Perseus OB1 is an OB association in the Northern Celestial Hemisphere in the constellation Perseus.

It is centered around the double cluster (NGC 869 and NGC 884),[6] and has lent its name to the Perseus Arm of the Milky Way.

[8] The brightest member of the association is the blue supergiant 9 Persei.

[4] This star cluster–related article is a stub.

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