.
23 September
23 September 1846, discovery of Neptune
23 September 1913 discovery of 767 Bondia
23 September 1977 discovery of 5343 Ryzhov
23 September 1979 discovery of 2657 Bashkiria and 3013 Dobrovoleva
23 September 1990 discovery of 8088 Australia
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23 September 1819 Birth of Armand-Hippolyte-Louis Fizeau, in Paris, France
23 September 1915 Birth of Clifford Glenwood Shull
23 September 1929 Death of Richard Adolf Zsigmondy
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