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William Herschel
William and Caroline Herschel catalogued 2,467 DSO from London between 1782 and 1802. William discovered an amazing 2,444 of these!
His best years were 1784 to 1790. He catalogued 639 objects in one year, 1784, and 178 in one month, April 1785.
March (500 DSO in 20 years) and April (622 DSO in 20 years) were the most productive months.
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