PGC 2557
E463798
PGC 2557 is a nearby irregular dwarf galaxy in the Local Group, notable for its intense star formation and heavy obscuration by interstellar dust in the Milky Way’s plane.
All labels observed (1)
| Label | Occurrences |
|---|---|
| PGC 2557 canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T4618577 — 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: PGC 2557 Context triple: [IC 10, otherDesignation, PGC 2557]
-
A.
PGC 2121
PGC 2121 is a faint, gas-rich dwarf irregular galaxy located in the outskirts of the Andromeda Galaxy’s local group region.
-
B.
PGC 3085
PGC 3085 is a dwarf irregular galaxy better known as the Small Magellanic Cloud, a nearby satellite of the Milky Way visible from the Southern Hemisphere.
-
C.
PGC 63616
PGC 63616 is a barred irregular dwarf galaxy in the Local Group, notable for its proximity to the Milky Way and active star-forming regions.
-
D.
NGC 205
NGC 205 is a dwarf elliptical satellite galaxy of the Andromeda Galaxy, notable for its proximity to the Local Group’s largest spiral and its mixed old and young stellar populations.
-
E.
NGC 2246
NGC 2246 is a catalog designation for a bright emission region within the Rosette Nebula, a large star-forming complex in the constellation Monoceros.
- 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: PGC 2557 Target entity description: PGC 2557 is a nearby irregular dwarf galaxy in the Local Group, notable for its intense star formation and heavy obscuration by interstellar dust in the Milky Way’s plane.
-
A.
PGC 2121
PGC 2121 is a faint, gas-rich dwarf irregular galaxy located in the outskirts of the Andromeda Galaxy’s local group region.
-
B.
PGC 3085
PGC 3085 is a dwarf irregular galaxy better known as the Small Magellanic Cloud, a nearby satellite of the Milky Way visible from the Southern Hemisphere.
-
C.
PGC 63616
PGC 63616 is a barred irregular dwarf galaxy in the Local Group, notable for its proximity to the Milky Way and active star-forming regions.
-
D.
NGC 205
NGC 205 is a dwarf elliptical satellite galaxy of the Andromeda Galaxy, notable for its proximity to the Local Group’s largest spiral and its mixed old and young stellar populations.
-
E.
NGC 2246
NGC 2246 is a catalog designation for a bright emission region within the Rosette Nebula, a large star-forming complex in the constellation Monoceros.
- F. None of above. chosen
Statements (31)
| Predicate | Object |
|---|---|
| instanceOf |
Local Group galaxy
ⓘ
dwarf galaxy ⓘ galaxy ⓘ irregular galaxy ⓘ |
| affectedBy | Galactic extinction ⓘ |
| catalogCode | PGC 2557 ⓘ |
| distanceCategory | nearby extragalactic object ⓘ |
| hasDarkMatterContent | dark-matter dominated ⓘ |
| hasDustObscuration | high ⓘ |
| hasEnvironment | near the Milky Way ⓘ |
| hasGalaxyType | dwarf irregular ⓘ |
| hasGasContent | gas-rich ⓘ |
| hasMetallicity | low to moderate ⓘ |
| hasMorphologicalType | irregular ⓘ |
| hasProperty |
heavily obscured by interstellar dust
ⓘ
nearby galaxy ⓘ |
| hasSizeClass | dwarf ⓘ |
| hasStarFormationActivity | intense star formation ⓘ |
| hasStarFormationRate | elevated ⓘ |
| hasStellarPopulation |
massive stars
ⓘ
young stars ⓘ |
| hasStructure | irregular morphology ⓘ |
| liesIn | plane of the Milky Way ⓘ |
| locatedIn |
Local Group
ⓘ
Milky Way zone of avoidance ⓘ
linked to:
Zone of Avoidance of the Milky Way
|
| memberOf | Local Group ⓘ |
| obscuredBy | interstellar dust ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| partOfCatalog | Principal Galaxies Catalogue ⓘ |
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: PGC 2557 Description of subject: PGC 2557 is a nearby irregular dwarf galaxy in the Local Group, notable for its intense star formation and heavy obscuration by interstellar dust in the Milky Way’s plane.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.