Northern Berkshire Astronomical Society

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NGC 2243

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Old Open Clusters: Galactic Survivors

CALDWELL: 1
MESSIER: 67
NGC: 188, 2243, 6791
OTHER: Berkeley 17, Berkeley 32, King 2
By NBAS | Jul 9, 2026

Open clusters are typically younger than 1-2 billion years, but a few are much older.