Discovered 1892 Sept. 1 by A. Staus at Heidelberg.
Named by the discoverer in honor of Robert von der Osten-Sacken who lived in Heidelberg as a private scientist. He was an entomologist and his research trips led him many times to the U.S.A. From one of these trips he brought back a 3-inch refractor which he gave to Staus as a present. The planet was named in recognition and gratitude for his friendship. (H 38)
Staus discovered this planet with the 6-inch telescope of Max Wolf's private observatory in the Marzgasse in Heidelberg.
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