Sagittarius Dwarf Spheroidal Galaxy
E21424
The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
All labels observed (8)
How this entity was disambiguated
This entity first appeared as the object of triple T156308 — 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: Sagittarius Dwarf Spheroidal Galaxy Context triple: [Milky Way, hasSatellite, Sagittarius Dwarf Spheroidal Galaxy]
-
A.
Small Magellanic Cloud
The Small Magellanic Cloud is a nearby dwarf irregular galaxy visible from the Southern Hemisphere and one of the closest galactic neighbors to the Milky Way.
-
B.
Large Magellanic Cloud
The Large Magellanic Cloud is a nearby irregular dwarf galaxy visible from the Southern Hemisphere and notable for its role in studies of galaxy formation, stellar evolution, and the cosmic distance scale.
-
C.
Triangulum Galaxy
The Triangulum Galaxy is a nearby spiral galaxy in the Local Group, notable as one of the closest large galaxies to the Milky Way and a companion to the Andromeda Galaxy.
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D.
Andromeda Galaxy
The Andromeda Galaxy is the nearest large spiral galaxy to the Milky Way and is on a collision course to eventually merge with it.
-
E.
Milky Way
The Milky Way is the barred spiral galaxy that contains our Solar System and hundreds of billions of other stars.
- 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: Sagittarius Dwarf Spheroidal Galaxy Target entity description: The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
-
A.
Small Magellanic Cloud
The Small Magellanic Cloud is a nearby dwarf irregular galaxy visible from the Southern Hemisphere and one of the closest galactic neighbors to the Milky Way.
-
B.
Large Magellanic Cloud
The Large Magellanic Cloud is a nearby irregular dwarf galaxy visible from the Southern Hemisphere and notable for its role in studies of galaxy formation, stellar evolution, and the cosmic distance scale.
-
C.
Triangulum Galaxy
The Triangulum Galaxy is a nearby spiral galaxy in the Local Group, notable as one of the closest large galaxies to the Milky Way and a companion to the Andromeda Galaxy.
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D.
Andromeda Galaxy
The Andromeda Galaxy is the nearest large spiral galaxy to the Milky Way and is on a collision course to eventually merge with it.
-
E.
Milky Way
The Milky Way is the barred spiral galaxy that contains our Solar System and hundreds of billions of other stars.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf spheroidal galaxy
ⓘ
satellite galaxy ⓘ stellar stream progenitor ⓘ |
| alsoKnownAs |
SagDEG
ⓘ
Sagittarius Dwarf Elliptical Galaxy ⓘ
linked to:
Sagittarius Dwarf Spheroidal Galaxy
Sagittarius dSph ⓘ
linked to:
Sagittarius Dwarf Spheroidal Galaxy
|
| associatedGlobularCluster |
Arp 2
ⓘ
M54 ⓘ Terzan 7 ⓘ Terzan 8 ⓘ |
| belongsTo | Local Group ⓘ |
| contains |
globular clusters
ⓘ
metal-poor stars ⓘ old stellar population ⓘ |
| darkMatterDominated | true ⓘ |
| discoveredBy |
Geraint F. Lewis
ⓘ
Michael J. Irwin ⓘ Rodrigo Ibata ⓘ |
| discoveryMethod | star count overdensity in Milky Way halo ⓘ |
| discoveryYear | 1994 ⓘ |
| disruptionCause | Milky Way tidal forces ⓘ |
| distanceFromEarth_approx | 70000 light-years ⓘ |
| distanceFromGalacticCenter_approx | 16000–20000 light-years ⓘ |
| environment | Milky Way satellite system ⓘ |
| forms | Sagittarius Stream ⓘ |
| galacticComponent | Milky Way stellar halo ⓘ |
| hostGalaxy | Milky Way ⓘ |
| importanceInAstrophysics |
used to probe Milky Way dark matter halo
ⓘ
used to study galaxy accretion and tidal disruption ⓘ |
| interactionWithMilkyWay | currently being accreted by the Milky Way ⓘ |
| isSatelliteOf | Milky Way ⓘ |
| kinematics | shows tidal tails extending around the Milky Way ⓘ |
| locatedIn |
Sagittarius constellation
ⓘ
linked to:
Sagittarius
|
| luminosityClass | low-luminosity galaxy ⓘ |
| metallicity | low average metallicity compared to the Sun ⓘ |
| morphologicalType | dSph ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| orbitalPlane | nearly polar orbit around Milky Way ⓘ |
| orbitalStatus | being tidally disrupted by the Milky Way ⓘ |
| roleInGalaxyEvolution |
contributes globular clusters to Milky Way system
ⓘ
contributes stars to Milky Way halo ⓘ |
| shape | elongated ⓘ |
| starFormationActivity | little or no current star formation ⓘ |
| stellarMass_approx | 10^7 solar masses ⓘ |
| tidalDebris | stellar streams wrapping around the Milky Way ⓘ |
| visibility | obscured by Milky Way disk and bulge ⓘ |
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: Sagittarius Dwarf Spheroidal Galaxy Description of subject: The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
Referenced by (54)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
linked to: Sagittarius Dwarf Spheroidal Galaxy
Milky Way–Sagittarius dwarf interaction system
→
involvesGalaxy
→
Sagittarius Dwarf Spheroidal Galaxy
ⓘ
subject linked to:
globular cluster Arp 2
subject linked to:
globular cluster Arp 2
subject linked to:
globular cluster Arp 2
subject linked to:
globular cluster Arp 2
subject linked to:
globular cluster Whiting 1
subject linked to:
globular cluster Whiting 1
linked to: Sagittarius Dwarf Spheroidal Galaxy
subject linked to:
Ter 7
Sagittarius dwarf galaxy globular cluster system
→
associatedWith
→
Sagittarius Dwarf Spheroidal Galaxy
ⓘ
Sagittarius dwarf galaxy globular cluster system
→
gravitationallyBoundTo
→
Sagittarius Dwarf Spheroidal Galaxy
ⓘ
Sagittarius dwarf galaxy globular cluster system
→
hasOrigin
→
Sagittarius Dwarf Spheroidal Galaxy
ⓘ
subject linked to:
Local Group galaxies