Alpha Crucis
E145921
B-type main-sequence star
B-type star
astronomical object
multiple star system
star system
stellar system
Alpha Crucis is the brightest star in the Southern Cross constellation and one of the key stars depicted on the Australian national flag.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Acrux | 10 |
| Alpha Crucis canonical | 4 |
| α Crucis | 2 |
| Alpha Crucis A | 1 |
| Alpha Crucis B | 1 |
| Alpha Crucis C | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1286813 — 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 Crucis Context triple: [Australian national flag, hasStar, Alpha Crucis]
-
A.
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.
-
B.
Alpha Cancri
Alpha Cancri is a multiple-star system in the constellation Cancer, visible to the naked eye and known for its close stellar pairing.
-
C.
Aldebaran
Aldebaran is a bright orange giant star in the constellation Taurus, known as one of the most prominent stars in the night sky.
-
D.
Betelgeuse
Betelgeuse is a massive red supergiant star in the constellation Orion, notable for its brightness and status as a likely future supernova.
-
E.
Rigel
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.
- 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 Crucis Target entity description: Alpha Crucis is the brightest star in the Southern Cross constellation and one of the key stars depicted on the Australian national flag.
-
A.
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.
-
B.
Alpha Cancri
Alpha Cancri is a multiple-star system in the constellation Cancer, visible to the naked eye and known for its close stellar pairing.
-
C.
Aldebaran
Aldebaran is a bright orange giant star in the constellation Taurus, known as one of the most prominent stars in the night sky.
-
D.
Betelgeuse
Betelgeuse is a massive red supergiant star in the constellation Orion, notable for its brightness and status as a likely future supernova.
-
E.
Rigel
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.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
B-type main-sequence star
ⓘ
B-type main-sequence star ⓘ B-type star ⓘ astronomical object ⓘ multiple star system ⓘ star system ⓘ stellar system ⓘ |
| alsoKnownAs |
Alpha Crucis
ⓘ
surface form:
Acrux
Alpha Crucis ⓘ
surface form:
α Crucis
|
| apparentMagnitudeV | 0.76 ⓘ |
| belongsTo | Milky Way ⓘ |
| culturalSignificanceIn |
Australia
ⓘ
Brazil ⓘ New Zealand ⓘ |
| declination | −63° 05′ 56″ ⓘ |
| distanceFromEarth_ly | approximately 320 light-years ⓘ |
| distanceFromEarth_pc | approximately 98 parsecs ⓘ |
| hasBayerDesignation |
Alpha Crucis
self-linksurface differs
ⓘ
surface form:
α Crucis
|
| hasColorIndexBminusV | about −0.24 ⓘ |
| hasComponent |
Alpha Crucis
self-linksurface differs
ⓘ
surface form:
Alpha Crucis A
Alpha Crucis self-linksurface differs ⓘ
surface form:
Alpha Crucis B
Alpha Crucis self-linksurface differs ⓘ
surface form:
Alpha Crucis C
|
| hasConstellationAbbreviation | Cru ⓘ |
| hasFlamsteedDesignation | HR 4729 ⓘ |
| hasHDDesignation | HD 108248 ⓘ |
| hasHIPDesignation | HIP 60718 ⓘ |
| hasTraditionalName |
Alpha Crucis
self-linksurface differs
ⓘ
surface form:
Acrux
|
| isBrightestStarOf | Crux ⓘ |
| isDepictedOn |
Australian national flag
ⓘ
surface form:
Flag of Australia
flag of Brazil ⓘ
surface form:
Flag of Brazil
Flag of Mercosur ⓘ Flag of New Zealand ⓘ flag of Papua New Guinea ⓘ
surface form:
Flag of Papua New Guinea
flag of Samoa ⓘ
surface form:
Flag of Samoa
|
| isKeyStarOf | Southern Cross constellation ⓘ |
| isNavigationStar | true ⓘ |
| isPartOfAsterism | Southern Cross ⓘ |
| isSouthernmostStarOf | Southern Cross ⓘ |
| locatedIn | Southern celestial hemisphere ⓘ |
| locatedInConstellation | Crux ⓘ |
| notVisibleFrom | most of Northern Hemisphere ⓘ |
| rightAscension | 12h 26m 35s ⓘ |
| spectralClass | B0.5IV ⓘ |
| visibleFromLatitudeSouthOf | about +27 degrees ⓘ |
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 Crucis Description of subject: Alpha Crucis is the brightest star in the Southern Cross constellation and one of the key stars depicted on the Australian national flag.
Referenced by (19)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Acrux
this entity surface form:
Acrux
subject surface form:
Southern Cross
this entity surface form:
Acrux
subject surface form:
Southern Cross
this entity surface form:
Acrux
this entity surface form:
Acrux
this entity surface form:
α Crucis
this entity surface form:
Alpha Crucis A
this entity surface form:
Alpha Crucis B
this entity surface form:
Alpha Crucis C
this entity surface form:
α Crucis
this entity surface form:
Acrux
this entity surface form:
Acrux
this entity surface form:
Acrux
this entity surface form:
Acrux
this entity surface form:
Acrux