Bootes I Dwarf Galaxy
E490823
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Bootes I Dwarf Galaxy canonical | 1 |
| Boötes I Dwarf Galaxy | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4618735 — 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 I Dwarf Galaxy Context triple: [Milky Way subgroup, hasMember, Bootes I Dwarf Galaxy]
-
A.
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.
-
B.
Carina Dwarf Galaxy
The Carina Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the Local Group, notable for its low luminosity and predominantly old stellar population.
-
C.
Cetus Dwarf Galaxy
The Cetus Dwarf Galaxy is a faint, spheroidal dwarf galaxy located in the constellation Cetus and is one of the small satellite members of our cosmic neighborhood.
-
D.
Canes Venatici I Dwarf Galaxy
Canes Venatici I Dwarf Galaxy is a faint dwarf spheroidal satellite galaxy of the Milky Way located in the constellation Canes Venatici.
-
E.
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.
- 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 I Dwarf Galaxy Target entity description: 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.
-
A.
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.
-
B.
Carina Dwarf Galaxy
The Carina Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the Local Group, notable for its low luminosity and predominantly old stellar population.
-
C.
Cetus Dwarf Galaxy
The Cetus Dwarf Galaxy is a faint, spheroidal dwarf galaxy located in the constellation Cetus and is one of the small satellite members of our cosmic neighborhood.
-
D.
Canes Venatici I Dwarf Galaxy
Canes Venatici I Dwarf Galaxy is a faint dwarf spheroidal satellite galaxy of the Milky Way located in the constellation Canes Venatici.
-
E.
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.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf spheroidal galaxy
ⓘ
ultra-faint dwarf galaxy ⓘ |
| absoluteMagnitudeV | about −5.8 ⓘ |
| alternativeName |
Boötes I
ⓘ
Boötes I dSph ⓘ |
| belongsTo | Local Group ⓘ |
| contains | very metal-poor stars ⓘ |
| darkMatterMass | of order 10^7 solar masses ⓘ |
| declination | approximately +14° ⓘ |
| discoveredBy |
V. Belokurov
ⓘ
collaborators in the Sloan Digital Sky Survey ⓘ |
| discoveryMethod | Sloan Digital Sky Survey data analysis ⓘ |
| discoveryYear | 2006 ⓘ |
| distanceFromEarth |
approximately 200,000 light-years
ⓘ
approximately 60 kiloparsecs ⓘ |
| environment |
Milky Way outer halo
ⓘ
linked to:
Milky Way stellar halo
|
| galaxyType | spheroidal ⓘ |
| halfLightRadius | about 200 parsecs ⓘ |
| hasProperty |
dark-matter dominated
ⓘ
faint ⓘ metal-poor ⓘ old stellar population ⓘ very low luminosity ⓘ |
| hostGalaxy | Milky Way ⓘ |
| locatedInConstellation |
Boötes
ⓘ
linked to:
Bootes
|
| luminosity | about 10,000 times the luminosity of the Sun ⓘ |
| massToLightRatio |
of order hundreds in solar units
ⓘ
very high ⓘ |
| meanMetallicity | [Fe/H] around −2.5 ⓘ |
| morphologicalType | dSph ⓘ |
| namedAfter |
constellation Boötes
ⓘ
linked to:
Bootes
|
| observedInSurvey | Sloan Digital Sky Survey ⓘ |
| orbitalRelation | satellite of the Milky Way halo ⓘ |
| redshift | approximately 0 ⓘ |
| researchInterest |
constraining galaxy formation in low-mass halos
ⓘ
studying early chemical enrichment ⓘ testing dark matter models ⓘ |
| rightAscension | approximately 14h 00m ⓘ |
| starFormationHistory |
dominated by ancient stars
ⓘ
little or no recent star formation ⓘ |
| stellarMass | of order 10^4 solar masses ⓘ |
| surfaceBrightness | extremely low ⓘ |
| velocityDispersion | a few 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: Bootes I Dwarf Galaxy Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Bootes I Dwarf Galaxy