An observatory near Tucson, Arizona, USA, site of the largest collection of optical telescopes in the world. The largest is the 4-m/158-in Mayall reflector (1973). Kitt Peak is part of the National Optical Astronomy Observatories, which also includes the Cerro Tololo Inter-American Observatory in Chile, operating a similar 4-m reflector to that at Kitt Peak, and the National Solar Observatory, which has instruments on Kitt Peak including the McMath-Pierce solar telescope, the world's largest telescope for observing the Sun.
General information
| Kitt Peak National Observatory | |
| Organization | NOAO |
| Location | Tohono O'odham Nation, Arizona, United States |
| Coordinates | 31° 57.5' N, 111° 35.8' W map |
| Altitude | 2,096 m (6,875 ft) |
| Weather | 72% clear nights |
| Webpage | http://www.noao.edu/kpno/ |
| Telescopes | |
| KPNO Nicholas U. Mayall Telescope | 4.0 m Ritchey-Chrétien reflector |
| WIYN Telescope | 3.5 m Ritchey-Chrétien reflector |
| McMath-Pierce Solar Telescope | Unobstructed solar reflector |
| KPNO 2.1 m Telescope | Fourth largest on the mountain |
| Coudé Feed Tower | Coudé spectrograph |
| SOLIS/Kitt Peak Vacuum Telescope | Solar telescope |
| Razdow Telescope | Weather monitoring for the solar telescopes |
| WHAM Telescope | Milky Way temperature and density mapping |
| RCT Consortium Telescope | Remotely controlled |
| WIYN 0.9 m Telescope | Galactic studies |
| Calypso Observatory | Only private telescope on the mountain |
| CWRU Burrell Schmidt | Galactic studies |
| SARA Observatory | Variable stars, undergraduate training |
| ETC/RMT | No longer operating |
| Spacewatch 1.8 m Telescope | 72 in mirror scavenged from the Mount Hopkins MMT |
| Spacewatch 0.9 m Telescope | Spacewatch |
| Super-LOTIS | Follow-on to the ETC/RMT |
| HAT-1 | Recently relocated to nearby Mount Hopkins |
| Bok Telescope | Versatile |
| MDM Observatory 1.3 m McGraw-Hill Telescope | Originally at Ann Arbor |
| MDM Observatory 2.4 m Hiltner Telescope | Galactic surveys |
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