Sanduleak -69 202
E481644
Sanduleak -69 202 was a blue supergiant star in the Large Magellanic Cloud that famously exploded as Supernova 1987A, the closest observed supernova in modern times.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Sanduleak -69 202 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4943444 — 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: Sanduleak -69 202 Context triple: [SN 1987A, progenitorStar, Sanduleak -69 202]
-
A.
Sandon
Sandon is a small rural village in the North Hertfordshire district of Hertfordshire, England, characterized by its agricultural surroundings and traditional English countryside setting.
-
B.
Sand Saref
Sand Saref is a seductive and morally ambiguous femme fatale from the comic-book-inspired film "The Spirit," known for her complex past with the titular hero and her pursuit of priceless artifacts.
-
C.
Sandi
Sandi is a given name, typically a variant of Sandy, used for both males and females.
-
D.
Sabden
Sabden is a small village and civil parish in Lancashire, England, situated in a valley near Pendle Hill and known for its scenic rural setting.
-
E.
Sands
Sands is a ruthless, manipulative CIA agent portrayed by Johnny Depp in the action film "Once Upon a Time in Mexico."
- 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: Sanduleak -69 202 Target entity description: Sanduleak -69 202 was a blue supergiant star in the Large Magellanic Cloud that famously exploded as Supernova 1987A, the closest observed supernova in modern times.
-
A.
Sandon
Sandon is a small rural village in the North Hertfordshire district of Hertfordshire, England, characterized by its agricultural surroundings and traditional English countryside setting.
-
B.
Sand Saref
Sand Saref is a seductive and morally ambiguous femme fatale from the comic-book-inspired film "The Spirit," known for her complex past with the titular hero and her pursuit of priceless artifacts.
-
C.
Sandi
Sandi is a given name, typically a variant of Sandy, used for both males and females.
-
D.
Sabden
Sabden is a small village and civil parish in Lancashire, England, situated in a valley near Pendle Hill and known for its scenic rural setting.
-
E.
Sands
Sands is a ruthless, manipulative CIA agent portrayed by Johnny Depp in the action film "Once Upon a Time in Mexico."
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
blue supergiant star
ⓘ
massive star ⓘ supernova progenitor ⓘ |
| apparentMagnitudeBeforeExplosion | about 12 ⓘ |
| catalogDesignation | Sk -69 202 NERFINISHED ⓘ |
| cataloguedBy | Nicholas Sanduleak NERFINISHED ⓘ |
| color | blue ⓘ |
| comparison | unusual because many Type II supernovae come from red supergiants ⓘ |
| coordinateSystem | equatorial coordinates ⓘ |
| distanceFromEarth |
about 168000 light-years
ⓘ
about 51 kiloparsecs ⓘ |
| evolutionaryStageBeforeExplosion | blue supergiant phase ⓘ |
| explodedAs | Supernova 1987A NERFINISHED ⓘ |
| explosionDesignation | SN 1987A NERFINISHED ⓘ |
| explosionType | Type II supernova ⓘ |
| explosionYear | 1987 ⓘ |
| hostEnvironment | star-forming region in the Large Magellanic Cloud ⓘ |
| hostGalaxy | Large Magellanic Cloud NERFINISHED ⓘ |
| locatedIn |
Large Magellanic Cloud
NERFINISHED
ⓘ
constellation Dorado ⓘ |
| luminosityClass | I (supergiant) ⓘ |
| mass | roughly 18–20 solar masses ⓘ |
| notableFor |
being progenitor of SN 1987A
ⓘ
being the closest observed supernova progenitor in modern times ⓘ |
| observedAsProgenitorIn | pre-1987 photographic plates ⓘ |
| preExplosionIdentification | Sanduleak -69 202 NERFINISHED ⓘ |
| remnant | SN 1987A supernova remnant NERFINISHED ⓘ |
| researchSignificance | key object for studying core-collapse supernova progenitors ⓘ |
| spectralType | B3 I ⓘ |
| status | destroyed in supernova explosion ⓘ |
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: Sanduleak -69 202 Description of subject: Sanduleak -69 202 was a blue supergiant star in the Large Magellanic Cloud that famously exploded as Supernova 1987A, the closest observed supernova in modern times.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.