Named in honor of Günter Preiss (1929– ) on the occasion of his retirement in 1992 from the position of lawyer and administrator of the Max-Planck-Society. He earned great merit through his involvement in the construction and development of the Max-Planck-Institut in Heidelberg and also at its observatory at Calar Alto in southern Spain. The same holds for his involvement in the Institut für Radioastronomie in Bonn. (M 21607) _ _.