Cassiopeia A
E1330060
UNEXPLORED
Cassiopeia A is a well-studied, relatively young supernova remnant in the constellation Cassiopeia and one of the strongest radio and X-ray sources in the sky.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Cassiopeia A canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T18552135 — 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: Cassiopeia A Context triple: [Cassiopeia, containsSupernovaRemnant, Cassiopeia A]
-
A.
Crab Nebula
The Crab Nebula is a famous supernova remnant and pulsar wind nebula in the constellation Taurus, formed by a stellar explosion observed on Earth in 1054 AD.
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B.
SN 1987A
SN 1987A is a famous supernova, the closest observed in modern times, whose 1987 explosion in the Large Magellanic Cloud has provided key insights into stellar death and supernova physics.
-
C.
Monoceros Loop supernova remnant
The Monoceros Loop supernova remnant is a large, faint shell of gas and dust in the constellation Monoceros, believed to be the remains of an ancient supernova explosion.
-
D.
Baade’s star
Baade’s star is a luminous, variable star in the Andromeda Galaxy notable for its role in Walter Baade’s work refining the cosmic distance scale.
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E.
Cygnus Loop
The Cygnus Loop is a large, faint supernova remnant in the constellation Cygnus, encompassing several prominent nebulae such as the Veil Nebula.
- 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: Cassiopeia A Target entity description: Cassiopeia A is a well-studied, relatively young supernova remnant in the constellation Cassiopeia and one of the strongest radio and X-ray sources in the sky.
-
A.
Crab Nebula
The Crab Nebula is a famous supernova remnant and pulsar wind nebula in the constellation Taurus, formed by a stellar explosion observed on Earth in 1054 AD.
-
B.
SN 1987A
SN 1987A is a famous supernova, the closest observed in modern times, whose 1987 explosion in the Large Magellanic Cloud has provided key insights into stellar death and supernova physics.
-
C.
Monoceros Loop supernova remnant
The Monoceros Loop supernova remnant is a large, faint shell of gas and dust in the constellation Monoceros, believed to be the remains of an ancient supernova explosion.
-
D.
Baade’s star
Baade’s star is a luminous, variable star in the Andromeda Galaxy notable for its role in Walter Baade’s work refining the cosmic distance scale.
-
E.
Cygnus Loop
The Cygnus Loop is a large, faint supernova remnant in the constellation Cygnus, encompassing several prominent nebulae such as the Veil Nebula.
- F. None of above. chosen
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.