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Alphonse Louis Nicolas Borrelly (December 8, 1842 – February 28, 1926) was a French astronomer born in Roquemaure, Gard.
He joined the Marseille Observatory in 1864. In the course of his career, he discovered a number of asteroids and comets, including the periodic comet 19P/Borrelly.
The French Academy of Sciences awarded him the Prix Valz for 1903[1] and the Prix Lalande for 1909.[2] The asteroid 1539 Borrelly was named in his honor.
In 1913, he received the Prix Jules Janssen, the highest award of the Société astronomique de France, the French astronomical society.