Brocchi's Cluster

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What Wikipedia says

Brocchi's Cluster (also known as Collinder 399, Cr 399 or Al Sufi's Cluster) is an asterism of ten stars. Six of the stars appear in a row, across 1.3° of the night sky. The cluster is in the south of the constellation Vulpecula, near the border with Sagitta. Its nickname is the Coathanger.

Excerpt from the Wikipedia article “Brocchi's Cluster”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Petr Novák (http://astrofotky.cz/~karneades), CC BY-SA 4.0, via Wikimedia Commons.