Sextans Dwarf Spheroidal Galaxy
E471077
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Sextans Dwarf Galaxy | 1 |
| Sextans Dwarf Spheroidal Galaxy canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4618726 — 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: Sextans Dwarf Spheroidal Galaxy Context triple: [Milky Way subgroup, hasMember, Sextans Dwarf Spheroidal Galaxy]
-
A.
Sagittarius Dwarf Spheroidal Galaxy
The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
-
B.
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.
-
C.
Canis Major Dwarf Galaxy
The Canis Major Dwarf Galaxy is a nearby, faint irregular dwarf galaxy thought to be the closest known satellite galaxy to the Milky Way and currently being tidally disrupted by it.
-
D.
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.
-
E.
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.
- 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: Sextans Dwarf Spheroidal Galaxy Target entity description: 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.
-
A.
Sagittarius Dwarf Spheroidal Galaxy
The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
-
B.
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.
-
C.
Canis Major Dwarf Galaxy
The Canis Major Dwarf Galaxy is a nearby, faint irregular dwarf galaxy thought to be the closest known satellite galaxy to the Milky Way and currently being tidally disrupted by it.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
dwarf spheroidal galaxy
ⓘ
galaxy ⓘ satellite galaxy of the Milky Way ⓘ |
| absoluteMagnitudeV | ~−9.5 ⓘ |
| alternativeName |
PGC 3097820
NERFINISHED
ⓘ
Sextans Dwarf NERFINISHED ⓘ Sextans I NERFINISHED ⓘ Sextans dSph NERFINISHED ⓘ |
| angularSize_deg | ~1.7×1.2 ⓘ |
| apparentMagnitudeV | ~10.4 ⓘ |
| belongsTo | Milky Way halo NERFINISHED ⓘ |
| containsVariableStars | RR Lyrae NERFINISHED ⓘ |
| containsYoungStars | no significant population ⓘ |
| darkMatterDominated | true ⓘ |
| declination | −01° 36′ ⓘ |
| discoveredBy |
Mike Irwin
NERFINISHED
ⓘ
collaborators of Mike Irwin ⓘ |
| discoveryMethod | photographic survey of the southern sky ⓘ |
| discoveryYear | 1990 ⓘ |
| distanceFromEarth_ly | ~320000 ⓘ |
| distanceFromMilkyWayCenter_ly | ~290000 ⓘ |
| distanceFromSun_ly | ~320000 ⓘ |
| dominantStellarPopulationAge_Gyr | >10 ⓘ |
| dominantStellarType | old, low-mass stars ⓘ |
| environment | outer halo of the Milky Way ⓘ |
| galaxyType | dSph ⓘ |
| gasContent | very low ⓘ |
| hostGalaxy | Milky Way NERFINISHED ⓘ |
| locatedInConstellation | Sextans NERFINISHED ⓘ |
| luminosity_solar | ~4×10^5 ⓘ |
| memberOf | Local Group NERFINISHED ⓘ |
| metallicity | low ⓘ |
| metallicity_Fe_H | ~−1.9 ⓘ |
| morphologicalType | dSph ⓘ |
| neutralHydrogenContent | undetected or extremely low ⓘ |
| notableProperty |
dominated by dark matter
ⓘ
extremely low surface brightness ⓘ very metal-poor stellar population ⓘ |
| orbitalStatus | bound satellite of the Milky Way ⓘ |
| radialVelocity_km_per_s | ~224 ⓘ |
| rightAscension | 10h 13m ⓘ |
| satelliteOf | Milky Way NERFINISHED ⓘ |
| starFormationActivity | quiescent ⓘ |
| stellarMass_solar | ~5×10^6 ⓘ |
| 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: Sextans Dwarf Spheroidal Galaxy Description of subject: 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.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Sextans Dwarf Galaxy