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sabato 30 agosto 2008

Wild Duck Cluster

Ecco una foto della Wild Duck Cluster del 29/08/2008 alle 23.00. Foto realizzata con una Pentax K100D al fuoco diretto di un Celestron Nexstar 4SE. Esposizione di 30'' ISO 1600.
"The Wild Duck Cluster (also known as Messier 11, or NGC 6705) is an open cluster in the constellation Scutum. It was discovered by Gottfried Kirch in 1681. Charles Messier included it in his catalogue in 1764.
The Wild Duck Cluster is one of the richest and most compact of the known open clusters, containing about 2900 stars
. Its age has been estimated to about 220 million years. Its name derives from the brighter stars forming a triangle which could represent a flying flock of ducks." (Wikipedia)

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