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Well worth the effort. A ripper of a cluster. The star colours are lovely.
Minor: the background seems a bit mottled. That could be due to severe light pollution and ageing flats. Given that there's no nebulosity, you could probably just pull a slider in photoshop and make the background go away.
Four billion years seems utterly antique for an open cluster. Getting up towards globular cluster territory. Open clusters normally fall apart after just a few million years.
Best,
MnT
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