NGC 45
E591825
NGC 45 is a faint, low-surface-brightness spiral galaxy located relatively nearby in the constellation Cetus.
All labels observed (1)
| Label | Occurrences |
|---|---|
| NGC 45 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T6431311 — 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: NGC 45 Context triple: [Cetus, containsGalaxy, NGC 45]
-
A.
NGC 4501
NGC 4501 is a large, nearly face-on spiral galaxy notable for its active star formation and interaction with the intracluster medium in the Virgo Cluster.
-
B.
NGC 4571
NGC 4571 is a face-on spiral galaxy located in the constellation Coma Berenices and is a member of the Virgo Cluster of galaxies.
-
C.
NGC 4535
NGC 4535 is a large, face-on barred spiral galaxy notable for its well-defined spiral arms and location in the constellation Virgo.
-
D.
NGC 4579
NGC 4579 is a barred spiral galaxy with an active galactic nucleus located in the constellation Virgo and associated with the Virgo Cluster.
-
E.
NGC 4654
NGC 4654 is a spiral galaxy in the constellation Virgo that is a member of the Virgo Cluster and is noted for its asymmetric structure likely caused by gravitational interactions and ram-pressure effects.
- 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: NGC 45 Target entity description: NGC 45 is a faint, low-surface-brightness spiral galaxy located relatively nearby in the constellation Cetus.
-
A.
NGC 4501
NGC 4501 is a large, nearly face-on spiral galaxy notable for its active star formation and interaction with the intracluster medium in the Virgo Cluster.
-
B.
NGC 4571
NGC 4571 is a face-on spiral galaxy located in the constellation Coma Berenices and is a member of the Virgo Cluster of galaxies.
-
C.
NGC 4535
NGC 4535 is a large, face-on barred spiral galaxy notable for its well-defined spiral arms and location in the constellation Virgo.
-
D.
NGC 4579
NGC 4579 is a barred spiral galaxy with an active galactic nucleus located in the constellation Virgo and associated with the Virgo Cluster.
-
E.
NGC 4654
NGC 4654 is a spiral galaxy in the constellation Virgo that is a member of the Virgo Cluster and is noted for its asymmetric structure likely caused by gravitational interactions and ram-pressure effects.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
extragalactic object
ⓘ
low-surface-brightness galaxy ⓘ spiral galaxy ⓘ |
| absoluteMagnitudeV | about −18 ⓘ |
| angularSize | 8.5′ × 5.2′ ⓘ |
| apparentMagnitudeV | 10.4 ⓘ |
| belongsTo | nearby galaxy population ⓘ |
| bestSeenFrom | southern hemisphere ⓘ |
| bestViewingSeason | northern autumn ⓘ |
| catalog | New General Catalogue ⓘ |
| constellation | Cetus ⓘ |
| declination | −23° 10′ 55″ ⓘ |
| discoverer | John Herschel ⓘ |
| discoveryDate | 1835 ⓘ |
| distanceFromEarth |
6.5 Mpc
ⓘ
approximately 21 million light-years ⓘ |
| dustContent | modest ⓘ |
| environment | relatively isolated galaxy ⓘ |
| epoch | J2000 ⓘ |
| galaxyType | unbarred spiral galaxy ⓘ |
| gasContent | rich in neutral hydrogen ⓘ |
| groupMembership | outlying member of Sculptor Group ⓘ |
| hasNucleus | weak or ill-defined nucleus ⓘ |
| hasStellarPopulation |
dominantly young stars in spiral arms
ⓘ
older stars in disk ⓘ |
| hasStructure |
diffuse disk
ⓘ
patchy spiral arms ⓘ |
| inclination | low inclination to line of sight ⓘ |
| locatedIn |
Sculptor Group region
ⓘ
local volume ⓘ |
| mass | lower mass than Milky Way ⓘ |
| metallicity | sub-solar ⓘ |
| morphologicalType | SA(s)dm ⓘ |
| observedBy | Hubble Space Telescope ⓘ |
| observedIn |
optical wavelengths
ⓘ
radio wavelengths ⓘ |
| orientation | nearly face-on ⓘ |
| otherDesignation |
ESO 473- G 022
ⓘ
PGC 930 ⓘ |
| radialVelocity | 448 km/s ⓘ |
| redshift | 0.001494 ⓘ |
| rightAscension | 00h 14m 03s ⓘ |
| rotationCurve | indicates presence of dark matter ⓘ |
| starFormationRate | relatively low ⓘ |
| supermassiveBlackHoleEvidence | no strong evidence for luminous AGN ⓘ |
| surfaceBrightness | low ⓘ |
| visibility | faint but observable with medium amateur telescopes ⓘ |
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: NGC 45 Description of subject: NGC 45 is a faint, low-surface-brightness spiral galaxy located relatively nearby in the constellation Cetus.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.