On 19th January, 1711 the King’s Prussian Society of Scientists, at its first celebration gathering, turned over the responsibility for completed Berlin Astronomy Observatory.
Sebastian Koch was born on 19th January, 1691. François Vassard was born on 19th January, 1753 in Sainte-Agathe-d'Aliermont near Saint-Nicolas d'Aliermont. Augustin-Félix Lemercier was born on 19th January, 1804 in Saint-Nicolas d'Aliermont. Alexandre-Jean-Baptiste Grard was born on 19th January, 1805 in Saint-Nicolas d'Aliermont. Jacques-Hilaire Troude was born on 19th January, 1820 in Saint-Nicolas d'Aliermont. Alphonse-Edmond Laboulais was born on 19th January, 1832 in Neuville, Seine-Maritime. Antoine-Louis Baveux was born on 19th January, 1839 in Saint-Nicolas d'Aliermont. Louis-Auguste Huguenin-Dumittan was born on 19th January, 1873 in Le Locle. Antoinette-Léonie Aubin was born on 19th January, 1893 in Saint-Nicolas d'Aliermont.
Pierre Tollot died on 19th January, 1742 in Geneva. Noël Christian Théodore Joseph Sironval died on 19th January, 1859 in Paris. Achille Brocot died on 19th January, 1878 in Boissy-Saint-Léger, Val-de-Marne. Adolphe-Eugène Fihue died on 19th January, 1882 in Saint-Nicolas d'Aliermont. Ulysse Breting died on 19th January, 1891 in Le Locle.