Upper Scorpius
E514325
Upper Scorpius is a nearby, young stellar subgroup rich in massive, hot stars and active star formation, located within the larger Scorpius–Centaurus OB association.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Upper Scorpius canonical | 2 |
| Upper Scorpius subgroup | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5362899 — 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: Upper Scorpius Context triple: [Scorpius–Centaurus OB association, containsStellarSubgroup, Upper Scorpius]
-
A.
Praesepe
Praesepe is a bright open star cluster in the constellation Cancer, also known as the Beehive Cluster, visible to the naked eye as a hazy patch in the night sky.
-
B.
Cygnus
Cygnus is a genus of large waterfowl commonly known as swans, recognized for their long necks, graceful appearance, and association with lakes and rivers across the Northern Hemisphere.
-
C.
Scorpius
Scorpius is a prominent zodiac constellation in the southern sky, easily recognized by its curved "scorpion's tail" and bright red supergiant star Antares.
-
D.
Centaurus
Centaurus is a prominent southern sky constellation known for containing the bright stars Alpha and Beta Centauri and the closest star system to the Sun, Proxima Centauri.
-
E.
Serpens Caput
Serpens Caput is the western half of the constellation Serpens, representing the serpent’s head in the northern sky.
- 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: Upper Scorpius Target entity description: Upper Scorpius is a nearby, young stellar subgroup rich in massive, hot stars and active star formation, located within the larger Scorpius–Centaurus OB association.
-
A.
Praesepe
Praesepe is a bright open star cluster in the constellation Cancer, also known as the Beehive Cluster, visible to the naked eye as a hazy patch in the night sky.
-
B.
Cygnus
Cygnus is a genus of large waterfowl commonly known as swans, recognized for their long necks, graceful appearance, and association with lakes and rivers across the Northern Hemisphere.
-
C.
Scorpius
Scorpius is a prominent zodiac constellation in the southern sky, easily recognized by its curved "scorpion's tail" and bright red supergiant star Antares.
-
D.
Centaurus
Centaurus is a prominent southern sky constellation known for containing the bright stars Alpha and Beta Centauri and the closest star system to the Sun, Proxima Centauri.
-
E.
Serpens Caput
Serpens Caput is the western half of the constellation Serpens, representing the serpent’s head in the northern sky.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
OB subgroup
ⓘ
star-forming region ⓘ stellar association subgroup ⓘ |
| contains |
massive OB stars that ionize surrounding gas
ⓘ
numerous X-ray active young stars ⓘ |
| hasAlternativeName |
USco
ⓘ
Upper Sco subgroup ⓘ |
| hasApproximateAge |
5–11 million years
ⓘ
~10 million years ⓘ |
| hasDistanceFromSun |
~140 parsecs
ⓘ
~450 light-years ⓘ |
| hasEnvironment |
relatively low extinction compared to embedded regions
ⓘ
remnant of a past giant molecular cloud ⓘ |
| hasKinematicProperty |
co-moving stellar group
ⓘ
common space motion of member stars ⓘ |
| hasMemberCount |
hundreds of confirmed stellar members
ⓘ
many candidate members identified by Gaia ⓘ |
| hasProperty |
active star formation
ⓘ
nearby to the Sun ⓘ rich in hot stars ⓘ young stellar population ⓘ |
| hasRoleIn |
nearby star-formation history studies
ⓘ
studies of circumstellar disks ⓘ studies of early stellar evolution ⓘ studies of planet formation timescales ⓘ |
| hasSignificance |
benchmark region for testing pre-main-sequence models
ⓘ
important for understanding recent local star formation ⓘ key region for studying disk dispersal ⓘ |
| hasStellarPopulation |
Herbig Ae/Be stars
ⓘ
OB stars ⓘ T Tauri stars ⓘ brown dwarfs ⓘ low-mass stars ⓘ massive stars ⓘ pre-main-sequence stars ⓘ |
| isAssociatedWith |
Lower Centaurus–Crux subgroup
ⓘ
linked to:
Lower Centaurus–Crux
Upper Centaurus–Lupus subgroup ⓘ |
| isLocatedIn |
Milky Way
ⓘ
constellation Scorpius ⓘ solar neighborhood ⓘ |
| isObservedIn |
X-ray wavelengths
ⓘ
infrared wavelengths ⓘ optical wavelengths ⓘ |
| isOneOf | three main Sco–Cen subgroups ⓘ |
| isSubgroupOf | Scorpius–Centaurus OB association ⓘ |
| partOf |
Scorpius–Centaurus OB association
ⓘ
Sco–Cen OB association ⓘ
linked to:
Scorpius–Centaurus OB association
|
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: Upper Scorpius Description of subject: Upper Scorpius is a nearby, young stellar subgroup rich in massive, hot stars and active star formation, located within the larger Scorpius–Centaurus OB association.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Upper Scorpius