DDO 53
E450575
DDO 53 is a faint dwarf irregular galaxy that is a member of the nearby M81 Group in the constellation Ursa Major.
All labels observed (1)
| Label | Occurrences |
|---|---|
| DDO 53 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4531651 — 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: DDO 53 Context triple: [M81 Group, containsGalaxy, DDO 53]
-
A.
DD 5.1
DD 5.1 is a surround sound audio format that delivers discrete multichannel sound, typically used in home theater systems, cinemas, and digital broadcasts.
-
B.
D.N.D.
D.N.D. is the standard legal abbreviation for the United States District Court for the District of North Dakota, a federal trial court within the Eighth Circuit.
-
C.
DDF
DDF is the commonly used abbreviation for the Dicastery for the Doctrine of the Faith, the Vatican department responsible for promoting and safeguarding Catholic doctrine.
-
D.
DDW
DDW is the abbreviation for Dutch Design Week, a major annual design event held in Eindhoven, the Netherlands, showcasing innovative work from designers across disciplines.
-
E.
Dodowa
Dodowa is a town in southern Ghana that serves as the capital of the Shai-Osudoku District and is known for its historic role in the Anglo-Ashanti wars and the nearby Dodowa Forest and waterfalls.
- 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: DDO 53 Target entity description: DDO 53 is a faint dwarf irregular galaxy that is a member of the nearby M81 Group in the constellation Ursa Major.
-
A.
DD 5.1
DD 5.1 is a surround sound audio format that delivers discrete multichannel sound, typically used in home theater systems, cinemas, and digital broadcasts.
-
B.
D.N.D.
D.N.D. is the standard legal abbreviation for the United States District Court for the District of North Dakota, a federal trial court within the Eighth Circuit.
-
C.
DDF
DDF is the commonly used abbreviation for the Dicastery for the Doctrine of the Faith, the Vatican department responsible for promoting and safeguarding Catholic doctrine.
-
D.
DDW
DDW is the abbreviation for Dutch Design Week, a major annual design event held in Eindhoven, the Netherlands, showcasing innovative work from designers across disciplines.
-
E.
Dodowa
Dodowa is a town in southern Ghana that serves as the capital of the Shai-Osudoku District and is known for its historic role in the Anglo-Ashanti wars and the nearby Dodowa Forest and waterfalls.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf irregular galaxy
ⓘ
galaxy ⓘ |
| apparentMagnitudeV | 14.7 ⓘ |
| barred | no ⓘ |
| belongsTo | nearby M81 Group of galaxies ⓘ |
| catalog |
DDO
ⓘ
PGC NERFINISHED ⓘ UGC ⓘ |
| constellation | Ursa Major NERFINISHED ⓘ |
| declination | +66° 10′ 54″ ⓘ |
| discoveredBy | Sidney van den Bergh NERFINISHED ⓘ |
| discoveryProgram | David Dunlap Observatory survey NERFINISHED ⓘ |
| distanceFromEarth |
3.6 megaparsecs
ⓘ
about 11.7 million light-years ⓘ |
| environment | group galaxy ⓘ |
| galaxyGroup | M81 Group NERFINISHED ⓘ |
| gasContent | gas-rich ⓘ |
| hasDarkMatterDominance | yes ⓘ |
| hasHIIRegions | yes ⓘ |
| hasIrregularMorphology | yes ⓘ |
| hasStarFormation | yes ⓘ |
| HIContent | extended neutral hydrogen envelope ⓘ |
| isFaint | yes ⓘ |
| isNearbyGalaxy | yes ⓘ |
| isResolvedIntoStars | yes ⓘ |
| locatedIn | Ursa Major NERFINISHED ⓘ |
| memberOf | M81 Group NERFINISHED ⓘ |
| metallicity | low-metallicity ⓘ |
| morphologicalType | Im ⓘ |
| namedAfter | David Dunlap Observatory catalog ⓘ |
| observedIn |
optical wavelengths
ⓘ
radio wavelengths ⓘ |
| otherDesignation |
PGC 21396
NERFINISHED
ⓘ
UGC 4459 NERFINISHED ⓘ VII Zw 189 ⓘ |
| partOf | Local Volume ⓘ |
| radialVelocity | 142 km/s ⓘ |
| redshift | 0.000474 ⓘ |
| rightAscension | 08h 34m 07s ⓘ |
| spiralStructure | none ⓘ |
| stellarPopulation | dominated by young and intermediate-age stars ⓘ |
| surfaceBrightness | low ⓘ |
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: DDO 53 Description of subject: DDO 53 is a faint dwarf irregular galaxy that is a member of the nearby M81 Group in the constellation Ursa Major.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.