Siedentopf

1989 AN6. Discovered 1989 Jan. 11 by F. Borngen at Tautenburg.

Named in memory of Heinrich Siedentopf (19061963), professor of astronomy and director of the observatories in Jena (1933-1945) and in Tubingen (1949-1963). His research activities covered stellar atmospheres, in particular the theory of convection and solar granulation, interplanetary matter, optics of the earth's atmosphere, and astronomical instruments. He introduced the iris-diaphragm method for photographic stellar photometry. Together with O. Heckmann and W. Fricke {see planets (1650) and (1561), respectively} he was one of the German promoters of the European Southern Observatory. (M 21611)

Citation prepared by H. Elsasser at the request of the discoverer.

Siedentopf is also honored by a lunar crater.

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