I want to observe double stars, but my Go To telescope needs their SAO numbers. Where can I get them?
SAO numbers come from the Smithsonian Astrophysical Observatory Star Catalog (1966). They aren’t normally used by double-star enthusiasts, who prefer special notations such as ADS 1630, S748, and Krueger 60.Finding equivalent catalog designations can be a nightmare. Your best bet is to point the telescope using the star’s right ascension and declination, which are found in any book on double stars. Most Go To mounts provide a way for you to key in these values directly and then execute a Go To command. While some of the very simplest Go To mounts may not, they can always display the current right ascension and declination. While watching this display, slew the mount until the numbers match the coordinates of your target.
— Dennis di Cicco