Infrared Optical Telescope Array

The Infrared Optical Telescope Array was an observatory facility on Mount Hopkins that used multiple 45-centimeter telescopes working together to observe celestial objects in the infrared spectrum. These telescopes functioned as an interferometer, combining their data to produce images with much higher resolution than any single instrument could achieve.

The facility was established in 1993 through collaboration between five institutions including Harvard University and the Smithsonian Astrophysical Observatory. Operations continued until 2006, during which time it contributed significantly to research on stellar formation and planetary systems.

Scientists and researchers from different institutions gather at this facility to study stellar formation, planetary systems, and early cosmic evolution.

The high desert location in Arizona provided clear skies with minimal atmospheric interference, allowing for precise observations on most nights. Visitors should note that the facility is no longer operational, though the Mount Hopkins site remains relevant to modern astronomy.

By combining signals from multiple small telescopes, the array could achieve the resolution of a much larger single instrument, a technique that was remarkably innovative at the time. This approach allowed astronomers to see fine details of distant stars and planets that would have been impossible to resolve with conventional telescopes.

Location: Arizona

Part of: Fred Lawrence Whipple Observatory

Website: http://tdc-www.harvard.edu/IOTA

GPS coordinates: 31.69150,-110.88500

Latest update: December 14, 2025 11:04