The Double Cluster in Perseseus
The Double Cluster consists of the open clusters NGC 869 and NGC 884 which are close together in the constellation Perseus. Both visible with the naked eye at a distance of about 7,500 light years in the Perseus Arm of the Milky Way galaxy. Photo taken by James Foster with 10-inch f/4 Newtonian telescope
file: DoubleCluster-107min-RGBnewt10in-JRForigrbh-cr3asm.jpg
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Photographic Data
telescope:
Sky-Watcher Quattro 250P
(10-inch f/4 Newtonian telescope with coma corrector)
FL= 1,000 mm

mount:
iOptron Cem60
guiding off-axis

imaging camera:
ZWO ASI6200MM-Pro with red, green and blue filters

exposure:
107 minutes (1.78 hours)

.
photographic site:
James Foster observatory at Frazier Park California
(Bortle 4 at 5,500 ft elevstion)