Mt. Palomar, California
The 200-inch (5.1 m) Hale Telescope (f/3.3) was the world's largest effective telescope for 45 years (1948 - 1993). It is still a workhorse of modern astronomy. It is used nightly for a wide range of astronomical studies. On average the weather allows for at least some data collection about 290 nights a year.
|Aperture: 5 meters||Latitude: 33 21 N|
|First light: 1948||Longitude: 116 52 W|
|Elevation: 1900 meters|