Holmberg IX
E450572
Holmberg IX is a small irregular dwarf galaxy and one of the nearest known satellite galaxies of the spiral galaxy Messier 81 (M81).
All labels observed (1)
| Label | Occurrences |
|---|---|
| Holmberg IX canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4531648 — 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: Holmberg IX Context triple: [M81 Group, containsGalaxy, Holmberg IX]
-
A.
Andromeda IX
Andromeda IX is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
B.
Andromeda XV
Andromeda XV is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
C.
Andromeda XI
Andromeda XI is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
D.
Terzan 7
Terzan 7 is a relatively young, metal-rich globular cluster located in the constellation Sagittarius and dynamically associated with the Sagittarius Dwarf Spheroidal Galaxy.
-
E.
Cetus Dwarf Galaxy
The Cetus Dwarf Galaxy is a faint, spheroidal dwarf galaxy located in the constellation Cetus and is one of the small satellite members of our cosmic neighborhood.
- 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: Holmberg IX Target entity description: Holmberg IX is a small irregular dwarf galaxy and one of the nearest known satellite galaxies of the spiral galaxy Messier 81 (M81).
-
A.
Andromeda IX
Andromeda IX is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
B.
Andromeda XV
Andromeda XV is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
C.
Andromeda XI
Andromeda XI is a faint dwarf spheroidal satellite galaxy of the Andromeda Galaxy located within the Local Group.
-
D.
Terzan 7
Terzan 7 is a relatively young, metal-rich globular cluster located in the constellation Sagittarius and dynamically associated with the Sagittarius Dwarf Spheroidal Galaxy.
-
E.
Cetus Dwarf Galaxy
The Cetus Dwarf Galaxy is a faint, spheroidal dwarf galaxy located in the constellation Cetus and is one of the small satellite members of our cosmic neighborhood.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
galaxy ⓘ irregular dwarf galaxy ⓘ satellite galaxy ⓘ |
| apparentMagnitudeV | approximately 16.5 ⓘ |
| associatedWith |
tidal interactions between M81 and M82
ⓘ
tidal interactions between M81 and NGC 3077 ⓘ |
| belongsTo | nearby galaxies catalogues ⓘ |
| contains |
H II regions
ⓘ
massive stars ⓘ neutral hydrogen gas ⓘ young stellar populations ⓘ |
| declination | +69° 02′ (approximate) ⓘ |
| discoveredBy | Erik Holmberg ⓘ |
| distanceFromEarth |
approximately 1.1 megaparsecs
ⓘ
approximately 3.6 million light-years ⓘ |
| environment | interacting galaxy system around M81 ⓘ |
| epoch | J2000 ⓘ |
| galaxyType | dwarf irregular galaxy ⓘ |
| hasAlternativeName |
DDO 66
ⓘ
KDG 61 (sometimes associated) ⓘ UGC 5336 ⓘ |
| hasStarClusterPopulation | yes ⓘ |
| hasStarFormation | yes ⓘ |
| isGasRich | yes ⓘ |
| isGravitationallyBoundTo | Messier 81 ⓘ |
| isNearbyTo |
Messier 82
ⓘ
NGC 3077 ⓘ |
| isOneOf | nearest known satellite galaxies of Messier 81 ⓘ |
| likelyOrigin | tidal dwarf galaxy candidate ⓘ |
| locatedIn |
constellation Ursa Major
ⓘ
local volume of the Universe ⓘ |
| memberOf | M81 Group ⓘ |
| metallicity | low metallicity galaxy ⓘ |
| morphologicalType | Im ⓘ |
| namedAfter | Erik Holmberg ⓘ |
| observedBy |
Hubble Space Telescope
ⓘ
Very Large Array ⓘ |
| observedIn |
optical wavelengths
ⓘ
radio wavelengths ⓘ ultraviolet wavelengths ⓘ |
| partOf | M81 Group ⓘ |
| radialVelocity | approximately 46 kilometers per second ⓘ |
| redshift | approximately 0.000158 ⓘ |
| rightAscension | 09h 57m (approximate) ⓘ |
| satelliteOf | Messier 81 ⓘ |
| stellarPopulationAge | predominantly young ⓘ |
| surfaceBrightness | low surface brightness galaxy ⓘ |
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: Holmberg IX Description of subject: Holmberg IX is a small irregular dwarf galaxy and one of the nearest known satellite galaxies of the spiral galaxy Messier 81 (M81).
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.