Background
Robertson, A. James was born on May 1, 1867 in Rockford, Illinois, United States. Son of Charles A. and Henriette G. (Ward) Robertson.
Robertson, A. James was born on May 1, 1867 in Rockford, Illinois, United States. Son of Charles A. and Henriette G. (Ward) Robertson.
Bachelor of Science, University of Michigan, 1891. Doctor of Science, University of Georgetown, 1933.
Assistant Nautical Almanac Office of the United States Naval Observatory, 1893-1908, principal assistant, 1908-1924, astronomer, 1924-1927, senior astronomer, 1927-1930, head astronomer since 1930, assistant director, 1927-1929, and director, 1929-1939. Professional consultant of Navy Department Mathematics Astonomy, and allied subjects since 1930. Derived the elements of the orbit of the fifth satellite of Jupiter now in use by international agreement in all important almanac offices.
Derived method for computing eclipses now in general use.
Also new method for computing occulations.
Member American Astronomical Union, International Astronomical Union, Astronomischer Gesellschaft, Societe Astronomique de France.
Married Carolina Ancona, October 8, 1903. Married second, Martha P. Worthington, September 21, 1911. Children: Armand J., Marie Ancona, John Ancona.