Sharpless 2-275
E450952
Sharpless 2-275 is a large, circular emission nebula in the constellation Monoceros, notable for its active star-forming region and striking rose-like appearance.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Sh2-275 | 3 |
| Sharpless 2-275 canonical | 3 |
| Sharpless 275 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4531462 — 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: Sharpless 2-275 Context triple: [Rosette Nebula, hasAlternativeName, Sharpless 2-275]
-
A.
Collinder 232
Collinder 232 is an open star cluster located within the Carina Nebula in the constellation Carina.
-
B.
Collinder 228
Collinder 228 is an open star cluster embedded in the Carina Nebula, notable for its young, massive stars that help illuminate and shape the surrounding gas and dust.
-
C.
Melotte 22
Melotte 22 is an open star cluster in the constellation Taurus, more commonly known as the Pleiades or Seven Sisters, famed for its bright, blue-hot stars and visibility to the naked eye.
-
D.
NGC 7320
NGC 7320 is a foreground spiral galaxy in the constellation Pegasus that appears as part of Stephan’s Quintet but is actually much closer to Earth than the other members.
-
E.
Messier 20
Messier 20, also known as the Trifid Nebula, is a bright, star-forming emission and reflection nebula famous for its striking three-lobed appearance.
- 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: Sharpless 2-275 Target entity description: Sharpless 2-275 is a large, circular emission nebula in the constellation Monoceros, notable for its active star-forming region and striking rose-like appearance.
-
A.
Collinder 232
Collinder 232 is an open star cluster located within the Carina Nebula in the constellation Carina.
-
B.
Collinder 228
Collinder 228 is an open star cluster embedded in the Carina Nebula, notable for its young, massive stars that help illuminate and shape the surrounding gas and dust.
-
C.
Melotte 22
Melotte 22 is an open star cluster in the constellation Taurus, more commonly known as the Pleiades or Seven Sisters, famed for its bright, blue-hot stars and visibility to the naked eye.
-
D.
NGC 7320
NGC 7320 is a foreground spiral galaxy in the constellation Pegasus that appears as part of Stephan’s Quintet but is actually much closer to Earth than the other members.
-
E.
Messier 20
Messier 20, also known as the Trifid Nebula, is a bright, star-forming emission and reflection nebula famous for its striking three-lobed appearance.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
emission nebula ⓘ star-forming region ⓘ |
| alsoKnownAs |
Rosette Nebula
ⓘ
Sh 2-275 ⓘ Sh2-275 ⓘ
linked to:
Sharpless 2-275
|
| catalogueDesignation | Sharpless 2-275 ⓘ |
| composedPrimarilyOf | ionized hydrogen gas ⓘ |
| contains | open cluster NGC 2244 ⓘ |
| emitsStronglyIn | H-alpha ⓘ |
| excitedBy | massive stars in NGC 2244 ⓘ |
| hasAngularSize | large ⓘ |
| hasApparentShape | circular ⓘ |
| hasAstrophysicalProcess |
stellar wind erosion
ⓘ
triggered star formation ⓘ |
| hasNotableFeature |
active star formation
ⓘ
central star cluster ⓘ |
| hasStructure |
cavity cleared by stellar winds
ⓘ
surrounding molecular cloud ⓘ |
| hasVisualAppearance | rose-like ⓘ |
| isObservedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| isRegionOf | Milky Way ⓘ |
| isTargetOf |
amateur astrophotography
ⓘ
professional star-formation studies ⓘ |
| isTypeOf | diffuse nebula ⓘ |
| locatedIn |
Orion Arm of the Milky Way
ⓘ
linked to:
Orion Arm
|
| locatedInConstellation | Monoceros ⓘ |
| partOfCatalogue | Sharpless catalogue ⓘ |
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: Sharpless 2-275 Description of subject: Sharpless 2-275 is a large, circular emission nebula in the constellation Monoceros, notable for its active star-forming region and striking rose-like appearance.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Sharpless 2-275
linked to: Sharpless 2-275
linked to: Sharpless 2-275
linked to: Sharpless 2-275