JOHN CHUMACK / SCIENCE PHOTO LIBRARY JOHN CHUMACK / SCIENCE PHOTO LIBRARY
Collinder 399 (Coathanger Cluster), also known as Brocchis Cluster, is an open cluster of about 40 stars in Vulpecula with a visual magnitude of 3.6. 4 F6, 400 speed film, on July 4, 1996.
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