Orphan stream
E502433
The Orphan stream is a narrow, elongated stream of stars in the Milky Way’s halo, believed to be the remnants of a disrupted dwarf galaxy or globular cluster.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Orphan stream canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5202254 — 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: Orphan stream Context triple: [Milky Way stellar halo, hasSubstructure, Orphan stream]
-
A.
Orphan
Orphan is a musical act associated with the experimental rock band Dope Body, likely sharing members or stylistic influences within the noise rock and punk scenes.
-
B.
ORC
ORC is the abbreviation for the Organized Reserve Corps, a former component of the United States Army Reserve structure.
-
C.
ORC
ORC (Optimized Row Columnar) is a highly efficient, columnar storage file format commonly used in big data systems to enable fast analytics and compression.
-
D.
Orphan 55
Orphan 55 is a "Doctor Who" television episode from the twelfth series, featuring the Thirteenth Doctor and her companions on a perilous visit to a seemingly idyllic holiday resort hiding a dark secret.
-
E.
Sky Stream
Sky Stream is a streaming television service from Sky that delivers live TV and on-demand content over broadband without the need for a satellite dish.
- 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: Orphan stream Target entity description: The Orphan stream is a narrow, elongated stream of stars in the Milky Way’s halo, believed to be the remnants of a disrupted dwarf galaxy or globular cluster.
-
A.
Orphan
Orphan is a musical act associated with the experimental rock band Dope Body, likely sharing members or stylistic influences within the noise rock and punk scenes.
-
B.
ORC
ORC is the abbreviation for the Organized Reserve Corps, a former component of the United States Army Reserve structure.
-
C.
ORC
ORC (Optimized Row Columnar) is a highly efficient, columnar storage file format commonly used in big data systems to enable fast analytics and compression.
-
D.
Orphan 55
Orphan 55 is a "Doctor Who" television episode from the twelfth series, featuring the Thirteenth Doctor and her companions on a perilous visit to a seemingly idyllic holiday resort hiding a dark secret.
-
E.
Sky Stream
Sky Stream is a streaming television service from Sky that delivers live TV and on-demand content over broadband without the need for a satellite dish.
- F. None of above. chosen
Statements (32)
| Predicate | Object |
|---|---|
| instanceOf |
Milky Way halo substructure
ⓘ
astronomical structure ⓘ stellar stream ⓘ |
| associatedWith | possible progenitor dwarf galaxy in Ursa Major region ⓘ |
| composedOf | stars ⓘ |
| discoveredBy |
N. W. Evans
ⓘ
Sloan Digital Sky Survey ⓘ Vasily Belokurov ⓘ |
| discoveredIn | 2006 ⓘ |
| extendsAcross | northern Galactic hemisphere ⓘ |
| hasAlternativeName | Orphan stellar stream ⓘ |
| hasApproximateDistanceFromSun | 20–50 kiloparsecs ⓘ |
| hasApproximateLength | ~60 degrees on the sky ⓘ |
| hasKinematics | prograde orbit around Milky Way ⓘ |
| hasMetallicity |
[Fe/H] ≈ −1.5 to −2.0
ⓘ
metal-poor ⓘ |
| hasNotableProperty |
coherent proper motions in Gaia data
ⓘ
large spatial extent ⓘ low surface brightness ⓘ |
| hasProgenitorStatus | progenitor not definitively identified ⓘ |
| hasShape |
elongated
ⓘ
narrow ⓘ |
| locatedIn |
Milky Way galaxy
ⓘ
linked to:
Milky Way
Milky Way halo ⓘ
linked to:
Milky Way stellar halo
|
| observedBy |
Gaia space observatory
ⓘ
linked to:
Gaia observatory
Pan-STARRS ⓘ
linked to:
Pan-STARRS survey
Sloan Digital Sky Survey ⓘ |
| partOf | Galactic stellar halo ⓘ |
| possibleOrigin |
disrupted dwarf galaxy
ⓘ
disrupted globular cluster ⓘ |
| usedFor |
studying tidal disruption of satellites
ⓘ
tracing Milky Way dark matter halo potential ⓘ |
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: Orphan stream Description of subject: The Orphan stream is a narrow, elongated stream of stars in the Milky Way’s halo, believed to be the remnants of a disrupted dwarf galaxy or globular cluster.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.