Orion association

Orion association

(I Orionis) A large OB-association (see association) that contains over 1000 stars and lies in the region of the Orion nebula. There are at least three clusters in the association: the Lambda (λ) Orionis cluster, the Belt group around Epsilon (Ɛ) Orionis, and the Trapezium cluster.
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References in periodicals archive ?
In the opposite direction, on the Orion Arm (or "Spur"), we see the Orion Association, responsible for most of the Hunter's bright stars.
These are members of the Orion Association, hot young stars in the nebula-strewn edge of the Orion Arm of our galaxy -- the spiral arm in which we ourselves are located, though more toward its inner side.