DDO 210
E561581
DDO 210 is a faint dwarf irregular galaxy in the constellation Aquarius, notable for its low luminosity and sparse stellar population.
All labels observed (1)
| Label | Occurrences |
|---|---|
| DDO 210 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T6014240 — 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 210 Context triple: [Aquarius Dwarf Galaxy, hasAlternativeName, DDO 210]
-
A.
DDO 216
DDO 216 is a faint, nearby dwarf irregular galaxy in the constellation Pegasus that is part of the Local Group of galaxies.
-
B.
DDO 208
DDO 208 is a faint dwarf spheroidal galaxy in the constellation Draco that is one of the Milky Way’s satellite galaxies.
-
C.
DDO
DDO is a catalog of dwarf galaxies, particularly irregular and low-surface-brightness systems, widely used in extragalactic astronomy.
-
D.
DoDDS
DoDDS is a school system operated by the U.S. Department of Defense to provide education for the children of military and civilian personnel stationed overseas.
-
E.
DDO 82
DDO 82 is a dwarf irregular galaxy that is a member of the nearby M81 Group of galaxies.
- 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 210 Target entity description: DDO 210 is a faint dwarf irregular galaxy in the constellation Aquarius, notable for its low luminosity and sparse stellar population.
-
A.
DDO 216
DDO 216 is a faint, nearby dwarf irregular galaxy in the constellation Pegasus that is part of the Local Group of galaxies.
-
B.
DDO 208
DDO 208 is a faint dwarf spheroidal galaxy in the constellation Draco that is one of the Milky Way’s satellite galaxies.
-
C.
DDO
DDO is a catalog of dwarf galaxies, particularly irregular and low-surface-brightness systems, widely used in extragalactic astronomy.
-
D.
DoDDS
DoDDS is a school system operated by the U.S. Department of Defense to provide education for the children of military and civilian personnel stationed overseas.
-
E.
DDO 82
DDO 82 is a dwarf irregular galaxy that is a member of the nearby M81 Group of galaxies.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf | dwarf irregular galaxy ⓘ |
| absoluteMagnitudeV | about -10.9 ⓘ |
| angularSize | about 3 arcminutes ⓘ |
| apparentMagnitudeV | about 14.0 ⓘ |
| catalog |
David Dunlap Observatory Catalogue
ⓘ
linked to:
David Dunlap Observatory (DDO) catalog
|
| catalogDesignation | DDO 210 ⓘ |
| constellation | Aquarius ⓘ |
| contains |
intermediate-age stars
ⓘ
old stars ⓘ young stars ⓘ |
| darkMatterContent | dark-matter-dominated ⓘ |
| discovery | identified in the David Dunlap Observatory survey ⓘ |
| distanceFromEarth |
about 0.9 megaparsecs
ⓘ
about 3 million light-years ⓘ |
| environment | isolated dwarf galaxy in the Local Group ⓘ |
| galaxyType | irregular ⓘ |
| gasContent | gas-rich ⓘ |
| gasKinematics | shows irregular H I velocity field ⓘ |
| luminosity | low luminosity ⓘ |
| memberOf | Local Group ⓘ |
| metallicity | low metallicity ⓘ |
| morphologicalType | dIrr ⓘ |
| neutralHydrogenContent | contains significant H I gas ⓘ |
| otherName |
Aquarius Dwarf
ⓘ
Aquarius Dwarf Irregular Galaxy ⓘ
linked to:
Aquarius Dwarf Galaxy
|
| radialVelocity | approximately -140 km/s ⓘ |
| starFormationHistory | extended and sporadic ⓘ |
| starFormationRate | very low ⓘ |
| stellarPopulation | sparse ⓘ |
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 210 Description of subject: DDO 210 is a faint dwarf irregular galaxy in the constellation Aquarius, notable for its low luminosity and sparse stellar population.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.