1991 RX2. Discovered 1991 Sept. 9 by L. D. Schmadel and F. Borngen at Tautenburg.

Named in memory of Adalbert Prey (1873-1949), professor of astronomy in Innsbruck, Prague and, eventually, Vienna, where he was elected to membership in the Austrian Academy of Sciences. After World War II until his death he served as one of the two secretaries of the Academy. He worked on the motion of 70 Oph (sometimes called "Prey's star"), as well as on the dynamics of minor planets and the moon. He thoroughly investigated the field of isostasy and gravitation, to which he devoted a series of papers. (M 31296)

Named by the first discoverer following a suggestion by H. Haupt, who also prepared the citation.

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