15 April 1857 discovery of 43 Ariadne

15 April 1912 discovery of 731 Sorga and 732 Tjilaki

15 April 1980 discovery of 3041 Webb

15 April 1985 discovery of 4175 Billbaum

15 April 2002 discovery of 43669 Winterthur

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15 April 1718 Birth of Christian Horrebow in Copenhagen, Denmark

15 April 1764 Death of Peder Nielsen Horrebow in Copenhagen, Denmark

15 April 1765 Death of Mikhail Vasilyevich Lomonosov

15 April 1896 Birth of Nikolay Nikolayevich Semyonov

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Chronology