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|+ Minor planets discovered: 16

At the time, the observatory at Heidelberg was a center of asteroid discovery under Max Wolf. During Dugan's stay there, he discovered 16 asteroids between 1902 and 1904, notably including 511 Davida. The lunar crater Dugan and the main-belt asteroid 2772 Dugan are named in his honour.

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  • Amherst College Class of 1899
  • List of Dissertations at the Landessternwarte Heidelberg-Königstuhl