Named in memory of Milton L. Humason (1891–1972), who provided all the larger redshifts in the Hubble-Humason epoch-making program. Unrivaled in obtaining spectrograms of very faint galaxies, he correctly identified the few available features. Originally a mule skinner who brought up material for the construction of the Mount Wilson Observatory, he rose through the ranks as a janitor, night assistant and telescope user for colleagues. Appointed a regular staff member with only grammar-school education, he was eventually awarded an honorary degree by the University of Lund. (M 8403) _ _.