M28
E486890
M28 is a globular star cluster in the constellation Sagittarius, notable for its dense concentration of ancient stars and inclusion in Charles Messier’s famous catalog.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M28 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4983897 — 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: M28 Context triple: [Messier 28, catalogNumber, M28]
-
A.
M-28
M-28 is a major east–west state highway running across Michigan’s Upper Peninsula, connecting numerous communities along the southern shore of Lake Superior.
-
B.
M24
M24 is a rich star cloud in the constellation Sagittarius, visible as a bright patch of the Milky Way and often observed by amateur astronomers.
-
C.
M58
M58 is a motorway in North West England that links the M6 near Wigan to the Liverpool area, serving as a key route for traffic to and from Merseyside.
-
D.
M26
The M26 is a U.S. World War II–era heavy/medium tank, commonly known as the M26 Pershing, that served as a precursor to the American Patton tank series.
-
E.
M22
M22 is a bright globular star cluster in the constellation Sagittarius, notable for being one of the closest and most easily observed globular clusters from Earth.
- 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: M28 Target entity description: M28 is a globular star cluster in the constellation Sagittarius, notable for its dense concentration of ancient stars and inclusion in Charles Messier’s famous catalog.
-
A.
M-28
M-28 is a major east–west state highway running across Michigan’s Upper Peninsula, connecting numerous communities along the southern shore of Lake Superior.
-
B.
M24
M24 is a rich star cloud in the constellation Sagittarius, visible as a bright patch of the Milky Way and often observed by amateur astronomers.
-
C.
M58
M58 is a motorway in North West England that links the M6 near Wigan to the Liverpool area, serving as a key route for traffic to and from Merseyside.
-
D.
M26
The M26 is a U.S. World War II–era heavy/medium tank, commonly known as the M26 Pershing, that served as a precursor to the American Patton tank series.
-
E.
M22
M22 is a bright globular star cluster in the constellation Sagittarius, notable for being one of the closest and most easily observed globular clusters from Earth.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
deep-sky object ⓘ globular star cluster ⓘ |
| age | about 12 billion years ⓘ |
| angularSize | 11.2 arcminutes ⓘ |
| apparentMagnitudeV | 6.8 ⓘ |
| belongsTo |
Sagittarius constellation region near Galactic center
ⓘ
linked to:
Milky Way center
|
| catalogCode |
M28
ⓘ
NGC 6626 ⓘ |
| clusterType | Class IV globular cluster ⓘ |
| contains |
ancient stars
ⓘ
blue straggler stars ⓘ millisecond pulsars ⓘ pulsars ⓘ variable stars ⓘ |
| coreConcentration | high ⓘ |
| coreRadius | about 0.24 arcminutes ⓘ |
| declination | −24° 52′ ⓘ |
| discoveredBy | Charles Messier ⓘ |
| discoveryYear | 1764 ⓘ |
| distanceFromEarth |
approximately 18,000 light-years
ⓘ
approximately 5,500 parsecs ⓘ |
| GalacticLatitude | −5.6 degrees ⓘ |
| GalacticLongitude | 7.8 degrees ⓘ |
| halfLightRadius | about 1.56 arcminutes ⓘ |
| hasAlternativeName |
Messier 28
ⓘ
NGC 6626 ⓘ |
| hasColorIndexBminusV | approximately +0.7 ⓘ |
| hostGalaxy | Milky Way ⓘ |
| locatedIn |
Galactic bulge region
ⓘ
linked to:
Milky Way center
Milky Way ⓘ |
| locatedInConstellation | Sagittarius ⓘ |
| metallicityFeH | about −1.3 ⓘ |
| notableFor |
dense concentration of ancient stars
ⓘ
hosting multiple millisecond pulsars ⓘ inclusion in Charles Messier’s catalog ⓘ |
| observedIn |
X-ray wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| partOfCatalog |
Messier catalogue
ⓘ
New General Catalogue ⓘ |
| rightAscension | 18h 24m ⓘ |
| surfaceBrightness | relatively high for a globular cluster ⓘ |
| visibility |
best seen from southern latitudes
ⓘ
visible with binoculars under dark skies ⓘ |
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: M28 Description of subject: M28 is a globular star cluster in the constellation Sagittarius, notable for its dense concentration of ancient stars and inclusion in Charles Messier’s famous catalog.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.