Named in memory of Sergej Ivanovich Sorin (1916–1995), astronomer and teacher who participated in the choice of a site for the astronomical observatory of the Azerbaijan Academy of Sciences and in equipping it with telescopes and other instruments. Head of the astronomical circle at the Baku Young Pioneers’ Palace for some forty years, he was an outstanding educator of young amateur astronomers. Many of his pupils became prominent astronomers and are working now at various observatories in the former Soviet Union. (M 34622) _ _.