IC 349
E581559
IC 349 is a small, bright reflection nebula in the Pleiades star cluster, illuminated by the nearby star Merope.
All labels observed (2)
| Label | Occurrences |
|---|---|
| IC 349 canonical | 4 |
| IC 349 region (nearby bright knot) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6287560 — 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: IC 349 Context triple: [Merope Nebula, nearbyObject, IC 349]
-
A.
IC 4665
IC 4665 is a bright, young open star cluster located in the constellation Ophiuchus, visible with binoculars or small telescopes.
-
B.
IC 4895
IC 4895 is a barred irregular dwarf galaxy in the Local Group, better known as NGC 6822 or Barnard's Galaxy, located in the constellation Sagittarius.
-
C.
IC 2574
IC 2574 is a dwarf irregular galaxy in the constellation Ursa Major, notable for its active star formation and membership in the nearby M81 Group of galaxies.
-
D.
IC 4725
IC 4725 is an open star cluster in the constellation Sagittarius, better known as Messier 25, visible with binoculars or small telescopes.
-
E.
IC 4756
IC 4756 is a large, bright open star cluster in the constellation Serpens, often observed as a rich field of moderately aged stars.
- 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: IC 349 Target entity description: IC 349 is a small, bright reflection nebula in the Pleiades star cluster, illuminated by the nearby star Merope.
-
A.
IC 4665
IC 4665 is a bright, young open star cluster located in the constellation Ophiuchus, visible with binoculars or small telescopes.
-
B.
IC 4895
IC 4895 is a barred irregular dwarf galaxy in the Local Group, better known as NGC 6822 or Barnard's Galaxy, located in the constellation Sagittarius.
-
C.
IC 2574
IC 2574 is a dwarf irregular galaxy in the constellation Ursa Major, notable for its active star formation and membership in the nearby M81 Group of galaxies.
-
D.
IC 4725
IC 4725 is an open star cluster in the constellation Sagittarius, better known as Messier 25, visible with binoculars or small telescopes.
-
E.
IC 4756
IC 4756 is a large, bright open star cluster in the constellation Serpens, often observed as a rich field of moderately aged stars.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
nebula
ⓘ
reflection nebula ⓘ |
| alsoKnownAs |
Barnard 33 (historical designation sometimes confused in literature)
ⓘ
linked to:
Barnard 33
Barnard's Merope Nebula ⓘ
linked to:
Merope Nebula
|
| angularSeparationFrom | about 36 arcseconds from Merope ⓘ |
| associatedWith |
Merope
ⓘ
Pleiades reflection nebulosity ⓘ
linked to:
Pleiades reflection nebulae
|
| catalogCode | IC 349 ⓘ |
| catalogIn | Index Catalogue ⓘ |
| declination | +23° 47′ (approximate) ⓘ |
| discoveredBy | Edward Emerson Barnard ⓘ |
| discoveryYear | 1890 ⓘ |
| distanceFromEarth |
about 135 parsecs
ⓘ
about 440 light-years ⓘ |
| hasAlternativeDesignation |
Barnard's Nebula near Merope
ⓘ
linked to:
Merope Nebula
|
| hasApparentSize | about 30 arcseconds (order of magnitude) ⓘ |
| hasColor | bluish ⓘ |
| hasDustComposition | interstellar dust grains ⓘ |
| hasMorphology |
high surface brightness core
ⓘ
small bright condensation of dust ⓘ |
| hasSpectralCharacteristic | continuum spectrum dominated by reflected starlight ⓘ |
| hasSurfaceBrightness | very high compared to surrounding Pleiades nebulosity ⓘ |
| hostGalaxy | Milky Way ⓘ |
| illuminatedBy | Merope ⓘ |
| inGalacticEnvironment | local spiral arm of the Milky Way ⓘ |
| isInOpenCluster | Pleiades ⓘ |
| isTypeOfReflectionNebula | starlight-scattering dust cloud ⓘ |
| locatedIn |
Pleiades star cluster
ⓘ
linked to:
Pleiades
constellation Taurus ⓘ |
| memberOf |
Pleiades star cluster
ⓘ
linked to:
Pleiades
|
| namedAfter |
Merope (indirectly, as Barnard's Merope Nebula)
ⓘ
linked to:
Merope Nebula
|
| near | Merope ⓘ |
| observedBy |
amateur astronomers with large telescopes
ⓘ
professional astronomers ⓘ |
| observedInWavelength |
infrared
ⓘ
visible light ⓘ |
| partOf |
Merope Nebula region
ⓘ
linked to:
Merope Nebula
|
| physicalNature | dust cloud reflecting starlight ⓘ |
| rightAscension | 03h 46m (approximate) ⓘ |
| skyLocationReference | near the star Merope in Taurus ⓘ |
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: IC 349 Description of subject: IC 349 is a small, bright reflection nebula in the Pleiades star cluster, illuminated by the nearby star Merope.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
IC 349 region (nearby bright knot)
linked to: IC 349
subject linked to:
IC 349 region (nearby bright knot)