The Aitken Double Star Catalogue (ADS) is the name by which Robert Aitken's massive New General Catalogue of Double Stars within 120 degrees of the North Pole is generally known. Published in two volumes by the Carnegie Institution in 1932, it superceded Sherburne Burnham's 1906 catalogue, contained measurements of 17,180 double stars north of declination –30°, and allowed orbit determinations that greatly improved knowledge of stellar masses.