Halley’s Comet
E701919
Halley-type comet
non-periodic comet in historical records (before periodicity recognized)
periodic comet
short-period comet
Halley’s Comet is a famous short-period comet visible from Earth roughly every 76 years, historically recorded for millennia and notable for its bright, easily observed appearances.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Halley’s Comet canonical | 10 |
| 1P/Halley | 5 |
| Comet Halley | 2 |
| Halley's Comet | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7834929 — 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: Halley’s Comet Context triple: [Spartan-Halley free-flyer, target, Halley’s Comet]
-
A.
Halley
Halley is the surname of the English astronomer and mathematician Edmund Halley, best known for computing the orbit of the periodic comet that now bears his name.
-
B.
Comet
Comet is one of Santa Claus’s traditional flying reindeer, often depicted as swift and spirited as he helps pull Santa’s sleigh on Christmas Eve.
-
C.
Comet
Comet is a U.S. digital broadcast television network specializing in science fiction, fantasy, and horror programming.
-
D.
Comet
Comet is a popular science book by Carl Sagan and Ann Druyan that explores the nature, history, and cultural impact of comets in the solar system.
-
E.
Komet
Komet was the nickname of the Messerschmitt Me 163, a German World War II rocket-powered interceptor aircraft known for its extraordinary speed and unconventional design.
- 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: Halley’s Comet Target entity description: Halley’s Comet is a famous short-period comet visible from Earth roughly every 76 years, historically recorded for millennia and notable for its bright, easily observed appearances.
-
A.
Halley
Halley is the surname of the English astronomer and mathematician Edmund Halley, best known for computing the orbit of the periodic comet that now bears his name.
-
B.
Comet
Comet is one of Santa Claus’s traditional flying reindeer, often depicted as swift and spirited as he helps pull Santa’s sleigh on Christmas Eve.
-
C.
Comet
Comet is a U.S. digital broadcast television network specializing in science fiction, fantasy, and horror programming.
-
D.
Comet
Comet is a popular science book by Carl Sagan and Ann Druyan that explores the nature, history, and cultural impact of comets in the solar system.
-
E.
Komet
Komet was the nickname of the Messerschmitt Me 163, a German World War II rocket-powered interceptor aircraft known for its extraordinary speed and unconventional design.
- F. None of above. chosen
Statements (64)
| Predicate | Object |
|---|---|
| instanceOf |
Halley-type comet
ⓘ
non-periodic comet in historical records (before periodicity recognized) ⓘ periodic comet ⓘ short-period comet ⓘ |
| discoverer |
Edmond Halley (periodicity)
ⓘ
linked to:
Edmund Halley
|
| hasAphelionDistance | about 35 astronomical units ⓘ |
| hasBrightnessAtPerihelion | can reach apparent magnitude around +2 or brighter in favorable returns ⓘ |
| hasComposition |
carbon dioxide
ⓘ
carbon monoxide ⓘ dust ⓘ water ice ⓘ |
| hasCulturalSignificance |
considered an omen in many pre-modern cultures
ⓘ
inspired artworks, literature, and scientific interest over millennia ⓘ |
| hasDensity | about 0.6 g/cm³ (low-density, porous) ⓘ |
| hasDesignation |
1P/Halley
ⓘ
linked to:
Halley’s Comet
|
| hasDustProduction | significant dust jets observed near perihelion ⓘ |
| hasDynamicalClass | Halley-type comet (orbital period 20–200 years, high inclination) ⓘ |
| hasEarliestReliableRecord | 240 BCE (Chinese chronicles) ⓘ |
| hasEscapeVelocity | on the order of 0.002 km/s (very low) ⓘ |
| hasHistoricalObservation |
1066 appearance depicted on Bayeux Tapestry
ⓘ
1456 appearance associated with Ottoman siege of Belgrade in European chronicles ⓘ 1910 appearance widely photographed and spectroscopically studied ⓘ 1986 appearance observed by multiple spacecraft ⓘ |
| hasInclination | about 162 degrees to the ecliptic ⓘ |
| hasLastPerihelionDate | 1986-02-09 ⓘ |
| hasMass | on the order of 2.2×10^14 kg (approximate) ⓘ |
| hasMeteorShowerAssociation |
Eta Aquariids
ⓘ
Orionids ⓘ |
| hasMinorPlanetCenterDesignation |
1P/Halley
ⓘ
linked to:
Halley’s Comet
|
| hasNextPerihelionDate | 2061-07-28 (approximate) ⓘ |
| hasNonGravitationalEffects | outgassing alters its orbital period slightly between returns ⓘ |
| hasNucleusAlbedo | very low (dark, ~0.04) ⓘ |
| hasNucleusDimensions | approximately 15 km × 8 km × 8 km ⓘ |
| hasNucleusMeanDiameter | about 11 km ⓘ |
| hasNucleusShape | irregular ⓘ |
| hasOrbitalDirection | retrograde ⓘ |
| hasOrbitalEccentricity | about 0.967 ⓘ |
| hasOrbitalPeriod |
about 75–76 years
ⓘ
approximately 75.3 years (current value, variable over time) ⓘ |
| hasOriginRegion | likely Oort Cloud (dynamical origin) ⓘ |
| hasPerihelionDistance | about 0.586 astronomical units ⓘ |
| hasPreviousPerihelionDate |
1066-03-20 (approximate historical date)
ⓘ
1456-06-08 (approximate historical date) ⓘ 1531-08-26 ⓘ 1607-10-26 ⓘ 1682-09-15 ⓘ 1759-03-13 ⓘ 1835-11-16 ⓘ 1910-04-20 ⓘ |
| hasSemimajorAxis | about 17.8 astronomical units ⓘ |
| hasSpaceMissionCampaign |
Halley Armada (informal name for 1986 spacecraft fleet)
ⓘ
linked to:
Spartan-Halley free-flyer
|
| hasSpectralFeatures | emission from CN, C2, and other radicals in coma ⓘ |
| hasSurfaceGravity | extremely weak microgravity ⓘ |
| hasTailType |
dust tail
ⓘ
ion tail ⓘ |
| hasVisibilityFromEarth | naked-eye object during favorable apparitions ⓘ |
| memberOf | Solar System ⓘ |
| namedAfter |
Edmond Halley
ⓘ
linked to:
Edmund Halley
|
| orbits | Sun ⓘ |
| visitedBySpacecraft |
Giotto
ⓘ
Sakigake ⓘ Suisei ⓘ Vega 1 ⓘ Vega 2 ⓘ |
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: Halley’s Comet Description of subject: Halley’s Comet is a famous short-period comet visible from Earth roughly every 76 years, historically recorded for millennia and notable for its bright, easily observed appearances.
Referenced by (18)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Halley’s Comet
linked to: Halley’s Comet
linked to: Halley’s Comet
linked to: Halley’s Comet
linked to: Halley’s Comet
linked to: Halley’s Comet
linked to: Halley’s Comet