Eris
E18769
Kuiper belt object
Solar System object
celestial body
dwarf planet
minor planet
scattered disc object
trans-Neptunian object
Eris is a distant, icy dwarf planet in the outer reaches of the Solar System, notable for its size comparable to Pluto and its role in prompting the redefinition of planetary status.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Eris canonical | 11 |
| (136199) Eris | 1 |
| 2003 UB313 | 1 |
| Eris system | 1 |
| S/2005 (2003 UB313) 1 | 1 |
| helped identify Eris as a dwarf planet candidate | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T156263 — 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: Eris Context triple: [Solar System, hasDwarfPlanet, Eris]
-
A.
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.
-
B.
Alcyone
Alcyone is one of the Pleiades in Greek mythology, a daughter of the Titan Atlas and often associated with the star cluster of the same name.
-
C.
Epimetheus
Epimetheus is a figure in Greek mythology, a Titan known as the foolish brother of Prometheus and husband of Pandora, whose actions helped bring misfortune to humanity.
-
D.
Gaia
Gaia is the primordial Greek earth goddess, revered as the ancestral mother of all life and the personification of the Earth itself.
-
E.
Vulcan
Vulcan is the Roman god of fire, metalworking, and the forge, often depicted as a blacksmith crafting weapons and armor for the gods.
- 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: Eris Target entity description: Eris is a distant, icy dwarf planet in the outer reaches of the Solar System, notable for its size comparable to Pluto and its role in prompting the redefinition of planetary status.
-
A.
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.
-
B.
Alcyone
Alcyone is one of the Pleiades in Greek mythology, a daughter of the Titan Atlas and often associated with the star cluster of the same name.
-
C.
Epimetheus
Epimetheus is a figure in Greek mythology, a Titan known as the foolish brother of Prometheus and husband of Pandora, whose actions helped bring misfortune to humanity.
-
D.
Gaia
Gaia is the primordial Greek earth goddess, revered as the ancestral mother of all life and the personification of the Earth itself.
-
E.
Vulcan
Vulcan is the Roman god of fire, metalworking, and the forge, often depicted as a blacksmith crafting weapons and armor for the gods.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Kuiper belt object
ⓘ
Solar System object ⓘ celestial body ⓘ dwarf planet ⓘ minor planet ⓘ scattered disc object ⓘ trans-Neptunian object ⓘ |
| absoluteMagnitude | about -1.2 ⓘ |
| albedo | about 0.96 ⓘ |
| aphelionDistance | about 97.5 AU ⓘ |
| belongsTo | Solar System ⓘ |
| classificationChanged | 2006 IAU dwarf planet definition ⓘ |
| color | neutral to slightly gray ⓘ |
| diameter | about 2326 km ⓘ |
| discoveredBy |
Chad Trujillo
ⓘ
David L. Rabinowitz ⓘ Michael E. Brown ⓘ |
| discoveryDate | 2005-01-05 ⓘ |
| discoveryMethod | CCD imaging survey ⓘ |
| discoverySite | Palomar Observatory ⓘ |
| distanceFromSun | greater than Pluto on average ⓘ |
| equilibriumTemperature | about 30 K ⓘ |
| escapeVelocity | about 1.38 km/s ⓘ |
| hasAtmosphere | possible transient atmosphere near perihelion ⓘ |
| hasSatellite | Dysnomia ⓘ |
| IAUDesignation |
Eris
self-linksurface differs
ⓘ
surface form:
(136199) Eris
|
| influenced | redefinition of planet by IAU in 2006 ⓘ |
| isRound | true ⓘ |
| mass | about 1.66e22 kg ⓘ |
| meanRadius | about 1163 km ⓘ |
| minorPlanetNumber | 136199 ⓘ |
| namedAfter | Eris (Greek goddess of strife and discord) ⓘ |
| orbitalEccentricity | about 0.44 ⓘ |
| orbitalInclination | about 44 degrees ⓘ |
| orbitalPeriod | about 557 Earth years ⓘ |
| orbitalRegion |
Kuiper Belt objects
ⓘ
surface form:
outer Solar System
scattered disc ⓘ |
| orbits | Sun ⓘ |
| perihelionDistance | about 38 AU ⓘ |
| provisionalDesignation |
Eris
self-linksurface differs
ⓘ
surface form:
2003 UB313
|
| rotationPeriod | about 25.9 hours ⓘ |
| satelliteCount | 1 ⓘ |
| semiMajorAxis | about 67.7 AU ⓘ |
| similarInSizeTo | Pluto ⓘ |
| spectralType | TNO (dwarf planet) ⓘ |
| surfaceComposition |
methane ice
ⓘ
nitrogen ice ⓘ water ice ⓘ |
| surfaceGravity | about 0.82 m/s² ⓘ |
| surfaceTemperature | about 30 K to 50 K ⓘ |
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: Eris Description of subject: Eris is a distant, icy dwarf planet in the outer reaches of the Solar System, notable for its size comparable to Pluto and its role in prompting the redefinition of planetary status.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Kuiper Belt object
this entity surface form:
2003 UB313
this entity surface form:
(136199) Eris
this entity surface form:
S/2005 (2003 UB313) 1
this entity surface form:
helped identify Eris as a dwarf planet candidate