Alpha Eridani
E554800
Alpha Eridani, traditionally known as Achernar, is a bright, rapidly rotating blue-white star marking the southern end of the constellation Eridanus.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Alpha Eridani canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5723762 — 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: Alpha Eridani Context triple: [Achernar, BayerDesignation, Alpha Eridani]
-
A.
Alpha Telescopii
Alpha Telescopii is a blue-white giant star that serves as the primary luminary of the southern constellation Telescopium.
-
B.
Alpha Capricorni
Alpha Capricorni is a bright multiple star system in the constellation Capricornus, visible to the naked eye as a single star but actually composed of two widely separated components.
-
C.
Tau Canis Majoris
Tau Canis Majoris is a very luminous, massive blue-white multiple star system located in the constellation Canis Major and is one of the brightest members of the open cluster NGC 2362.
-
D.
Delta Capricorni
Delta Capricorni is a multiple star system in the constellation Capricornus, notable as its most luminous star and commonly known by the traditional name Deneb Algedi.
-
E.
Epsilon Scuti
Epsilon Scuti is a relatively faint star located in the small southern constellation Scutum.
- 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: Alpha Eridani Target entity description: Alpha Eridani, traditionally known as Achernar, is a bright, rapidly rotating blue-white star marking the southern end of the constellation Eridanus.
-
A.
Alpha Telescopii
Alpha Telescopii is a blue-white giant star that serves as the primary luminary of the southern constellation Telescopium.
-
B.
Alpha Capricorni
Alpha Capricorni is a bright multiple star system in the constellation Capricornus, visible to the naked eye as a single star but actually composed of two widely separated components.
-
C.
Tau Canis Majoris
Tau Canis Majoris is a very luminous, massive blue-white multiple star system located in the constellation Canis Major and is one of the brightest members of the open cluster NGC 2362.
-
D.
Delta Capricorni
Delta Capricorni is a multiple star system in the constellation Capricornus, notable as its most luminous star and commonly known by the traditional name Deneb Algedi.
-
E.
Epsilon Scuti
Epsilon Scuti is a relatively faint star located in the small southern constellation Scutum.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
main-sequence star
ⓘ
star ⓘ |
| age_Myr | about 37 ⓘ |
| apparentMagnitudeV | 0.46 ⓘ |
| belongsToAsterism | Eridanus (river) pattern ⓘ |
| belongsToHemisphere | southern celestial hemisphere ⓘ |
| catalogIdentifier |
FK5 45
NERFINISHED
ⓘ
HD 10144 NERFINISHED ⓘ HIP 7588 NERFINISHED ⓘ HR 472 NERFINISHED ⓘ |
| color | blue-white ⓘ |
| declination | −57° 14′ 12″ ⓘ |
| distanceFromEarth_ly | about 139 ⓘ |
| distanceFromEarth_pc | about 42.9 ⓘ |
| effectiveTemperature_K | about 15,000 ⓘ |
| equatorialCoordinatesEpoch | J2000 ⓘ |
| equatorialToPolarRadiusRatio | about 1.5 ⓘ |
| hasBayerDesignation | α Eridani NERFINISHED ⓘ |
| hasCircumstellarDisk | yes ⓘ |
| hasCompanion | Alpha Eridani B NERFINISHED ⓘ |
| hasPhotometricBand | V-band magnitude 0.46 ⓘ |
| hasTraditionalName | Achernar NERFINISHED ⓘ |
| IAUName | Achernar NERFINISHED ⓘ |
| isAmong | brightest stars in the night sky ⓘ |
| isIAUApprovedStarName | yes ⓘ |
| locatedInConstellation | Eridanus NERFINISHED ⓘ |
| luminosity_solar | about 3,150 ⓘ |
| marksFeature | southern end of the constellation Eridanus ⓘ |
| mass_solar | about 6.7 ⓘ |
| metallicity_FeH | approximately solar ⓘ |
| nameOrigin | derived from Arabic "Ākhir an-nahr" meaning "End of the River" ⓘ |
| orbitalPeriodOfCompanion_years | about 14–15 ⓘ |
| parallax_mas | 23.39 ⓘ |
| properMotionDec_masPerYr | −40.08 ⓘ |
| properMotionRA_masPerYr | +88.02 ⓘ |
| radialVelocity_kmPerSec | +16.7 ⓘ |
| radius_solar | about 7.3 (equatorial) ⓘ |
| rightAscension | 01h 37m 42.8s ⓘ |
| rotationalVelocity_kmPerSec | about 250 ⓘ |
| rotationCharacteristic | rapidly rotating ⓘ |
| shape | highly oblate ⓘ |
| spectralType |
A-type main-sequence star
ⓘ
B6 Vep ⓘ |
| systemType | binary ⓘ |
| variabilityType | Be star characteristics ⓘ |
| visibility | not visible from most of the Northern Hemisphere ⓘ |
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: Alpha Eridani Description of subject: Alpha Eridani, traditionally known as Achernar, is a bright, rapidly rotating blue-white star marking the southern end of the constellation Eridanus.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Achernar