Castor Aa
E1489523
UNEXPLORED
Castor Aa is the primary A-type main-sequence star in the bright multiple-star system Castor (Alpha Geminorum) in the constellation Gemini.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Castor Aa canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T21523001 — 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: Castor Aa Context triple: [Alpha Geminorum, component, Castor Aa]
-
A.
Meissa
Meissa is a multiple-star system that marks the head of the constellation Orion and serves as one of its prominent stellar features.
-
B.
S Monocerotis
S Monocerotis is a variable star system located in the constellation Monoceros, known for its brightness changes over time.
-
C.
Alpha Eridani
Alpha Eridani, traditionally known as Achernar, is a bright, rapidly rotating blue-white star marking the southern end of the constellation Eridanus.
-
D.
Schedar
Schedar is a bright, orange giant star that serves as one of the principal stars marking the distinctive "W"-shaped constellation Cassiopeia in the northern sky.
-
E.
Almach
Almach is a bright multiple star system in the constellation Andromeda, notable for its striking color contrast when viewed through a telescope.
- 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: Castor Aa Target entity description: Castor Aa is the primary A-type main-sequence star in the bright multiple-star system Castor (Alpha Geminorum) in the constellation Gemini.
-
A.
Meissa
Meissa is a multiple-star system that marks the head of the constellation Orion and serves as one of its prominent stellar features.
-
B.
S Monocerotis
S Monocerotis is a variable star system located in the constellation Monoceros, known for its brightness changes over time.
-
C.
Alpha Eridani
Alpha Eridani, traditionally known as Achernar, is a bright, rapidly rotating blue-white star marking the southern end of the constellation Eridanus.
-
D.
Schedar
Schedar is a bright, orange giant star that serves as one of the principal stars marking the distinctive "W"-shaped constellation Cassiopeia in the northern sky.
-
E.
Almach
Almach is a bright multiple star system in the constellation Andromeda, notable for its striking color contrast when viewed through a telescope.
- F. None of above. chosen
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.