Ferdinand Quénisset

Ferdinand Quénisset (1872 – 1951) was a French astronomer.

He worked as an observer at Camille Flammarion's private observatory at Juvisy-sur-Orge, France from 1906 to 1951 (he had also previously worked there in 1892–1893). A predecessor in this post had been the celebrated Eugène Antoniadi, who had returned to his native country in 1902 to get married (Antoniadi later returned to France in 1908 at the Meudon Observatory).

Quénisset made numerous drawings and photographs of Venus, Mars, Jupiter and the Moon. He co-discovered comet C/1893 N1 (Rordame-Quenisset) and discovered C/1911 S2 (Quenisset). In 1934, he was awarded the Valz Prize by the French Academy of Sciences for his observations of comets.