HD 22049
E679757
HD 22049, better known as Epsilon Eridani, is a nearby young K-type main-sequence star notable for its prominent debris disk and at least one confirmed exoplanet.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HD 22049 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T7658268 — 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: HD 22049 Context triple: [Epsilon Eridani b, hostStarHDDesignation, HD 22049]
-
A.
HD 215497
HD 215497 is a star located in the constellation Tucana, known to host at least one exoplanet.
-
B.
HD 278942
HD 278942 is a massive, young, early-type star located in the Perseus constellation and associated with the Perseus OB2 stellar association.
-
C.
HD 24398
HD 24398, also known as ζ Persei, is a bright blue supergiant star in the constellation Perseus and a prominent member of the Perseus OB2 stellar association.
-
D.
HD 281159
HD 281159 is a young, massive star located in the Perseus OB2 stellar association, a nearby region of recent star formation in the constellation Perseus.
-
E.
HD 106490
HD 106490 is a bright blue-white giant star in the constellation Crux, commonly known as Delta Crucis and forming part of the Southern Cross asterism.
- 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: HD 22049 Target entity description: HD 22049, better known as Epsilon Eridani, is a nearby young K-type main-sequence star notable for its prominent debris disk and at least one confirmed exoplanet.
-
A.
HD 215497
HD 215497 is a star located in the constellation Tucana, known to host at least one exoplanet.
-
B.
HD 278942
HD 278942 is a massive, young, early-type star located in the Perseus constellation and associated with the Perseus OB2 stellar association.
-
C.
HD 24398
HD 24398, also known as ζ Persei, is a bright blue supergiant star in the constellation Perseus and a prominent member of the Perseus OB2 stellar association.
-
D.
HD 281159
HD 281159 is a young, massive star located in the Perseus OB2 stellar association, a nearby region of recent star formation in the constellation Perseus.
-
E.
HD 106490
HD 106490 is a bright blue-white giant star in the constellation Crux, commonly known as Delta Crucis and forming part of the Southern Cross asterism.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
K-type star
ⓘ
debris-disk star ⓘ main-sequence star ⓘ star with exoplanets ⓘ |
| age_Gyr |
about 0.4
ⓘ
less than 1 ⓘ |
| alsoKnownAs |
BD−09 697
NERFINISHED
ⓘ
Epsilon Eridani NERFINISHED ⓘ GJ 144 NERFINISHED ⓘ Gliese 144 NERFINISHED ⓘ HR 1084 NERFINISHED ⓘ ε Eridani NERFINISHED ⓘ |
| apparentMagnitudeV | 3.73 ⓘ |
| catalog |
Bright Star Catalogue
NERFINISHED
ⓘ
Gliese Catalogue of Nearby Stars NERFINISHED ⓘ Henry Draper Catalogue NERFINISHED ⓘ |
| colorIndexB−V | 0.88 ⓘ |
| constellation | Eridanus NERFINISHED ⓘ |
| debrisDiskStructure |
inner warm belt
ⓘ
outer cold belt ⓘ |
| distanceFromEarth_ly | about 10.5 ⓘ |
| distanceFromEarth_pc | about 3.2 ⓘ |
| effectiveTemperature_K | about 5100 ⓘ |
| galacticPopulation | thin disk ⓘ |
| hasChromosphericActivity | true ⓘ |
| hasDebrisDisk | true ⓘ |
| hasExoplanet | Epsilon Eridani b NERFINISHED ⓘ |
| hasStrongMagneticActivity | true ⓘ |
| IAUName | Epsilon Eridani NERFINISHED ⓘ |
| infraredExcess | detected ⓘ |
| luminosity_solarLuminosity | about 0.34 ⓘ |
| mass_solarMass | about 0.82 ⓘ |
| metallicity_[Fe/H] | about −0.1 ⓘ |
| nearestBrightStarsRank | among nearest Sun-like stars ⓘ |
| parallax_mas | about 310 ⓘ |
| planetarySystem | Epsilon Eridani system NERFINISHED ⓘ |
| properMotion_Dec_masPerYr | about 20 ⓘ |
| properMotion_RA_masPerYr | about −975 ⓘ |
| radialVelocity_kmPerS | about 16.4 ⓘ |
| radius_solarRadius | about 0.74 ⓘ |
| rotationPeriod_days | about 11.2 ⓘ |
| solarNeighborhoodMember | true ⓘ |
| spectralType | K2V ⓘ |
| variableType | BY Draconis-type activity (rotational modulation) ⓘ |
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: HD 22049 Description of subject: HD 22049, better known as Epsilon Eridani, is a nearby young K-type main-sequence star notable for its prominent debris disk and at least one confirmed exoplanet.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.