Leo I
E491704
Leo I is a faint dwarf spheroidal galaxy and satellite of the Milky Way located in the constellation Leo.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Leo I canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5075055 — 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 I Context triple: [Leo I Dwarf Galaxy, alternateName, Leo I]
-
A.
Leo I
Leo I was a 5th-century Eastern Roman emperor (reigned 457–474 AD) known for strengthening imperial independence from Germanic military influence and for commissioning the massive expedition against the Vandals.
-
B.
Justin I
Justin I was a Byzantine emperor who founded the Justinian dynasty and elevated his nephew Justinian I as his successor.
-
C.
Avitus
Avitus was a short-reigned 5th-century Western Roman emperor whose rule was marked by political instability and the empire’s accelerating decline.
-
D.
Glycerius
Glycerius was a late Western Roman emperor who briefly ruled in the mid-5th century during the empire’s final years of decline.
-
E.
Justin II
Justin II was a 6th-century Byzantine emperor who ruled from 565 to 578 CE, known for his attempts to continue Justinian I’s policies but facing significant military setbacks and internal instability.
- 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 I Target entity description: Leo I is a faint dwarf spheroidal galaxy and satellite of the Milky Way located in the constellation Leo.
-
A.
Leo I
Leo I was a 5th-century Eastern Roman emperor (reigned 457–474 AD) known for strengthening imperial independence from Germanic military influence and for commissioning the massive expedition against the Vandals.
-
B.
Justin I
Justin I was a Byzantine emperor who founded the Justinian dynasty and elevated his nephew Justinian I as his successor.
-
C.
Avitus
Avitus was a short-reigned 5th-century Western Roman emperor whose rule was marked by political instability and the empire’s accelerating decline.
-
D.
Glycerius
Glycerius was a late Western Roman emperor who briefly ruled in the mid-5th century during the empire’s final years of decline.
-
E.
Justin II
Justin II was a 6th-century Byzantine emperor who ruled from 565 to 578 CE, known for his attempts to continue Justinian I’s policies but facing significant military setbacks and internal instability.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | dwarf spheroidal galaxy ⓘ |
| absoluteMagnitudeV | ~−12 ⓘ |
| alternativeName |
Leo Dwarf Spheroidal
NERFINISHED
ⓘ
Leo I Dwarf Galaxy NERFINISHED ⓘ |
| angularSize_arcmin | ~12×10 ⓘ |
| apparentMagnitudeV | ~11.2 ⓘ |
| belongsTo | Milky Way halo NERFINISHED ⓘ |
| catalogDesignation |
DDO 74
NERFINISHED
ⓘ
Leo Dwarf NERFINISHED ⓘ PGC 34176 NERFINISHED ⓘ UGC 5470 NERFINISHED ⓘ |
| contains |
horizontal branch stars
ⓘ
old red giant branch stars ⓘ |
| coordinateSystem | equatorial ⓘ |
| darkMatterDominated | true ⓘ |
| declination | +12° 18′ ⓘ |
| discoveredBy | Albert George Wilson NERFINISHED ⓘ |
| discoveryMethod | photographic survey ⓘ |
| discoverySite | Palomar Observatory NERFINISHED ⓘ |
| discoveryYear | 1950 ⓘ |
| distanceFromEarth_kpc | ~250 ⓘ |
| distanceFromEarth_ly | ~820000 ⓘ |
| galacticEnvironment | outer halo of the Milky Way ⓘ |
| galacticLatitude | high ⓘ |
| galaxyType | dwarf spheroidal ⓘ |
| gasContent | very low ⓘ |
| hasNucleus | no distinct nucleus ⓘ |
| interactionWithMilkyWay | tidal effects likely ⓘ |
| lastMajorStarFormationEpoch | ~1–2 billion years ago ⓘ |
| locatedInConstellation | Leo NERFINISHED ⓘ |
| mass_solarMasses | ~2×10^7 ⓘ |
| memberOf | Local Group NERFINISHED ⓘ |
| metallicity | low ⓘ |
| namedAfter | constellation Leo ⓘ |
| observableFromHemisphere | Northern Hemisphere NERFINISHED ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| radialVelocity_kmPerSec | ~285 ⓘ |
| redshift_z | ~0.00095 ⓘ |
| rightAscension | 10h 08m ⓘ |
| satelliteOf | Milky Way NERFINISHED ⓘ |
| shape | spheroidal ⓘ |
| starFormationActivity | quiescent ⓘ |
| stellarPopulation | old stars dominant ⓘ |
| surfaceBrightness | very low ⓘ |
| visibility | requires telescope ⓘ |
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 I Description of subject: Leo I is a faint dwarf spheroidal galaxy and satellite of the Milky Way located in the constellation Leo.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.