Alpha Canis Majoris
E715697
Alpha Canis Majoris is the brightest star in the night sky, located in the constellation Canis Major and commonly known as Sirius.
All labels observed (3)
| Label | Occurrences |
|---|---|
| 9 Canis Majoris | 1 |
| Alpha Canis Majoris canonical | 1 |
| α Canis Majoris | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8141103 — 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 Canis Majoris Context triple: [Sirius, alsoKnownAs, Alpha Canis Majoris]
-
A.
Beta Canis Majoris
Beta Canis Majoris is a bright blue-white giant star in the constellation Canis Major, notable as one of its most luminous and prominent members.
-
B.
Gamma Canis Majoris
Gamma Canis Majoris, also known as Muliphein, is a relatively faint blue-white star in the constellation Canis Major that forms part of the celestial "Great Dog" near the bright star Sirius.
-
C.
Delta Canis Majoris
Delta Canis Majoris, also known as Wezen, is a bright F-type supergiant star in the constellation Canis Major that forms part of the prominent winter sky near Sirius.
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D.
Zeta Canis Majoris
Zeta Canis Majoris, also known as Furud, is a bright B-type main-sequence star in the constellation Canis Major.
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E.
Eta Canis Majoris
Eta Canis Majoris, also known as Aludra, is a luminous blue supergiant star in the constellation Canis Major and one of its brightest members.
- 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 Canis Majoris Target entity description: Alpha Canis Majoris is the brightest star in the night sky, located in the constellation Canis Major and commonly known as Sirius.
-
A.
Beta Canis Majoris
Beta Canis Majoris is a bright blue-white giant star in the constellation Canis Major, notable as one of its most luminous and prominent members.
-
B.
Gamma Canis Majoris
Gamma Canis Majoris, also known as Muliphein, is a relatively faint blue-white star in the constellation Canis Major that forms part of the celestial "Great Dog" near the bright star Sirius.
-
C.
Delta Canis Majoris
Delta Canis Majoris, also known as Wezen, is a bright F-type supergiant star in the constellation Canis Major that forms part of the prominent winter sky near Sirius.
-
D.
Zeta Canis Majoris
Zeta Canis Majoris, also known as Furud, is a bright B-type main-sequence star in the constellation Canis Major.
-
E.
Eta Canis Majoris
Eta Canis Majoris, also known as Aludra, is a luminous blue supergiant star in the constellation Canis Major and one of its brightest members.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf | star ⓘ |
| age_billionYears | about 0.24 ⓘ |
| alsoKnownAs |
Alpha CMa
NERFINISHED
ⓘ
Dog Star NERFINISHED ⓘ Sirius NERFINISHED ⓘ Sirius A and Sirius B NERFINISHED ⓘ α Canis Majoris NERFINISHED ⓘ |
| apparentMagnitude | −1.46 ⓘ |
| belongsTo | Local Bubble NERFINISHED ⓘ |
| binaryEccentricity | about 0.59 ⓘ |
| binaryOrbitalPeriod_years | about 50.1 ⓘ |
| binarySemiMajorAxis_AU | about 20 ⓘ |
| colorIndex_BV | about 0.00 ⓘ |
| culturalAssociation |
Canicula in Latin tradition
ⓘ
Dog Star in Greco-Roman tradition ⓘ Tishtrya in ancient Persian astronomy ⓘ dog of Orion ⓘ |
| declination_J2000 | −16° 42′ 58″ ⓘ |
| distanceFromEarth_ly | about 8.6 ⓘ |
| distanceFromEarth_pc | about 2.64 ⓘ |
| effectiveTemperature_K | about 9940 ⓘ |
| galacticPopulation | thin disk ⓘ |
| hasBayerDesignation | α Canis Majoris NERFINISHED ⓘ |
| hasCompanion | Sirius B NERFINISHED ⓘ |
| hasCompanionType | white dwarf (Sirius B) NERFINISHED ⓘ |
| hasFlamsteedDesignation | 9 Canis Majoris NERFINISHED ⓘ |
| hasGlieseNumber | Gliese 244 NERFINISHED ⓘ |
| hasHDNumber | HD 48915 NERFINISHED ⓘ |
| hasHIPNumber | HIP 32349 NERFINISHED ⓘ |
| hasHRNumber | HR 2491 NERFINISHED ⓘ |
| hasTraditionalName | Sirius NERFINISHED ⓘ |
| heliacalRisingAssociatedWith | ancient Egyptian calendar ⓘ |
| is | brightest star in the night sky ⓘ |
| isPartOf | Milky Way NERFINISHED ⓘ |
| locatedInConstellation | Canis Major NERFINISHED ⓘ |
| luminosity_solar | about 25 ⓘ |
| mass_solar | about 2.0 ⓘ |
| memberOf | Sirius supercluster (proposed) NERFINISHED ⓘ |
| metallicity_FeH | about +0.5 ⓘ |
| parallax_mas | about 379.21 ⓘ |
| properMotion_Dec_masPerYear | −1223.08 ⓘ |
| properMotion_RA_masPerYear | −546.01 ⓘ |
| radialVelocity_kmPerSec | about −5.5 ⓘ |
| radius_solar | about 1.7 ⓘ |
| rightAscension_J2000 | 06h 45m 08.9s ⓘ |
| SiriusB_effectiveTemperature_K | about 25200 ⓘ |
| SiriusB_mass_solar | about 1.0 ⓘ |
| SiriusB_spectralType | DA2 ⓘ |
| spectralType | A1V ⓘ |
| visibleFrom | both Northern and Southern Hemispheres ⓘ |
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 Canis Majoris Description of subject: Alpha Canis Majoris is the brightest star in the night sky, located in the constellation Canis Major and commonly known as Sirius.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
α Canis Majoris
this entity surface form:
9 Canis Majoris