OB association
C16107
concept
An OB association is a loose, gravitationally unbound group of young, massive O- and B-type stars that formed together in the same region of a galaxy.
All labels observed (2)
| Label | Occurrences |
|---|---|
| OB association canonical | 11 |
| OB subgroup | 3 |
Description generation (CDg)
The one-sentence description above was generated by prompting gpt-5.1 with the class name and this instruction.
Instruction
generate a one-sentence description for a given conceptual class. # Response Format Return only the sentence: "Description: [one-sentence description of the conceptional class]"
Input
Class: OB association
Generated description
An OB association is a loose, gravitationally unbound group of young, massive O- and B-type stars that formed together in the same region of a galaxy.
Instances (14)
| Instance | Via concept surface |
|---|---|
| Perseus OB2 association | — |
| Scorpius–Centaurus OB association | — |
| Cassiopeia OB associations | — |
| Monoceros OB2 association | — |
| Orion OB association | — |
|
BD+30 540
surface form:
Perseus OB2 association
|
— |
| Vela OB2 association | — |
| Sagittarius OB association region | — |
| Cygnus OB2 association | — |
| Serpens OB1 association | — |
| Cepheus OB2 association | — |
| Upper Scorpius | OB subgroup |
| Lower Centaurus–Crux | OB subgroup |
| Upper Centaurus–Lupus | OB subgroup |