1421 Esperanto in the outer asteroid belt at a distance of 2.8–3.4 AU once every 5 years and 5 months (1,983 days; semi-major axis of 3.09 AU). Its orbit has an eccentricity of 0.08 and an inclination of 10° with respect to the ecliptic. The body's observation arc begins with its first observation as at Heidelberg Observatory in October 1906, almost 30 years prior to its official discovery observation at Turku. This minor planet was named by the discoverer after the artificial language, Esperanto, which was created by inventor and writer, Ludwik Lejzer Zamenhof (1859–1917), who used the pseudonym "Doktoro Esperanto". The
Ludwik Krzywicki Ludwik Krzywicki Ludwik Krzywicki (21 August 1859 – 10 June 1941) was a Polish anthropologist, economist and sociologist. One of the early champions of sociology in Poland, he approached historical materialism from a sociological viewpoint. From 1919 to 1936 he was a professor at the University of Warsaw. Ludwik Krzywicki was born at Płock in 1859 into an aristocratic but impoverished family. From an early age he showed an interest in psychology, philosophy and natural sciences, and studied the works of Darwin, Taine, Ribot and Comte. Krzywicki studied mathematics at the University of Warsaw in Congress Poland. After obtaining his