Bootes II Dwarf Galaxy
E492285
Bootes II Dwarf Galaxy is a faint, ultra-low-luminosity satellite galaxy of the Milky Way located in the constellation Boötes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Bootes II Dwarf Galaxy canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4618736 — 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: Bootes II Dwarf Galaxy Context triple: [Milky Way subgroup, hasMember, Bootes II Dwarf Galaxy]
-
A.
Bootes I Dwarf Galaxy
Bootes I Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the constellation Boötes and known for its very low luminosity and dark-matter dominance.
-
B.
Canes Venatici II Dwarf Galaxy
Canes Venatici II Dwarf Galaxy is a faint, small satellite galaxy of the Milky Way located in the constellation Canes Venatici and classified as an ultra-faint dwarf spheroidal galaxy.
-
C.
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.
-
D.
Ursa Major II Dwarf Galaxy
Ursa Major II Dwarf Galaxy is a faint, dark-matter-dominated dwarf spheroidal satellite galaxy orbiting the Milky Way in the constellation Ursa Major.
-
E.
Aquarius Dwarf Galaxy
The Aquarius Dwarf Galaxy is a faint, small dwarf irregular galaxy on the outskirts of the Local Group, notable for its low luminosity and sparse stellar population.
- 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: Bootes II Dwarf Galaxy Target entity description: Bootes II Dwarf Galaxy is a faint, ultra-low-luminosity satellite galaxy of the Milky Way located in the constellation Boötes.
-
A.
Bootes I Dwarf Galaxy
Bootes I Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the constellation Boötes and known for its very low luminosity and dark-matter dominance.
-
B.
Canes Venatici II Dwarf Galaxy
Canes Venatici II Dwarf Galaxy is a faint, small satellite galaxy of the Milky Way located in the constellation Canes Venatici and classified as an ultra-faint dwarf spheroidal galaxy.
-
C.
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.
-
D.
Ursa Major II Dwarf Galaxy
Ursa Major II Dwarf Galaxy is a faint, dark-matter-dominated dwarf spheroidal satellite galaxy orbiting the Milky Way in the constellation Ursa Major.
-
E.
Aquarius Dwarf Galaxy
The Aquarius Dwarf Galaxy is a faint, small dwarf irregular galaxy on the outskirts of the Local Group, notable for its low luminosity and sparse stellar population.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf spheroidal galaxy
ⓘ
ultra-faint dwarf galaxy ⓘ |
| absoluteMagnitudeV_approx | about −2.7 ⓘ |
| alternativeName |
Boo II
ⓘ
Boötes II ⓘ |
| apparentSize_approx | a few arcminutes ⓘ |
| constellation |
Boötes
ⓘ
linked to:
Bootes
|
| darkMatterContent | dark-matter-dominated ⓘ |
| declination_approx | +12° ⓘ |
| discoveredBy |
SDSS (Sloan Digital Sky Survey)
ⓘ
linked to:
Sloan Digital Sky Survey
|
| discoveryMethod | analysis of Sloan Digital Sky Survey data ⓘ |
| discoveryYear_approx | 2007 ⓘ |
| distanceFromEarth_approx |
about 130,000 light-years
ⓘ
about 42 kiloparsecs ⓘ |
| galacticLatitude_approx | +69° ⓘ |
| galacticLongitude_approx | 353° ⓘ |
| hemisphere | Northern celestial hemisphere ⓘ |
| hostGalaxy | Milky Way ⓘ |
| luminosityClass | ultra-low-luminosity ⓘ |
| massToLightRatio | high mass-to-light ratio ⓘ |
| memberOf | Local Group ⓘ |
| metallicity | very metal-poor ⓘ |
| nearbyObject |
Boötes I Dwarf Galaxy
ⓘ
linked to:
Bootes I Dwarf Galaxy
|
| redshift_approx | near 0 (Local Group object) ⓘ |
| rightAscension_approx | 13h 58m ⓘ |
| satelliteOf | Milky Way ⓘ |
| stellarPopulation | old stars ⓘ |
| surfaceBrightness | very low surface brightness ⓘ |
| visibility | requires large telescopes or deep imaging ⓘ |
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: Bootes II Dwarf Galaxy Description of subject: Bootes II Dwarf Galaxy is a faint, ultra-low-luminosity satellite galaxy of the Milky Way located in the constellation Boötes.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.