Caldwell 57
E581398
Caldwell 57 is a dwarf irregular galaxy in the Local Group, better known as Barnard's Galaxy (NGC 6822), located in the constellation Sagittarius.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Caldwell 57 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T6290023 — 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: Caldwell 57 Context triple: [Barnard's Galaxy, alsoKnownAs, Caldwell 57]
-
A.
Caldwell 49
Caldwell 49 is a large, bright emission nebula and star-forming region in the constellation Monoceros, popularly known as the Rosette Nebula.
-
B.
Caldwell 14
Caldwell 14 is an open star cluster in the constellation Perseus, forming part of the famous Double Cluster visible to the naked eye in dark skies.
-
C.
Caldwell 106
Caldwell 106 is a bright, massive globular star cluster in the constellation Tucana, notable for its dense core and visibility to the naked eye under dark skies.
-
D.
Barnard 5
Barnard 5 is a dark molecular cloud and active star-forming region located within the Perseus molecular cloud complex.
-
E.
Caldwell 74
Caldwell 74 is a bright, well-known planetary nebula in the constellation Vela, popularly called the Southern Ring Nebula.
- 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: Caldwell 57 Target entity description: Caldwell 57 is a dwarf irregular galaxy in the Local Group, better known as Barnard's Galaxy (NGC 6822), located in the constellation Sagittarius.
-
A.
Caldwell 49
Caldwell 49 is a large, bright emission nebula and star-forming region in the constellation Monoceros, popularly known as the Rosette Nebula.
-
B.
Caldwell 14
Caldwell 14 is an open star cluster in the constellation Perseus, forming part of the famous Double Cluster visible to the naked eye in dark skies.
-
C.
Caldwell 106
Caldwell 106 is a bright, massive globular star cluster in the constellation Tucana, notable for its dense core and visibility to the naked eye under dark skies.
-
D.
Barnard 5
Barnard 5 is a dark molecular cloud and active star-forming region located within the Perseus molecular cloud complex.
-
E.
Caldwell 74
Caldwell 74 is a bright, well-known planetary nebula in the constellation Vela, popularly called the Southern Ring Nebula.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf | dwarf irregular galaxy ⓘ |
| alsoKnownAs |
Barnard's Galaxy
NERFINISHED
ⓘ
IC 4895 NERFINISHED ⓘ NGC 6822 NERFINISHED ⓘ |
| angularSize | 15.5 × 13.5 arcminutes ⓘ |
| apparentMagnitudeV | 9.3 ⓘ |
| catalog |
Caldwell catalogue
NERFINISHED
ⓘ
Index Catalogue ⓘ New General Catalogue NERFINISHED ⓘ |
| contains |
Cepheid variable stars
ⓘ
H II regions ⓘ planetary nebulae ⓘ young star clusters ⓘ |
| declination | −14° 48′ 12″ ⓘ |
| discoveredBy | Edward Emerson Barnard NERFINISHED ⓘ |
| discoveryYear | 1884 ⓘ |
| distanceFromEarth |
about 1.6 million light-years
ⓘ
about 500 kiloparsecs ⓘ |
| galacticLatitude | −18.4° ⓘ |
| galacticLongitude | 25.3° ⓘ |
| gasContent | rich in neutral hydrogen (H I) ⓘ |
| hasNotableRegion |
Hubble V
NERFINISHED
ⓘ
Hubble X NERFINISHED ⓘ |
| hasStarFormation | ongoing ⓘ |
| hasStellarPopulation |
Population I stars
NERFINISHED
ⓘ
Population II stars ⓘ |
| is | one of the nearest dwarf irregular galaxies outside the Milky Way ⓘ |
| locatedInConstellation | Sagittarius NERFINISHED ⓘ |
| mass | about 1×10^9 solar masses ⓘ |
| memberOf | Local Group NERFINISHED ⓘ |
| metallicity | low ⓘ |
| morphologicalType | IB(s)m ⓘ |
| namedAfter | Edward Emerson Barnard NERFINISHED ⓘ |
| observedWith |
Hubble Space Telescope
NERFINISHED
ⓘ
Very Large Telescope NERFINISHED ⓘ |
| orientation | seen nearly face-on ⓘ |
| radialVelocity | −57 km/s ⓘ |
| redshift | z = −0.000191 ⓘ |
| rightAscension | 19h 44m 57s ⓘ |
| surfaceBrightness | low ⓘ |
| usedFor | calibration of the cosmic distance scale ⓘ |
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: Caldwell 57 Description of subject: Caldwell 57 is a dwarf irregular galaxy in the Local Group, better known as Barnard's Galaxy (NGC 6822), located in the constellation Sagittarius.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.