1933 OS. Discovered 1933 July 24 by K. Reinmuth at Heidelberg.

Named in memory of Friedrich Tietjen (1832-1895), professor of astronomy at Berlin University and director of the Astronomisches Rechen-Institut since 1874. For many years, he served as an editor of the respected Berliner Astronomisches Jahrbuch and Nautisches Jahrbuch. After a 13-year period of observations of minor planets and comets, Tietjen became the most prolific orbit computer of the ARI. (M 18447) Name proposed and citation prepared by L.D.Schmadel.

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