Sigma Orionis
E1342306
UNEXPLORED
Sigma Orionis is a bright multiple star system in the constellation Orion, best known for illuminating the nearby Horsehead Nebula.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Sigma Orionis canonical | 2 |
| Sigma Orionis multiple star system | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T18771403 — 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: Sigma Orionis Context triple: [Barnard 33, illuminatedBy, Sigma Orionis]
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A.
Beta Orionis
Beta Orionis, better known as Rigel, is a luminous blue supergiant star that serves as one of the brightest stars in the constellation Orion and in the night sky.
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B.
Gamma Orionis
Gamma Orionis, better known as Bellatrix, is a bright blue giant star in the constellation Orion that serves as one of its prominent shoulder stars.
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C.
Delta Orionis
Delta Orionis, traditionally known as Mintaka, is a multiple star system that forms the westernmost star in Orion’s Belt and serves as an important navigational and astrophysical reference point.
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D.
Sigma Sagittarii
Sigma Sagittarii is a bright blue-white giant star in the constellation Sagittarius, marking one of the prominent points of the Teapot asterism.
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E.
Orion Bar
Orion Bar is a bright, elongated photodissociation region at the edge of the Orion Nebula, where intense ultraviolet radiation from young massive stars shapes and illuminates dense molecular gas and dust.
- 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: Sigma Orionis Target entity description: Sigma Orionis is a bright multiple star system in the constellation Orion, best known for illuminating the nearby Horsehead Nebula.
-
A.
Beta Orionis
Beta Orionis, better known as Rigel, is a luminous blue supergiant star that serves as one of the brightest stars in the constellation Orion and in the night sky.
-
B.
Gamma Orionis
Gamma Orionis, better known as Bellatrix, is a bright blue giant star in the constellation Orion that serves as one of its prominent shoulder stars.
-
C.
Delta Orionis
Delta Orionis, traditionally known as Mintaka, is a multiple star system that forms the westernmost star in Orion’s Belt and serves as an important navigational and astrophysical reference point.
-
D.
Sigma Sagittarii
Sigma Sagittarii is a bright blue-white giant star in the constellation Sagittarius, marking one of the prominent points of the Teapot asterism.
-
E.
Orion Bar
Orion Bar is a bright, elongated photodissociation region at the edge of the Orion Nebula, where intense ultraviolet radiation from young massive stars shapes and illuminates dense molecular gas and dust.
- F. None of above. chosen
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Sigma Orionis