NGC 5408
E480178
NGC 5408 is a dwarf irregular galaxy notable for hosting an ultraluminous X-ray source and active star formation, located in the nearby Centaurus A/M83 galaxy group.
All labels observed (1)
| Label | Occurrences |
|---|---|
| NGC 5408 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4835297 — 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 5408 Context triple: [Centaurus A/M83 Group, containsGalaxy, NGC 5408]
-
A.
NGC 4945
NGC 4945 is a nearby, edge-on barred spiral galaxy in the constellation Centaurus, notable for its active galactic nucleus and intense star-forming activity.
-
B.
NGC 2403
NGC 2403 is a nearby spiral galaxy in the constellation Camelopardalis, notable for its active star formation and numerous observed supernovae.
-
C.
NGC 5253
NGC 5253 is a nearby blue compact dwarf galaxy in the constellation Centaurus, notable for its intense starburst activity and young massive star clusters.
-
D.
NGC 5128
NGC 5128, also known as Centaurus A, is a nearby peculiar elliptical galaxy with a prominent dust lane and one of the strongest radio sources in the sky.
-
E.
NGC 2976
NGC 2976 is a nearby dwarf spiral galaxy in the constellation Ursa Major and a member of the M81 Group of galaxies.
- 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 5408 Target entity description: NGC 5408 is a dwarf irregular galaxy notable for hosting an ultraluminous X-ray source and active star formation, located in the nearby Centaurus A/M83 galaxy group.
-
A.
NGC 4945
NGC 4945 is a nearby, edge-on barred spiral galaxy in the constellation Centaurus, notable for its active galactic nucleus and intense star-forming activity.
-
B.
NGC 2403
NGC 2403 is a nearby spiral galaxy in the constellation Camelopardalis, notable for its active star formation and numerous observed supernovae.
-
C.
NGC 5253
NGC 5253 is a nearby blue compact dwarf galaxy in the constellation Centaurus, notable for its intense starburst activity and young massive star clusters.
-
D.
NGC 5128
NGC 5128, also known as Centaurus A, is a nearby peculiar elliptical galaxy with a prominent dust lane and one of the strongest radio sources in the sky.
-
E.
NGC 2976
NGC 2976 is a nearby dwarf spiral galaxy in the constellation Ursa Major and a member of the M81 Group of galaxies.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
dwarf irregular galaxy ⓘ galaxy ⓘ |
| cataloguedIn |
ESO catalogue
NERFINISHED
ⓘ
NGC NERFINISHED ⓘ PGC NERFINISHED ⓘ |
| discoveredBy | John Herschel NERFINISHED ⓘ |
| discoveryYear | 1834 ⓘ |
| hasAlternateName |
ESO 272-25
NERFINISHED
ⓘ
HIPASS J1403-41 NERFINISHED ⓘ IRAS 13599-4102 NERFINISHED ⓘ PGC 50033 NERFINISHED ⓘ |
| hasAngularSize | 1.6′ × 1.0′ ⓘ |
| hasApparentMagnitudeV | 11.5 ⓘ |
| hasColor | blue ⓘ |
| hasConstellation | Centaurus NERFINISHED ⓘ |
| hasDeclination | −41° 22′ ⓘ |
| hasDiscoveryCatalog | New General Catalogue NERFINISHED ⓘ |
| hasDistance |
~15.7 million light-years
ⓘ
~4.8 Mpc ⓘ |
| hasDustContent | moderate dust ⓘ |
| hasEnvironment | group galaxy ⓘ |
| hasGalaxyType | Magellanic-type irregular ⓘ |
| hasGasContent | gas-rich ⓘ |
| hasLuminosityClass | low-luminosity galaxy ⓘ |
| hasMetallicity | low metallicity ⓘ |
| hasMorphologicalType | IB(s)m ⓘ |
| hasNeutralHydrogen | extended H I envelope ⓘ |
| hasNotableFeature | ultraluminous X-ray source ⓘ |
| hasRadialVelocity | 579 km/s ⓘ |
| hasRedshift | 0.00193 ⓘ |
| hasRightAscension | 14h 03m 20s ⓘ |
| hasSpectralFeature | strong emission lines ⓘ |
| hasStarFormationActivity | active ⓘ |
| hasStarFormationHistory | recent starburst episodes ⓘ |
| hasStarFormationRegion | H II regions NERFINISHED ⓘ |
| hasStellarPopulation |
older underlying population
ⓘ
young massive stars ⓘ |
| hasXRaySourceType | ultraluminous X-ray source ⓘ |
| hosts | NGC 5408 X-1 NERFINISHED ⓘ |
| isNearbyTo |
M83
NERFINISHED
ⓘ
NGC 5253 NERFINISHED ⓘ |
| locatedIn |
local universe
ⓘ
southern celestial hemisphere ⓘ |
| memberOf |
Centaurus A Group
NERFINISHED
ⓘ
Centaurus A/M83 Group NERFINISHED ⓘ |
| observedBy |
Chandra X-ray Observatory
NERFINISHED
ⓘ
Hubble Space Telescope NERFINISHED ⓘ XMM-Newton NERFINISHED ⓘ |
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 5408 Description of subject: NGC 5408 is a dwarf irregular galaxy notable for hosting an ultraluminous X-ray source and active star formation, located in the nearby Centaurus A/M83 galaxy group.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.