Acamar
E540383
Acamar is a bright binary star system in the constellation Eridanus, historically known as the river’s end in ancient star lore.
All labels observed (3)
How this entity was disambiguated
This entity first appeared as the object of triple T5723769 — 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: Acamar Context triple: [Theta Eridani, traditionalName, Acamar]
-
A.
Yarrowitch
Yarrowitch is a small rural locality in New South Wales, Australia, known for its agricultural landscape and proximity to national parks and natural attractions.
-
B.
The Turim
The Turim is a foundational 14th-century Jewish legal code by Rabbi Jacob ben Asher that systematically organizes halakhic rulings into four major sections.
-
C.
Echenique
Echenique is a Spanish-language surname of Basque origin borne by various notable figures in politics, arts, and public life across the Spanish-speaking world.
-
D.
Averostra
Averostra is a major clade of theropod dinosaurs that includes many of the more derived, often carnivorous lineages such as ceratosaurs and tetanurans.
-
E.
Aptoryama
Aptoryama is a specific Vedic soma sacrifice ritual recognized as a variant form of the Somayajna.
- 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: Acamar Target entity description: Acamar is a bright binary star system in the constellation Eridanus, historically known as the river’s end in ancient star lore.
-
A.
Yarrowitch
Yarrowitch is a small rural locality in New South Wales, Australia, known for its agricultural landscape and proximity to national parks and natural attractions.
-
B.
The Turim
The Turim is a foundational 14th-century Jewish legal code by Rabbi Jacob ben Asher that systematically organizes halakhic rulings into four major sections.
-
C.
Echenique
Echenique is a Spanish-language surname of Basque origin borne by various notable figures in politics, arts, and public life across the Spanish-speaking world.
-
D.
Averostra
Averostra is a major clade of theropod dinosaurs that includes many of the more derived, often carnivorous lineages such as ceratosaurs and tetanurans.
-
E.
Aptoryama
Aptoryama is a specific Vedic soma sacrifice ritual recognized as a variant form of the Somayajna.
- F. None of above. chosen
Statements (39)
| Predicate | Object |
|---|---|
| instanceOf | binary star system ⓘ |
| angularSeparationBetweenComponents | about 8 arcseconds ⓘ |
| apparentMagnitudeV | 2.88 ⓘ |
| declination | −40° 40′ 12″ (approximate, J2000) ⓘ |
| distanceFromEarth |
about 161 light-years
ⓘ
about 49 parsecs ⓘ |
| hasBayerDesignation |
Theta Eridani
ⓘ
θ Eridani ⓘ
linked to:
Theta Eridani
|
| hasColorIndexBminusV | about +0.16 ⓘ |
| hasComponent |
Acamar A
ⓘ
linked to:
Acamar
Acamar B ⓘ
linked to:
Acamar
|
| hasComponentSpectralType |
Acamar A: A4 IV
ⓘ
Acamar B: early-type A star (approximate) ⓘ |
| hasCulturalSignificance |
considered the end of the river Eridanus in ancient star lore
ⓘ
name historically associated with the river’s end ⓘ |
| hasEquatorialCoordinateSystem | J2000 ⓘ |
| hasFlamsteedDesignation | 19 Eridani ⓘ |
| hasHDDesignation | HD 18622 ⓘ |
| hasHIPDesignation | HIP 13847 ⓘ |
| hasHRDesignation | HR 897 ⓘ |
| hasOtherDesignation |
CD−40 773
ⓘ
SAO 21521 ⓘ WDS J02752-4016 ⓘ |
| hasParallaxMeasurement | measured by Hipparcos and Gaia missions ⓘ |
| hasProperMotion | exhibits measurable proper motion ⓘ |
| hasTraditionalName | Acamar ⓘ |
| hasVariableStatus | not known as a significant variable star ⓘ |
| isBrightStar | true ⓘ |
| isCataloguedIn |
Bright Star Catalogue
ⓘ
Henry Draper Catalogue ⓘ Hipparcos Catalogue ⓘ |
| isPartOf | Milky Way ⓘ |
| isUsedFor | stellar astrophysics studies of A-type subgiants ⓘ |
| isVisibleToNakedEye | true ⓘ |
| locatedInConstellation | Eridanus ⓘ |
| luminosityClass | subgiant ⓘ |
| nameEtymology | derived from Arabic phrase meaning “the end of the river” ⓘ |
| rightAscension | 02h 47m 54s (approximate, J2000) ⓘ |
| spectralType | A4 IV ⓘ |
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: Acamar Description of subject: Acamar is a bright binary star system in the constellation Eridanus, historically known as the river’s end in ancient star lore.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.