Melotte 22
E111956
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Melotte 22 canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T869981 — 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: Melotte 22 Context triple: [Seven Sisters, catalogCode, Melotte 22]
-
A.
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.
-
B.
Messier 17
Messier 17, also known as the Omega or Swan Nebula, is a bright star-forming emission nebula located in the constellation Sagittarius.
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C.
Messier 22
Messier 22 is a bright globular star cluster located near the center of the Milky Way, visible in the constellation Sagittarius and notable for being one of the closest and most easily observed clusters of its kind.
-
D.
NGC 6822
NGC 6822 is a barred irregular dwarf galaxy located in the constellation Sagittarius and is one of the nearest and best-studied galaxies outside the Milky Way.
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E.
Messier 25
Messier 25 is an open star cluster located in the constellation Sagittarius, visible to the naked eye under dark skies.
- 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: Melotte 22 Target entity description: 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.
-
A.
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.
-
B.
Messier 17
Messier 17, also known as the Omega or Swan Nebula, is a bright star-forming emission nebula located in the constellation Sagittarius.
-
C.
Messier 22
Messier 22 is a bright globular star cluster located near the center of the Milky Way, visible in the constellation Sagittarius and notable for being one of the closest and most easily observed clusters of its kind.
-
D.
NGC 6822
NGC 6822 is a barred irregular dwarf galaxy located in the constellation Sagittarius and is one of the nearest and best-studied galaxies outside the Milky Way.
-
E.
Messier 25
Messier 25 is an open star cluster located in the constellation Sagittarius, visible to the naked eye under dark skies.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
NGC object ⓘ deep-sky object ⓘ open star cluster ⓘ |
| age | about 100 million years ⓘ |
| alsoKnownAs |
M45
ⓘ
Messier 45 ⓘ Pleiades ⓘ Seven Sisters ⓘ Subaru ⓘ |
| angularSize | ~110 arcminutes ⓘ |
| apparentMagnitudeV | 1.6 ⓘ |
| bestSeenFromHemisphere | Northern Hemisphere ⓘ |
| bestViewingSeason | northern winter ⓘ |
| brightestStarsVisibleToNakedEye | 6 to 9 ⓘ |
| catalogDesignation |
M45
ⓘ
Melotte 22 ⓘ NGC 1432 ⓘ NGC 1435 ⓘ
linked to:
NGC 1432
|
| color | blue ⓘ |
| constellation | Taurus ⓘ |
| culturalSignificance |
featured in many world cultures’ star lore
ⓘ
important in Greek mythology as the Seven Sisters ⓘ |
| declination | +24° 07′ ⓘ |
| discovery | known since antiquity ⓘ |
| distanceFromEarth |
about 135 parsecs
ⓘ
about 440 light-years ⓘ |
| dominantStellarType | B-type main-sequence stars ⓘ |
| galacticLatitude | about −23° ⓘ |
| galacticLongitude | about 166° ⓘ |
| hasFeature | reflection nebula ⓘ |
| locatedIn |
Milky Way
ⓘ
Orion Arm ⓘ |
| nebulaType | reflection nebula ⓘ |
| notableStar |
Alcyone
ⓘ
Atlas ⓘ Celaeno ⓘ Electra ⓘ Maia ⓘ Merope ⓘ Pleione ⓘ Sterope ⓘ Taygeta ⓘ |
| numberOfStars | over 1000 ⓘ |
| observability | easily seen without optical aid in dark skies ⓘ |
| properMotion | member of the Pleiades moving group ⓘ |
| rightAscension | 03h 47m ⓘ |
| visibility | visible to the naked eye ⓘ |
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: Melotte 22 Description of subject: 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.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.