IC 1613
E103068
IC 1613 is a dwarf irregular galaxy in the constellation Cetus and a member of the Local Group, notable for its low dust content and use in calibrating the cosmic distance scale.
All labels observed (1)
| Label | Occurrences |
|---|---|
| IC 1613 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T869142 — 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: IC 1613 Context triple: [Local Group, contains, IC 1613]
-
A.
IC 10
IC 10 is a nearby irregular starburst galaxy notable for its intense star formation and membership in the Local Group.
-
B.
NGC 6822
NGC 6822 is a barred irregular dwarf galaxy located in the constellation Sagittarius and is one of the nearest and best-studied galaxies outside the Milky Way.
-
C.
NGC 1432
NGC 1432 is a reflection nebula in the constellation Taurus that is part of the Pleiades (Seven Sisters) star cluster.
-
D.
globular star cluster M13
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
-
E.
Stephan's Quintet
Stephan's Quintet is a visually striking compact group of five galaxies in the constellation Pegasus, famous for their complex gravitational interactions and dramatic appearance in astronomical imagery.
- 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: IC 1613 Target entity description: IC 1613 is a dwarf irregular galaxy in the constellation Cetus and a member of the Local Group, notable for its low dust content and use in calibrating the cosmic distance scale.
-
A.
IC 10
IC 10 is a nearby irregular starburst galaxy notable for its intense star formation and membership in the Local Group.
-
B.
NGC 6822
NGC 6822 is a barred irregular dwarf galaxy located in the constellation Sagittarius and is one of the nearest and best-studied galaxies outside the Milky Way.
-
C.
NGC 1432
NGC 1432 is a reflection nebula in the constellation Taurus that is part of the Pleiades (Seven Sisters) star cluster.
-
D.
globular star cluster M13
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
-
E.
Stephan's Quintet
Stephan's Quintet is a visually striking compact group of five galaxies in the constellation Pegasus, famous for their complex gravitational interactions and dramatic appearance in astronomical imagery.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Local Group member
ⓘ
dwarf irregular galaxy ⓘ galaxy ⓘ |
| absoluteMagnitudeV | about −15.3 ⓘ |
| apparentMagnitudeV | 9.9 ⓘ |
| apparentSize | 16.2 × 14.5 arcminutes ⓘ |
| catalogDesignation |
IC 1613
self-link
ⓘ
PGC 1384 ⓘ UGC 668 ⓘ |
| constellation | Cetus ⓘ |
| contains |
Cepheid variable stars
ⓘ
H II regions ⓘ RR Lyrae variable stars ⓘ old stellar populations ⓘ young stellar populations ⓘ |
| declination | −02° 07′ 04″ ⓘ |
| discoveredBy | Max Wolf ⓘ |
| discoveryYear | 1906 ⓘ |
| distanceFromEarth |
about 224 kiloparsecs
ⓘ
about 730000 light-years ⓘ |
| distanceIndicatorRole | primary distance calibrator ⓘ |
| dustContent | low ⓘ |
| environment | relatively isolated within Local Group ⓘ |
| foregroundExtinction | low ⓘ |
| galaxyType | dIrr ⓘ |
| gasContent | rich in neutral hydrogen ⓘ |
| hasProperty |
low internal reddening
ⓘ
well-resolved into individual stars ⓘ |
| heliocentricVelocity | about −234 km/s ⓘ |
| inclination | low inclination to line of sight ⓘ |
| locatedIn | Local Group outskirts ⓘ |
| memberOf | Local Group ⓘ |
| metallicity | low ⓘ |
| morphologicalType | IB(s)m ⓘ |
| nearbyTo |
Andromeda Galaxy
ⓘ
Milky Way ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| radialVelocity | −234 km/s ⓘ |
| redshift | −0.000527 ⓘ |
| rightAscension | 01h 04m 47s ⓘ |
| starFormationActivity | ongoing ⓘ |
| stellarPopulation | metal-poor ⓘ |
| surfaceBrightness | low ⓘ |
| usedFor |
Cepheid period–luminosity relation calibration
ⓘ
calibrating 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: IC 1613 Description of subject: IC 1613 is a dwarf irregular galaxy in the constellation Cetus and a member of the Local Group, notable for its low dust content and use in calibrating the cosmic distance scale.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.