Type IIb (SN 1993J)
E1324751
UNEXPLORED
Type IIb (SN 1993J) is a well-studied core-collapse supernova in the galaxy Messier 81 that initially showed hydrogen-rich spectra before transitioning to resemble a Type Ib event, making it a key example of a stripped-envelope supernova.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Type IIb (SN 1993J) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T18442692 — 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: Type IIb (SN 1993J) Context triple: [Messier 81, supernovaType, Type IIb (SN 1993J)]
-
A.
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.
-
B.
SN 1572
SN 1572 is a historically significant supernova in the constellation Cassiopeia whose detailed observations by Tycho Brahe helped challenge the Aristotelian view of an unchanging heavens.
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C.
Type Ia supernovae
Type Ia supernovae are a class of stellar explosions with nearly uniform intrinsic brightness, making them powerful standard candles for measuring cosmic distances and probing the expansion history of the universe.
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D.
supernova SN 1954J
Supernova SN 1954J is a mid-20th-century stellar explosion event in an external galaxy that became notable through detailed optical observations and analysis by astronomers.
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E.
V838 Monocerotis
V838 Monocerotis is a peculiar variable star best known for its spectacular 2002 outburst and subsequent expanding light echo, which produced some of the most striking astronomical images ever captured by the Hubble Space 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: Type IIb (SN 1993J) Target entity description: Type IIb (SN 1993J) is a well-studied core-collapse supernova in the galaxy Messier 81 that initially showed hydrogen-rich spectra before transitioning to resemble a Type Ib event, making it a key example of a stripped-envelope supernova.
-
A.
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.
-
B.
SN 1572
SN 1572 is a historically significant supernova in the constellation Cassiopeia whose detailed observations by Tycho Brahe helped challenge the Aristotelian view of an unchanging heavens.
-
C.
Type Ia supernovae
Type Ia supernovae are a class of stellar explosions with nearly uniform intrinsic brightness, making them powerful standard candles for measuring cosmic distances and probing the expansion history of the universe.
-
D.
supernova SN 1954J
Supernova SN 1954J is a mid-20th-century stellar explosion event in an external galaxy that became notable through detailed optical observations and analysis by astronomers.
-
E.
V838 Monocerotis
V838 Monocerotis is a peculiar variable star best known for its spectacular 2002 outburst and subsequent expanding light echo, which produced some of the most striking astronomical images ever captured by the Hubble Space Telescope.
- F. None of above. chosen
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.