Leo II Dwarf Galaxy
E115651
astronomical object
dwarf spheroidal galaxy
galaxy in the Local Group
satellite galaxy of the Milky Way
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Leo II Dwarf Galaxy canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T869145 — 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: Leo II Dwarf Galaxy Context triple: [Local Group, contains, Leo II Dwarf Galaxy]
-
A.
Leo I Dwarf Galaxy
Leo I Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the constellation Leo and belonging to the Local Group of galaxies.
-
B.
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.
-
C.
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.
-
D.
Andromeda X
Andromeda X is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy within the Local Group.
-
E.
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.
- 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: Leo II Dwarf Galaxy Target entity description: 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.
-
A.
Leo I Dwarf Galaxy
Leo I Dwarf Galaxy is a faint, spheroidal satellite galaxy of the Milky Way located in the constellation Leo and belonging to the Local Group of galaxies.
-
B.
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.
-
C.
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.
-
D.
Andromeda X
Andromeda X is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy within the Local Group.
-
E.
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.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
dwarf spheroidal galaxy ⓘ galaxy in the Local Group ⓘ satellite galaxy of the Milky Way ⓘ |
| absoluteMagnitudeV | about −9.8 ⓘ |
| angularSize | about 12 arcminutes ⓘ |
| apparentMagnitudeV | about 12.6 ⓘ |
| belongsTo |
Milky Way stellar halo
ⓘ
surface form:
Milky Way halo
|
| catalog |
PGC
ⓘ
UGC ⓘ |
| contains |
horizontal branch stars
ⓘ
old red giant branch stars ⓘ |
| coordinateSystem | equatorial ⓘ |
| darkMatterContent | dark-matter-dominated galaxy ⓘ |
| declination | +22° 09′ ⓘ |
| discoveredBy |
Albert George Wilson
ⓘ
Robert G. Harrington NERFINISHED ⓘ |
| discoveryYear | 1950 ⓘ |
| distanceFromEarth |
about 210 kiloparsecs
ⓘ
about 690000 light-years ⓘ |
| distanceFromMilkyWayCenter | about 230 kiloparsecs ⓘ |
| environment | outer halo of the Milky Way ⓘ |
| galacticLatitude | +67 degrees (approximate) ⓘ |
| galacticLongitude | 220 degrees (approximate) ⓘ |
| gasContent | very low neutral gas content ⓘ |
| hostGalaxyType | satellite of a barred spiral galaxy (Milky Way) ⓘ |
| locatedInConstellation | Leo ⓘ |
| massToLightRatio | high mass-to-light ratio ⓘ |
| memberOf | Local Group ⓘ |
| metallicity | low metallicity ⓘ |
| morphologicalType | dSph (dwarf spheroidal) ⓘ |
| notableFor | being one of the classical Milky Way dwarf spheroidal satellites ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| orbitalStatus | bound satellite of the Milky Way ⓘ |
| otherName |
Leo B
ⓘ
Leo II ⓘ PGC 29488 ⓘ
surface form:
PGC 34176
UGC 6253 ⓘ |
| radialVelocity | about +79 km/s ⓘ |
| redshift | about 0.00026 ⓘ |
| rightAscension | 11h 13m ⓘ |
| satelliteOf | Milky Way ⓘ |
| starFormationActivity | no current significant star formation ⓘ |
| stellarPopulation | dominated by old stars ⓘ |
| surfaceBrightness | very low surface brightness ⓘ |
| visibleFrom |
Northern Celestial Hemisphere
ⓘ
surface form:
Northern Hemisphere
|
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: Leo II Dwarf Galaxy Description of subject: 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.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.