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Brocchi's Cluster .jpg

mariosi
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The Brocchi's Cluster, 
Collinder 399 (Cr 399) is a random grouping of stars located in the constellation Vulpecula near the border with Sagitta. Collinder 399 is known as Al Sufi's Cluster or Brocchi's Cluster. The brighter members of this star cluster form an asterism also known as the Coathanger.

It was first described by the Persian astronomer Al Sufi in his Book of Fixed Stars in 964.
In the 17th century, it was independently rediscovered by the Italian astronomer G. B. Hodierna.
In the 1920s, Dalmero Francis Brocchi, an amateur astronomer and chart maker for the American Association of Variable Star Observers (AAVSO), created a map of this object for use in calibrating photometers.
In 1931, Swedish astronomer Per Collinder listed it in his catalogue of open clusters (Wikipedia).

SCOPE: Celestron S.L.T. 130mm F.L 650/f5 
EYEPIECE: T/V 40mm plossl
DAY: Sunday DATE: 23/10/16  TIME: 21:30
LOCATION: Mammari

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