Palomar Observatory

Located in North San Diego County, California

Full-time observing: 1949
Operated by: California Institute of Technology
Light observed: Optical
Telescopes at observatory: 200-in Hale Telescope (1948-1993); 48-in Samuel Oschin Telescope (1949-current); 60-in Telescope (1970-current); Palomar Testbed Interferometer (July 1995-December 2008); 18-in Schmidt Telescope (1936-?), decommissioned; 24-in telescope (January 2006 - current); Sleuth Telescope (2003-2007)
Website: Palomar's homepage