Hydra II Dwarf Galaxy
E507099
Hydra II Dwarf Galaxy is a faint, ultra-low-luminosity satellite galaxy orbiting the Milky Way in the constellation Hydra.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Hydra II Dwarf Galaxy canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4618747 — 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: Hydra II Dwarf Galaxy Context triple: [Milky Way subgroup, hasMember, Hydra II Dwarf Galaxy]
-
A.
Leo II Dwarf Galaxy
Leo II Dwarf Galaxy is a faint, spheroidal dwarf galaxy and satellite of the Milky Way located in the constellation Leo and belonging to the Local Group of galaxies.
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B.
Pisces II Dwarf Galaxy
Pisces II Dwarf Galaxy is a faint, small satellite galaxy of the Milky Way located in the constellation Pisces and classified as an ultra-faint dwarf spheroidal galaxy.
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C.
Bootes II Dwarf Galaxy
Bootes II Dwarf Galaxy is a faint, ultra-low-luminosity satellite galaxy of the Milky Way located in the constellation Boötes.
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D.
Draco Dwarf Galaxy
Draco Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way, notable for its high dark matter content and very low rate of star formation.
-
E.
Reticulum II Dwarf Galaxy
Reticulum II Dwarf Galaxy is an ultra-faint satellite galaxy of the Milky Way notable for its extreme dark matter dominance and unusually high abundance of heavy r-process elements.
- 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: Hydra II Dwarf Galaxy Target entity description: Hydra II Dwarf Galaxy is a faint, ultra-low-luminosity satellite galaxy orbiting the Milky Way in the constellation Hydra.
-
A.
Leo II Dwarf Galaxy
Leo II Dwarf Galaxy is a faint, spheroidal dwarf galaxy and satellite of the Milky Way located in the constellation Leo and belonging to the Local Group of galaxies.
-
B.
Pisces II Dwarf Galaxy
Pisces II Dwarf Galaxy is a faint, small satellite galaxy of the Milky Way located in the constellation Pisces and classified as an ultra-faint dwarf spheroidal galaxy.
-
C.
Bootes II Dwarf Galaxy
Bootes II Dwarf Galaxy is a faint, ultra-low-luminosity satellite galaxy of the Milky Way located in the constellation Boötes.
-
D.
Draco Dwarf Galaxy
Draco Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way, notable for its high dark matter content and very low rate of star formation.
-
E.
Reticulum II Dwarf Galaxy
Reticulum II Dwarf Galaxy is an ultra-faint satellite galaxy of the Milky Way notable for its extreme dark matter dominance and unusually high abundance of heavy r-process elements.
- F. None of above. chosen
Statements (27)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf galaxy
ⓘ
ultra-faint dwarf galaxy ⓘ |
| belongsToCategory |
Local Group dwarf galaxies
ⓘ
Milky Way satellite galaxies ⓘ |
| discoveredBy | Dark Energy Survey ⓘ |
| discoveryMethod | wide-field imaging survey ⓘ |
| distanceReferenceFrame | from Earth ⓘ |
| environment |
Milky Way halo
ⓘ
linked to:
Milky Way stellar halo
|
| galaxyType | dwarf spheroidal galaxy ⓘ |
| hasApparentBrightness | faint ⓘ |
| hasDarkMatterContent | dark-matter-dominated ⓘ |
| hasLuminosityClass | ultra-low-luminosity ⓘ |
| hasMorphology | diffuse ⓘ |
| hasRedshift | low redshift ⓘ |
| hasStarFormationActivity |
quiescent
ⓘ
very low ⓘ |
| hasStellarPopulation |
metal-poor stars
ⓘ
old stars ⓘ |
| hasSurfaceBrightness | very low surface brightness ⓘ |
| hostGalaxy | Milky Way ⓘ |
| isGravitationallyBoundTo | Milky Way ⓘ |
| locatedInConstellation | Hydra ⓘ |
| memberOf | Local Group ⓘ |
| orbits | Milky Way ⓘ |
| satelliteOf | Milky Way ⓘ |
| skyLocation | southern celestial hemisphere ⓘ |
| survey | Dark Energy Survey ⓘ |
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: Hydra II Dwarf Galaxy Description of subject: Hydra II Dwarf Galaxy is a faint, ultra-low-luminosity satellite galaxy orbiting the Milky Way in the constellation Hydra.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.