David Dunlap Observatory (DDO) catalog
E561583
The David Dunlap Observatory (DDO) catalog is an astronomical catalog of dwarf galaxies compiled from observations at the David Dunlap Observatory, widely used in studies of nearby low-luminosity galaxies.
All labels observed (3)
| Label | Occurrences |
|---|---|
| David Dunlap Observatory (DDO) catalog canonical | 1 |
| David Dunlap Observatory Catalogue | 1 |
| David Dunlap Observatory survey | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6014260 — 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: David Dunlap Observatory (DDO) catalog Context triple: [Aquarius Dwarf Galaxy, wasCatalogedIn, David Dunlap Observatory (DDO) catalog]
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A.
Henry Draper Catalogue
The Henry Draper Catalogue is a pioneering astronomical star catalog that provides spectral classifications and designations for hundreds of thousands of stars, forming a foundational resource in stellar astronomy.
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B.
Smithsonian Astrophysical Observatory Star Catalogs
The Smithsonian Astrophysical Observatory Star Catalogs are comprehensive astronomical catalogs that provide precise positional and photometric data for millions of stars, widely used for research and satellite tracking.
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C.
Armagh Catalogue of Stars
The Armagh Catalogue of Stars is a 19th-century astronomical star catalog compiled at Armagh Observatory, listing precise positions and related data for thousands of stars.
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D.
UNDSS
UNDSS is the United Nations department responsible for providing leadership, operational support, and oversight of the UN’s security management system to ensure the safety and security of UN personnel and operations worldwide.
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E.
New General Catalogue
The New General Catalogue is a comprehensive 19th-century astronomical catalog of deep-sky objects, including galaxies, nebulae, and star clusters, that remains widely used by astronomers today.
- 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: David Dunlap Observatory (DDO) catalog Target entity description: The David Dunlap Observatory (DDO) catalog is an astronomical catalog of dwarf galaxies compiled from observations at the David Dunlap Observatory, widely used in studies of nearby low-luminosity galaxies.
-
A.
Henry Draper Catalogue
The Henry Draper Catalogue is a pioneering astronomical star catalog that provides spectral classifications and designations for hundreds of thousands of stars, forming a foundational resource in stellar astronomy.
-
B.
Smithsonian Astrophysical Observatory Star Catalogs
The Smithsonian Astrophysical Observatory Star Catalogs are comprehensive astronomical catalogs that provide precise positional and photometric data for millions of stars, widely used for research and satellite tracking.
-
C.
Armagh Catalogue of Stars
The Armagh Catalogue of Stars is a 19th-century astronomical star catalog compiled at Armagh Observatory, listing precise positions and related data for thousands of stars.
-
D.
UNDSS
UNDSS is the United Nations department responsible for providing leadership, operational support, and oversight of the UN’s security management system to ensure the safety and security of UN personnel and operations worldwide.
-
E.
New General Catalogue
The New General Catalogue is a comprehensive 19th-century astronomical catalog of deep-sky objects, including galaxies, nebulae, and star clusters, that remains widely used by astronomers today.
- F. None of above. chosen
Statements (24)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical catalog
ⓘ
dwarf galaxy catalog ⓘ |
| associatedWith | University of Toronto ⓘ |
| catalogsType |
dwarf irregular galaxies
ⓘ
galaxies ⓘ |
| compiledAt | David Dunlap Observatory ⓘ |
| focusesOn |
dwarf galaxies
ⓘ
low-luminosity galaxies ⓘ nearby galaxies ⓘ |
| hasAcronym | DDO catalog ⓘ |
| hasSubject |
morphology of dwarf galaxies
ⓘ
photometric properties of dwarf galaxies ⓘ spatial distribution of nearby dwarf galaxies ⓘ |
| isPartOf | observational studies of the local group and nearby groups ⓘ |
| namedAfter | David Dunlap Observatory ⓘ |
| observedWith | telescopes of the David Dunlap Observatory ⓘ |
| relatedTo | David Dunlap Observatory ⓘ |
| usedBy | astronomers studying low surface brightness galaxies ⓘ |
| usedFor |
studies of dwarf galaxies
ⓘ
studies of low-luminosity galaxies ⓘ studies of nearby galaxies ⓘ |
| usedIn |
extragalactic astronomy
ⓘ
galaxy evolution studies ⓘ local universe surveys ⓘ |
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: David Dunlap Observatory (DDO) catalog Description of subject: The David Dunlap Observatory (DDO) catalog is an astronomical catalog of dwarf galaxies compiled from observations at the David Dunlap Observatory, widely used in studies of nearby low-luminosity galaxies.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: David Dunlap Observatory (DDO) catalog