Comet 2P/Encke was named after Johannes Encke who, in 1821, calculated its orbit on the basis of previous measurements made by Pons in 1818. He predicted its return in 1821 with an accuracy of 1 day. In 1823, he identified that comet Encke had already appeared in 1786, 1795, and 1805. Comet Encke was thus the second known periodic comet. Its period (3.3 years) is the shortest reported until today. Its perihelion is 0.33 AU. After over 60 passages since its first discovery, comet Encke appears as a weak object that has lost most of its gas and dust.