Arcturus
E433363
Arcturus is a bright, orange giant star in the constellation Boötes and one of the brightest stars visible from Earth, historically important in many cultures for navigation.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Arcturus canonical | 10 |
| Alpha Boötis | 1 |
| bright orange giant star Arcturus | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4351537 — 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: Arcturus Context triple: [Hōkūleʻa, namedAfter, Arcturus]
-
A.
Aldebaran
Aldebaran is a bright orange giant star in the constellation Taurus, known as one of the most prominent stars in the night sky.
-
B.
Vega
Vega is a European small-lift launch vehicle developed by the European Space Agency and partners, primarily used to place light payloads into low Earth orbit.
-
C.
Vega
Vega is a common Spanish surname borne by numerous notable individuals across fields such as entertainment, sports, and politics.
-
D.
Sirius
Sirius is the brightest star in the night sky, a nearby binary star system in the constellation Canis Major that has featured prominently in astronomy, mythology, and literature.
-
E.
Canopus
Canopus was an ancient Egyptian coastal city near modern-day Alexandria, known as a major religious center and sanctuary dedicated to the goddess Isis.
- 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: Arcturus Target entity description: Arcturus is a bright, orange giant star in the constellation Boötes and one of the brightest stars visible from Earth, historically important in many cultures for navigation.
-
A.
Aldebaran
Aldebaran is a bright orange giant star in the constellation Taurus, known as one of the most prominent stars in the night sky.
-
B.
Vega
Vega is a European small-lift launch vehicle developed by the European Space Agency and partners, primarily used to place light payloads into low Earth orbit.
-
C.
Vega
Vega is a common Spanish surname borne by numerous notable individuals across fields such as entertainment, sports, and politics.
-
D.
Sirius
Sirius is the brightest star in the night sky, a nearby binary star system in the constellation Canis Major that has featured prominently in astronomy, mythology, and literature.
-
E.
Canopus
Canopus was an ancient Egyptian coastal city near modern-day Alexandria, known as a major religious center and sanctuary dedicated to the goddess Isis.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
K-type giant star
ⓘ
bright giant star ⓘ red giant star ⓘ star ⓘ |
| absoluteMagnitudeV | −0.30 ⓘ |
| age_Gyr | about 7.1 ⓘ |
| apparentMagnitude | −0.05 ⓘ |
| associatedAsterism |
Great Diamond
ⓘ
Spring Triangle ⓘ |
| bayerDesignation |
Alpha Boötis
ⓘ
linked to:
Arcturus
|
| belongsTo | Arcturus moving group ⓘ |
| colorIndexB−V | 1.23 ⓘ |
| constellation |
Boötes
ⓘ
linked to:
Bootes
|
| culturalSignificance | historically important in many cultures for navigation ⓘ |
| declination | +19°10′57″ ⓘ |
| distanceFromEarth_ly | about 36.7 light-years ⓘ |
| distanceFromEarth_pc | about 11.3 parsecs ⓘ |
| effectiveTemperature_K | about 4280 ⓘ |
| evolutionaryStage | red giant branch ⓘ |
| flamsteedDesignation | 16 Boötis ⓘ |
| galacticPopulation | thick disk star ⓘ |
| hdDesignation | HD 124897 ⓘ |
| heliacalRisingUsedFor | agricultural calendars in some ancient cultures ⓘ |
| hemisphereVisibility |
northern hemisphere
ⓘ
southern hemisphere ⓘ |
| hipparcosDesignation | HIP 69673 ⓘ |
| hrDesignation | HR 5340 ⓘ |
| locatedIn | Milky Way ⓘ |
| luminosity_solar | about 170 ⓘ |
| mass_solar | about 1.1 ⓘ |
| metallicity_Fe_H | about −0.5 ⓘ |
| nameEtymology | from Ancient Greek meaning "guardian of the bear" ⓘ |
| notableProperty |
brightest star in the constellation Boötes
ⓘ
brightest star in the northern celestial hemisphere ⓘ fourth-brightest star in the night sky ⓘ |
| observedBy |
Babylonian astronomers
ⓘ
Chinese astronomers ⓘ ancient Greek astronomers ⓘ |
| parallax_mas | about 88.8 milliarcseconds ⓘ |
| properMotionDec_mas_yr | about −1999 ⓘ |
| properMotionRA_mas_yr | about −1093 ⓘ |
| radialVelocity_km_s | about −5.2 ⓘ |
| radius_solar | about 25 ⓘ |
| rightAscension | 14h15m39.7s ⓘ |
| spectralType | K1.5III ⓘ |
| traditionalName | Arcturus ⓘ |
| usedFor | celestial navigation ⓘ |
| variableStarType | irregular variable ⓘ |
| visibleToNakedEye | true ⓘ |
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: Arcturus Description of subject: Arcturus is a bright, orange giant star in the constellation Boötes and one of the brightest stars visible from Earth, historically important in many cultures for navigation.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.