Alden, Harold Lee
BornChicago, Illinois, USA, 10 January 1890
DiedCharlottesville, Virginia, USA, 3 February 1964
Although the Yale University Observatory station in South Africa was the idea of Frank Schlesinger, it was American Harold Alden who took most of the tens of thousands of photographic exposures that led to the determination of hundreds of new stellar parallaxes (1925–1945). Alden was later the director of the Leander McCormick Observatory.