WIYN 3.5-meter Telescope


The Kitt Peak National Observatory is located on Kitt Peak of the Quinlan Mountains in the Arizona-Sonoran Desert on the Tohono O'odham Nation. With over twenty optical and two radio telescopes, it is one of the largest gatherings of astronomical instruments in the northern hemisphere.

The Wisconsin-Indiana-Yale-NOIRLab (WIYN) Observatory is situated atop Kitt Peak National Observatory. It is owned and operated by the WIYN Consortium, which consists of the University of Wisconsin, Indiana University, NOIRLab, the University of Missouri and Purdue University. This partnership between public and private universities and NOAO was the first of its kind. The telescope hosts the NEID instrument, which is a state-of-the-art exoplanet-discovery machine. 


WIYN logo

For scientists: More details can be found on the science telescope page.


WIYN 3.5-meter Telescope

Name(s) The WIYN 3.5-meter Telescope
Status Operational
Broad Science Goals  
Site Kitt Peak National Observatory, Arizona, USA
Location Coordinates 31º 57’ 29.4" N
111º 35’ 53.8" W
Altitude 2090.0
Optical Design Ritchey-Chretien Cassegrain.
Field of View 12 arcmin 
Diameter: Primary M1 3.5 meters
Material: Primary M1 borosilicate glass 
Diameter: Secondary M2 1.2 meters
Material: Secondary M2 Zerodur glass
Diameter: Tertiary M3 1.2 meters
Material: Tertiary M3  
Mount Altitude-azimuth Mount
First Light Date 1994
Adaptive Optics  
Images taken with the WIYN 3.5-meter Telescope Link
Images of the WIYN 3.5-meter Telescope Link
Videos of the WIYN 3.5-meter Telescope Link
Press Releases with the WIYN 3.5-meter Telescope Link

Please help us to complete this page by emailing information and corrections to info@noirlab.edu.