Ursa Major Cluster
E561242
The Ursa Major Cluster is a relatively nearby, loose cluster of galaxies located in the constellation Ursa Major and forming part of the large-scale structure of the local universe.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Ursa Major Cluster canonical | 1 |
| Ursa Major galaxy cloud | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6016019 — 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 Major Cluster Context triple: [Virgo Supercluster, contains, Ursa Major Cluster]
-
A.
Eridanus Cluster
The Eridanus Cluster is a prominent galaxy cluster located in the constellation Eridanus, notable for its rich population of galaxies and role in studies of large-scale cosmic structure.
-
B.
Pisces Cluster
The Pisces Cluster is a galaxy cluster located within the Perseus–Pisces Supercluster, notable as part of one of the most prominent large-scale structures in the nearby universe.
-
C.
Great Hercules Cluster
The Great Hercules Cluster is a bright, densely packed globular star cluster in the constellation Hercules, visible in small telescopes and one of the most prominent such clusters in the northern sky.
-
D.
Jewel Box cluster
The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
-
E.
Trapezium Cluster
The Trapezium Cluster is a compact group of young, massive stars in the heart of the Orion Nebula that illuminates and shapes the surrounding star-forming region.
- 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 Major Cluster Target entity description: The Ursa Major Cluster is a relatively nearby, loose cluster of galaxies located in the constellation Ursa Major and forming part of the large-scale structure of the local universe.
-
A.
Eridanus Cluster
The Eridanus Cluster is a prominent galaxy cluster located in the constellation Eridanus, notable for its rich population of galaxies and role in studies of large-scale cosmic structure.
-
B.
Pisces Cluster
The Pisces Cluster is a galaxy cluster located within the Perseus–Pisces Supercluster, notable as part of one of the most prominent large-scale structures in the nearby universe.
-
C.
Great Hercules Cluster
The Great Hercules Cluster is a bright, densely packed globular star cluster in the constellation Hercules, visible in small telescopes and one of the most prominent such clusters in the northern sky.
-
D.
Jewel Box cluster
The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
-
E.
Trapezium Cluster
The Trapezium Cluster is a compact group of young, massive stars in the heart of the Orion Nebula that illuminates and shapes the surrounding star-forming region.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | galaxy cluster ⓘ |
| clusterType | loose cluster ⓘ |
| containsGalaxy |
M106
ⓘ
M108 ⓘ M109 ⓘ NGC 3631 ⓘ NGC 3726 ⓘ NGC 3729 ⓘ NGC 3769 ⓘ NGC 3877 ⓘ NGC 3893 ⓘ NGC 3896 ⓘ NGC 3949 ⓘ NGC 3953 ⓘ NGC 3985 ⓘ NGC 3990 ⓘ NGC 3998 ⓘ NGC 4013 ⓘ NGC 4026 ⓘ NGC 4051 ⓘ NGC 4088 ⓘ NGC 4100 ⓘ NGC 4111 ⓘ NGC 4138 ⓘ NGC 4143 ⓘ NGC 4157 ⓘ NGC 4183 ⓘ NGC 4217 ⓘ NGC 4605 ⓘ |
| distanceFromEarth |
approximately 18 megaparsecs
ⓘ
approximately 60 million light-years ⓘ |
| dominantGalaxyMorphology | spiral galaxies ⓘ |
| dominantGalaxyType | late-type galaxies ⓘ |
| environment | low X-ray luminosity ⓘ |
| hasAlternativeName |
Ursa Major cloud
ⓘ
Ursa Major galaxy cloud ⓘ
linked to:
Ursa Major Cluster
|
| hasApproximateMemberCount | several dozen bright galaxies ⓘ |
| hasNotableProperty |
contains many gas-rich spirals
ⓘ
part of nearby filamentary structures in the local universe ⓘ relatively low galaxy density compared to rich clusters ⓘ |
| locatedInConstellation | Ursa Major ⓘ |
| memberOf | local supercluster environment ⓘ |
| partOf | local universe large-scale structure ⓘ |
| redshift | approximately 0.003 ⓘ |
| richnessClass | poor cluster ⓘ |
| velocityDispersion | approximately 150 kilometers per second ⓘ |
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 Major Cluster Description of subject: The Ursa Major Cluster is a relatively nearby, loose cluster of galaxies located in the constellation Ursa Major and forming part of the large-scale structure of the local universe.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Ursa Major Cluster