Io
E170675
Io is a large, volcanically active moon of Jupiter and one of the four major Galilean satellites discovered by Galileo Galilei.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Io canonical | 24 |
| Jupiter and Io | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1443424 — 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: Io Context triple: [Galilean moons, member, Io]
-
A.
Io
Io is a figure from Greek mythology, a mortal woman loved by Zeus and tormented by Hera, whose wanderings and suffering are famously recounted in Aeschylus’ tragedy "Prometheus Bound."
-
B.
Iapetus
Iapetus is a distinctive moon of Saturn known for its striking two-tone coloration and unusually large equatorial ridge.
-
C.
Iapetus
Iapetus is a Titan from Greek mythology, often associated with mortality and craftsmanship and known as the father of Prometheus, Epimetheus, Atlas, and Menoetius.
-
D.
Mondas
Mondas is the fictional twin planet of Earth in the Doctor Who universe, known as the original home of the Cybermen.
-
E.
Jupiter
Jupiter is the largest planet in our Solar System, a gas giant known for its Great Red Spot and many moons.
- 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: Io Target entity description: Io is a large, volcanically active moon of Jupiter and one of the four major Galilean satellites discovered by Galileo Galilei.
-
A.
Io
Io is a figure from Greek mythology, a mortal woman loved by Zeus and tormented by Hera, whose wanderings and suffering are famously recounted in Aeschylus’ tragedy "Prometheus Bound."
-
B.
Iapetus
Iapetus is a Titan from Greek mythology, often associated with mortality and craftsmanship and known as the father of Prometheus, Epimetheus, Atlas, and Menoetius.
-
C.
Iapetus
Iapetus is a distinctive moon of Saturn known for its striking two-tone coloration and unusually large equatorial ridge.
-
D.
Mondas
Mondas is the fictional twin planet of Earth in the Doctor Who universe, known as the original home of the Cybermen.
-
E.
Jupiter
Jupiter is the largest planet in our Solar System, a gas giant known for its Great Red Spot and many moons.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
Galilean moon
ⓘ
astronomical object ⓘ moon of Jupiter ⓘ natural satellite ⓘ |
| albedo | about 0.63 geometric albedo ⓘ |
| atmosphereComposition | sulfur dioxide ⓘ |
| atmosphereType | tenuous atmosphere ⓘ |
| belongsTo | Solar System ⓘ |
| belongsToSystem |
Jovian system
ⓘ
linked to:
Jovian satellite system
|
| creates | Io plasma torus ⓘ |
| diameter | about 3643.2 km ⓘ |
| discoverer | Galileo Galilei ⓘ |
| discoveryDate | 1610 ⓘ |
| escapeVelocity | about 2.56 km/s ⓘ |
| hasBeenObservedBy |
Galileo spacecraft
ⓘ
New Horizons spacecraft ⓘ
linked to:
New Horizons
|
| hasBeenVisitedBy |
Pioneer 10
ⓘ
Pioneer 11 ⓘ Voyager 1 ⓘ Voyager 2 ⓘ |
| hasGeologicalActivity | intense volcanism ⓘ |
| hasMagnetosphericInteractionWith | Jupiter’s magnetosphere ⓘ |
| hasVolcano |
Loki Patera
ⓘ
Pele ⓘ Tvashtar Paterae ⓘ |
| isGalileanSatelliteWith |
Callisto
ⓘ
Europa ⓘ Ganymede ⓘ |
| isMost | most volcanically active body in the Solar System ⓘ |
| mass | about 8.93×10^22 kg ⓘ |
| meanDensity | about 3.53 g/cm³ ⓘ |
| meanRadius | about 1821.6 km ⓘ |
| meanSurfaceTemperature | about 110 K ⓘ |
| namedAfter |
Io (mythology)
ⓘ
linked to:
Io
|
| orbitalEccentricity | about 0.0041 ⓘ |
| orbitalInclination | about 0.04 degrees to Jupiter’s equator ⓘ |
| orbitalPeriod | about 1.769 days ⓘ |
| orbits | Jupiter ⓘ |
| rotationalState | tidally locked to Jupiter ⓘ |
| rotationPeriod | about 1.769 days ⓘ |
| semiMajorAxis | about 421700 km ⓘ |
| surfaceComposition |
silicate rock
ⓘ
sulfur ⓘ sulfur dioxide frost ⓘ |
| surfaceFeature |
calderas
ⓘ
extensive lava flows ⓘ mountainous terrain ⓘ sulfur plains ⓘ |
| surfaceGravity | about 1.796 m/s² ⓘ |
| tidalHeatingCausedBy |
gravitational interaction with Jupiter
ⓘ
orbital resonances with Europa and Ganymede ⓘ |
| volcanismDrivenBy | tidal heating ⓘ |
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: Io Description of subject: Io is a large, volcanically active moon of Jupiter and one of the four major Galilean satellites discovered by Galileo Galilei.
Referenced by (25)
Full triples — surface form annotated when it differs from this entity's canonical label.