Rigel
E132843
Rigel is a luminous blue supergiant star and one of the brightest stars in the night sky, prominently marking the foot of the constellation Orion.
All labels observed (4)
How this entity was disambiguated
This entity first appeared as the object of triple T1092370 — 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: Rigel Context triple: [Orion, hasBrightStar, Rigel]
-
A.
Betelgeuse
Betelgeuse is a massive red supergiant star in the constellation Orion, notable for its brightness and status as a likely future supernova.
-
B.
Alnitak
Alnitak is a bright multiple star system in the constellation Orion, forming the easternmost star of the prominent asterism known as Orion’s Belt.
-
C.
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.
-
D.
Betelgeuse Five
Betelgeuse Five is the fictional home planet of Zaphod Beeblebrox in Douglas Adams' "The Hitchhiker's Guide to the Galaxy" series.
-
E.
Alnilam
Alnilam is a bright blue supergiant star that forms the central and most luminous point of Orion’s Belt in the constellation Orion.
- 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: Rigel Target entity description: Rigel is a luminous blue supergiant star and one of the brightest stars in the night sky, prominently marking the foot of the constellation Orion.
-
A.
Betelgeuse
Betelgeuse is a massive red supergiant star in the constellation Orion, notable for its brightness and status as a likely future supernova.
-
B.
Alnitak
Alnitak is a bright multiple star system in the constellation Orion, forming the easternmost star of the prominent asterism known as Orion’s Belt.
-
C.
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.
-
D.
Betelgeuse Five
Betelgeuse Five is the fictional home planet of Zaphod Beeblebrox in Douglas Adams' "The Hitchhiker's Guide to the Galaxy" series.
-
E.
Alnilam
Alnilam is a bright blue supergiant star that forms the central and most luminous point of Orion’s Belt in the constellation Orion.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
blue supergiant star ⓘ fixed star ⓘ luminous star ⓘ star ⓘ |
| age | on the order of several million years ⓘ |
| alsoKnownAs |
Beta Orionis
ⓘ
Beta Orionis ⓘ
surface form:
β Orionis
|
| apparentMagnitude | about 0.13 ⓘ |
| bayerDesignation |
Beta Orionis
ⓘ
surface form:
β Orionis
|
| color | blue-white ⓘ |
| constellation | Orion ⓘ |
| culturalSignificance | important navigation star ⓘ |
| declination | about −08° 12′ ⓘ |
| distanceFromEarth |
about 260 parsecs
ⓘ
about 860 light-years ⓘ |
| effectiveTemperature | around 11,000–12,000 K ⓘ |
| evolutionaryStage | post-main-sequence massive star ⓘ |
| futureEvolution | expected to end life as a supernova ⓘ |
| galacticComponent | Orion–Cygnus Arm ⓘ |
| galacticLocation | Milky Way ⓘ |
| hasCompanion |
Rigel
self-linksurface differs
ⓘ
surface form:
Rigel B
Rigel self-linksurface differs ⓘ
surface form:
Rigel C
|
| hasProperName | Rigel self-link ⓘ |
| hasStellarSystem | multiple star system ⓘ |
| hemisphereVisibility | both northern and southern hemispheres ⓘ |
| is | slightly variable in brightness ⓘ |
| isAmong | brightest stars in the night sky ⓘ |
| isPartOf |
Orion constellation
ⓘ
surface form:
Orion constellation asterism
|
| luminosity | tens of thousands of times the Sun’s luminosity ⓘ |
| luminosityClass | Ia ⓘ |
| marks | foot of the constellation Orion ⓘ |
| mass | around 20 times the mass of the Sun ⓘ |
| nameEtymology | derived from Arabic "Rijl Jauzah al Yusrā" meaning "the left leg of the giant" ⓘ |
| parallaxMeasurement | a few milliarcseconds ⓘ |
| positionInOrion | marks Orion’s left foot as seen from Earth ⓘ |
| primaryComponent |
Rigel
self-linksurface differs
ⓘ
surface form:
Rigel A
|
| radius | around 70 times the radius of the Sun ⓘ |
| rightAscension | about 05h 14m ⓘ |
| spectralClass | B8Ia ⓘ |
| variableType | Alpha Cygni variable ⓘ |
| visibleInSeason |
northern winter
ⓘ
southern summer ⓘ |
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: Rigel Description of subject: Rigel is a luminous blue supergiant star and one of the brightest stars in the night sky, prominently marking the foot of the constellation Orion.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Rigel A
this entity surface form:
Rigel B
this entity surface form:
Rigel C