Catalina Station, located near Tucson, Arizona, in the United States. It uses two telescopes, a 1.5 m f/2 telescope on the peak of Mount Lemmon, and a 68 cm f/1.7 Schmidt telescope near Mount Bigelow (both in the Tucson, Arizona area). In 2005, CSS became the most prolific NEO survey surpassing Lincoln Near-Earth Asteroid Research