Terzan 7
E117417
Terzan 7 is a relatively young, metal-rich globular cluster located in the constellation Sagittarius and dynamically associated with the Sagittarius Dwarf Spheroidal Galaxy.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Terzan 7 canonical | 2 |
| globular cluster Terzan 7 | 2 |
| A. Terzan | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T992647 — 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: Terzan 7 Context triple: [Sagittarius Dwarf Spheroidal Galaxy, associatedGlobularCluster, Terzan 7]
-
A.
Andromeda XII
Andromeda XII is a faint dwarf spheroidal galaxy that orbits the Andromeda Galaxy as one of its distant satellite members within the Local Group.
-
B.
Andromeda IV
Andromeda IV is a faint dwarf irregular galaxy located near the Andromeda Galaxy and belonging to the Local Group of galaxies.
-
C.
Andromeda VII
Andromeda VII is a dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
D.
Andromeda IX
Andromeda IX is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
E.
Messier 54
Messier 54 is a dense globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters found to belong to a dwarf galaxy outside the Milky Way.
- 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: Terzan 7 Target entity description: Terzan 7 is a relatively young, metal-rich globular cluster located in the constellation Sagittarius and dynamically associated with the Sagittarius Dwarf Spheroidal Galaxy.
-
A.
Andromeda XII
Andromeda XII is a faint dwarf spheroidal galaxy that orbits the Andromeda Galaxy as one of its distant satellite members within the Local Group.
-
B.
Andromeda IV
Andromeda IV is a faint dwarf irregular galaxy located near the Andromeda Galaxy and belonging to the Local Group of galaxies.
-
C.
Andromeda VII
Andromeda VII is a dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
D.
Andromeda IX
Andromeda IX is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
E.
Messier 54
Messier 54 is a dense globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters found to belong to a dwarf galaxy outside the Milky Way.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
globular cluster ⓘ |
| age | relatively young for a globular cluster ⓘ |
| ageInGyr | about 7.5 billion years ⓘ |
| alternativeName | Ter 7 ⓘ |
| angularSize | about 7 arcminutes ⓘ |
| apparentMagnitudeV | about 12.0 ⓘ |
| associatedWith | Sagittarius Dwarf Spheroidal Galaxy ⓘ |
| belongsTo |
Milky Way halo system
ⓘ
linked to:
Milky Way globular cluster system
outer halo globular clusters ⓘ |
| catalogDesignation | Terzan 7 ⓘ |
| chemicalAbundances |
enhanced s-process elements
ⓘ
low alpha-element enhancement ⓘ |
| clusterType | young halo globular cluster ⓘ |
| constellation | Sagittarius ⓘ |
| declination | approximately −34° 39′ ⓘ |
| discoveredBy |
A. Terzan
ⓘ
linked to:
Terzan 7
|
| discoveredInYear | 1968 ⓘ |
| discoveryMethod | optical observation ⓘ |
| distanceFromEarth | approximately 75,000 light-years ⓘ |
| distanceFromGalacticCenter | approximately 16 kiloparsecs ⓘ |
| distanceFromSun | approximately 23 kiloparsecs ⓘ |
| dynamicalAssociation | Sagittarius Dwarf Spheroidal Galaxy ⓘ |
| galacticComponent |
Milky Way halo
ⓘ
linked to:
Milky Way stellar halo
|
| galaxy | Sagittarius Dwarf Spheroidal Galaxy ⓘ |
| hostGalaxy | Sagittarius Dwarf Spheroidal Galaxy ⓘ |
| hostGalaxyType | dwarf spheroidal galaxy ⓘ |
| hostSystem |
Sagittarius dwarf spheroidal galaxy
ⓘ
linked to:
Sagittarius Dwarf Spheroidal Galaxy
|
| locatedIn | constellation Sagittarius ⓘ |
| memberOf | Sagittarius dwarf galaxy globular cluster system ⓘ |
| metallicity | metal-rich ⓘ |
| metallicityFeH | about −0.6 dex ⓘ |
| namedAfter | Agop Terzan ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| orbitalAssociation |
Sagittarius tidal stream
ⓘ
linked to:
Sagittarius Stream
|
| origin | accreted from Sagittarius Dwarf Spheroidal Galaxy ⓘ |
| rightAscension | approximately 19h 17m ⓘ |
| stellarPopulation |
intermediate-age
ⓘ
metal-rich population ⓘ |
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: Terzan 7 Description of subject: Terzan 7 is a relatively young, metal-rich globular cluster located in the constellation Sagittarius and dynamically associated with the Sagittarius Dwarf Spheroidal Galaxy.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Terzan 7
linked to: Terzan 7