Harold Jacoby
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Harold Jacoby (1865–1932) was an American astronomer, born in New York City. He graduated at Columbia in 1885.
Jacoby was a professor of astronomy at Columbia University, and chaired the department until shortly before his death. Columbia's Rutherford Observatory was started during his tenure, with a twelve inch Clarke refractor telescope and a transit instrument emplaced atop Pupin Hall.
He made many observations of celestial events such as lunar and solar eclipses. He was well-known in Europe and America, and was a member of a large number of scientific groups. He published Practical Talks by an Astronomer (1902) and Astronomy: A Popular Handbook (1913).