IC 349 region (nearby bright knot)
E581558
IC 349 region (nearby bright knot) is a small, intensely bright reflection nebula located very close to the star Merope in the Pleiades star cluster.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IC 349 region (nearby bright knot) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6287531 — 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 region (nearby bright knot) Context triple: [Merope Nebula, hasAlternativeName, IC 349 region (nearby bright knot)]
-
A.
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.
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B.
IC 348
IC 348 is a young, nearby star-forming cluster rich in pre-main-sequence stars, located within the Perseus constellation.
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C.
Barnard's Loop
Barnard's Loop is a large, faint emission nebula forming a sweeping arc across the constellation Orion, believed to be the remnant of ancient supernova activity.
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D.
IC 1848 (Soul Nebula)
IC 1848, commonly known as the Soul Nebula, is a large emission nebula and star-forming region in the constellation Cassiopeia, often photographed together with the nearby Heart Nebula.
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E.
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.
- 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 region (nearby bright knot) Target entity description: IC 349 region (nearby bright knot) is a small, intensely bright reflection nebula located very close to the star Merope in the Pleiades star cluster.
-
A.
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.
-
B.
IC 348
IC 348 is a young, nearby star-forming cluster rich in pre-main-sequence stars, located within the Perseus constellation.
-
C.
Barnard's Loop
Barnard's Loop is a large, faint emission nebula forming a sweeping arc across the constellation Orion, believed to be the remnant of ancient supernova activity.
-
D.
IC 1848 (Soul Nebula)
IC 1848, commonly known as the Soul Nebula, is a large emission nebula and star-forming region in the constellation Cassiopeia, often photographed together with the nearby Heart Nebula.
-
E.
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.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf | reflection nebula ⓘ |
| alternativeName |
Barnard's Merope Nebula
NERFINISHED
ⓘ
IC 349 region (nearby bright knot) NERFINISHED ⓘ |
| angularSize | about 30 arcseconds ⓘ |
| appearanceInImages | small intensely bright patch near Merope ⓘ |
| belongsToCluster | Pleiades open cluster NERFINISHED ⓘ |
| bestSeenIn | small to medium telescopes under dark skies ⓘ |
| brightness | very high surface brightness ⓘ |
| catalog | Index Catalogue (IC) NERFINISHED ⓘ |
| catalogNumber | IC 349 NERFINISHED ⓘ |
| clusterAgeContext | associated with young Pleiades cluster ⓘ |
| composition | interstellar dust ⓘ |
| constellation | Taurus NERFINISHED ⓘ |
| declination | +23° 47′ (approximate) ⓘ |
| discoveredBy | Edward Emerson Barnard NERFINISHED ⓘ |
| discoveryMethod | telescopic observation ⓘ |
| distanceFromEarth |
about 135 parsecs
ⓘ
about 440 light-years ⓘ |
| distanceFromStar |
about 0.06 light-years from Merope
ⓘ
about 3,500 astronomical units from Merope ⓘ |
| dominantRadiation | reflected starlight ⓘ |
| environment | dense region of the Pleiades dust cloud ⓘ |
| hostStar | Merope NERFINISHED ⓘ |
| illuminationSource | Merope NERFINISHED ⓘ |
| isPartOf | Merope nebula complex NERFINISHED ⓘ |
| locatedIn | Pleiades star cluster NERFINISHED ⓘ |
| locatedInConstellation | Taurus NERFINISHED ⓘ |
| morphology |
compact bright knot
ⓘ
fan-shaped structure ⓘ |
| near | Merope NERFINISHED ⓘ |
| notableFor |
extreme proximity to bright star Merope
ⓘ
very high contrast against surrounding nebula ⓘ |
| observedBy |
Hubble Space Telescope
NERFINISHED
ⓘ
ground-based observatories ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| rightAscension | 03h 46m (approximate) ⓘ |
| scientificInterest |
interaction of starlight with nearby dust
ⓘ
study of dust scattering properties ⓘ |
| spectralCharacteristic | continuum reflection spectrum ⓘ |
| surfaceBrightness | among the highest of known reflection nebulae ⓘ |
| typeOfNebula | dust reflection nebula ⓘ |
| visibility | northern hemisphere ⓘ |
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 region (nearby bright knot) Description of subject: IC 349 region (nearby bright knot) is a small, intensely bright reflection nebula located very close to the star Merope in the Pleiades star cluster.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.