulcan is the Roman god of fire, metalworking, and the forge, often depicted as a blacksmith crafting weapons and armor for the gods.
-
D.
Venera
Venera is a grade or class within the Mexican Order of the Aztec Eagle, the country’s highest distinction awarded to foreigners.
-
E.
Saturn
Saturn was an American automobile manufacturer created by General Motors as a separate, innovative small-car brand aimed at competing with Japanese imports.
- 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: Mercury Target entity description: Mercury is the smallest and innermost planet in our Solar System, known for its extreme temperature variations and heavily cratered surface.
-
A.
Mercury
Mercury was an American automobile marque of the Ford Motor Company known for producing mid-priced cars positioned between Ford and Lincoln.
-
B.
Merkur
Merkur was a short-lived automotive marque created by Ford in the 1980s to sell European-designed performance and luxury cars in the North American market.
-
C.
Vulcan
Vulcan is the Roman god of fire, metalworking, and the forge, often depicted as a blacksmith crafting weapons and armor for the gods.
-
D.
Venera
Venera is a grade or class within the Mexican Order of the Aztec Eagle, the country’s highest distinction awarded to foreigners.
-
E.
Saturn
Saturn was an American automobile manufacturer created by General Motors as a separate, innovative small-car brand aimed at competing with Japanese imports.
- F. None of above. chosen
Statements (65)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
inner planet ⓘ planet ⓘ terrestrial planet ⓘ |
| albedoBond | about 0.12 ⓘ |
| atmosphereType | exosphere ⓘ |
| atmosphericComponent |
helium
ⓘ
hydrogen ⓘ oxygen ⓘ potassium ⓘ sodium ⓘ |
| axialTilt | about 0.03 degrees ⓘ |
| belongsToCategory |
innermost planet in the Solar System
ⓘ
smallest planet in the Solar System ⓘ |
| canTransitSunFromEarth | yes ⓘ |
| colorAppearance | dark gray ⓘ |
| coreComposition | large metallic core ⓘ |
| coreState | partly molten core ⓘ |
| crustComposition | silicate rock ⓘ |
| density_mean | about 5.43 grams per cubic centimeter ⓘ |
| diameter_mean | about 4,880 kilometers ⓘ |
| discoveredBy | prehistoric astronomers ⓘ |
| distanceFromSun_mean |
about 0.39 astronomical units
ⓘ
about 57.9 million kilometers ⓘ |
| escapeVelocity | about 4.25 kilometers per second ⓘ |
| exploredBy |
BepiColombo mission
ⓘ
surface form:
BepiColombo
MESSENGER ⓘ Mariner 10 ⓘ |
| firstFlybyBy | Mariner 10 ⓘ |
| firstFlybyYear | 1974 ⓘ |
| firstOrbiter | MESSENGER ⓘ |
| firstOrbiterArrivalYear | 2011 ⓘ |
| hasAtmosphere | yes ⓘ |
| hasMagneticField | yes ⓘ |
| hasNaturalSatellite | no known moons ⓘ |
| hasWaterIce | yes ⓘ |
| magneticFieldStrength_surface | about 1% of Earth’s ⓘ |
| magneticFieldType | global dipolar magnetic field ⓘ |
| mass | about 3.30 × 10^23 kilograms ⓘ |
| maxSurfaceTemperature | about 430 degrees Celsius ⓘ |
| meanSurfaceTemperature | about 167 degrees Celsius ⓘ |
| memberOf | inner Solar System ⓘ |
| minSurfaceTemperature | about −180 degrees Celsius ⓘ |
| namedAfter |
Hermes
ⓘ
surface form:
Mercury (Roman god)
|
| observedFrom | Earth ⓘ |
| orbitalEccentricity | about 0.2056 ⓘ |
| orbitalInclinationToEcliptic | about 7 degrees ⓘ |
| orbitalPeriod | about 88 Earth days ⓘ |
| partOf | Solar System ⓘ |
| positionFromSun | first planet from the Sun ⓘ |
| radius_mean | about 2,440 kilometers ⓘ |
| rotationOrbitResonance | 3:2 spin–orbit resonance ⓘ |
| siderealRotationPeriod | about 58.6 Earth days ⓘ |
| solarDayLength | about 176 Earth days ⓘ |
| surfaceArea | about 7.5 × 10^7 square kilometers ⓘ |
| surfaceFeature |
Caloris Basin
ⓘ
Rupes (scarps) ⓘ heavily cratered highlands ⓘ intercrater plains ⓘ smooth plains ⓘ |
| surfaceGravity | about 3.7 meters per second squared ⓘ |
| transitFrequencyApprox | about 13 times per century ⓘ |
| visibleTo | naked eye ⓘ |
| volume | about 6.1 × 10^10 cubic kilometers ⓘ |
| waterIceLocation | permanently shadowed polar craters ⓘ |
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: Mercury Description of subject: Mercury is the smallest and innermost planet in our Solar System, known for its extreme temperature variations and heavily cratered surface.
Referenced by (57)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Evening Star
this entity surface form:
Mercury (planet)