Ursa Minor dSph
E539931
Ursa Minor dSph is a faint dwarf spheroidal satellite galaxy of the Milky Way located in the constellation Ursa Minor.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ursa Minor dSph canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5683831 — 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: Ursa Minor dSph Context triple: [Ursa Minor Dwarf Galaxy, alternativeName, Ursa Minor dSph]
-
A.
Pegasus dSph
Pegasus dSph is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located in the constellation Pegasus.
-
B.
Draco dSph
Draco dSph is a faint, dark-matter-dominated dwarf spheroidal galaxy that orbits the Milky Way in the constellation Draco.
-
C.
Carina dSph
Carina dSph is a faint dwarf spheroidal satellite galaxy of the Milky Way located in the constellation Carina.
-
D.
Sextans Dwarf Spheroidal Galaxy
The Sextans Dwarf Spheroidal Galaxy is a faint, low-mass satellite galaxy of the Milky Way located in the constellation Sextans and composed primarily of old, metal-poor stars.
-
E.
Pegasus Dwarf Spheroidal Galaxy
Pegasus Dwarf Spheroidal Galaxy is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located in the Local Group.
- 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: Ursa Minor dSph Target entity description: Ursa Minor dSph is a faint dwarf spheroidal satellite galaxy of the Milky Way located in the constellation Ursa Minor.
-
A.
Pegasus dSph
Pegasus dSph is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located in the constellation Pegasus.
-
B.
Draco dSph
Draco dSph is a faint, dark-matter-dominated dwarf spheroidal galaxy that orbits the Milky Way in the constellation Draco.
-
C.
Carina dSph
Carina dSph is a faint dwarf spheroidal satellite galaxy of the Milky Way located in the constellation Carina.
-
D.
Sextans Dwarf Spheroidal Galaxy
The Sextans Dwarf Spheroidal Galaxy is a faint, low-mass satellite galaxy of the Milky Way located in the constellation Sextans and composed primarily of old, metal-poor stars.
-
E.
Pegasus Dwarf Spheroidal Galaxy
Pegasus Dwarf Spheroidal Galaxy is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located in the Local Group.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf | dwarf spheroidal galaxy ⓘ |
| absoluteMagnitudeV | about −8.8 ⓘ |
| alternativeName |
PGC 54074
NERFINISHED
ⓘ
UGC 9749 NERFINISHED ⓘ Ursa Minor Dwarf NERFINISHED ⓘ |
| apparentMagnitudeV | about 10.9 ⓘ |
| belongsTo | Milky Way satellite system NERFINISHED ⓘ |
| contains |
RR Lyrae variables
NERFINISHED
ⓘ
horizontal branch stars ⓘ red giant branch stars ⓘ |
| coordinateSystem | equatorial ⓘ |
| darkMatterContent | dark-matter-dominated ⓘ |
| declination | +67° 13′ ⓘ |
| discoveredBy | A. G. Wilson NERFINISHED ⓘ |
| discoveredUsing | Palomar Observatory Sky Survey NERFINISHED ⓘ |
| discoveryYear | 1954 ⓘ |
| distanceFromEarth |
~215,000 light-years
ⓘ
~66 kpc ⓘ |
| dominantStellarPopulationAge | >10 Gyr ⓘ |
| environment | Galactic halo ⓘ |
| galaxyType | dSph ⓘ |
| gasContent | gas-poor ⓘ |
| gasPhaseStarFormation | absent ⓘ |
| halfLightRadius | ~300 pc ⓘ |
| hasGlobularClusters | false ⓘ |
| hasNucleus | false ⓘ |
| isFaint | true ⓘ |
| isResolvedIntoStars | true ⓘ |
| locatedIn | Ursa Minor constellation region of the sky ⓘ |
| locatedInConstellation | Ursa Minor NERFINISHED ⓘ |
| memberOf | Local Group NERFINISHED ⓘ |
| metallicity | very metal-poor ⓘ |
| morphologicalType | dE3 ⓘ |
| observationalChallenge | low surface brightness ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| orbitalRelationToMilkyWay | bound satellite ⓘ |
| radialVelocity | about −247 km/s ⓘ |
| rightAscension | 15h 09m ⓘ |
| satelliteOf | Milky Way NERFINISHED ⓘ |
| shape | elongated ⓘ |
| starFormationActivity | quiescent ⓘ |
| stellarKinematics | pressure-supported ⓘ |
| stellarPopulation | old ⓘ |
| surfaceBrightness | very 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: Ursa Minor dSph Description of subject: Ursa Minor dSph is a faint dwarf spheroidal satellite galaxy of the Milky Way located in the constellation Ursa Minor.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.