description Devasthal Observatory Overview
Devasthal Observatory is a modern astronomical facility located in the Nainital district of Uttarakhand, India. Situated at an altitude of approximately 2,500 meters in the Himalayan foothills, it is operated by the Aryabhatta Research Institute of Observational Sciences (ARIES). The site's primary instrument is a 3.6-meter optical telescope, which is currently the largest optical telescope in India. The facility is designed for both optical and infrared observations of celestial objects.
help Devasthal Observatory FAQ
Where is Devasthal Observatory located?
Devasthal Observatory is in the Nainital district of Uttarakhand, India, in the central Himalayan foothills. The site is at an altitude of approximately 2,450 metres and is operated by ARIES. [ARIES](https://www.aries.res.in/about-us/devasthal-campus)
Which telescopes are at Devasthal Observatory?
The campus hosts a 1.3-metre optical telescope, the 3.6-metre Devasthal Optical Telescope, and the 4-metre International Liquid Mirror Telescope. ARIES also operates a 1.04-metre telescope at Manora Peak near Nainital. [ARIES](https://www.aries.res.in/hi/node/1338)
Why was Devasthal chosen for astronomical research?
ARIES selected the site for its dark skies, low extinction, and generally good seeing away from major urban settlements. The institute reports sub-arcsecond seeing as one of the site's advantages. [ARIES](https://www.aries.res.in/about-us/devasthal-campus)
What is the 3.6-metre telescope at Devasthal used for?
The Devasthal Optical Telescope began scientific operations in April 2017 and supports optical and near-infrared imaging and spectroscopy. Its listed instruments include IMAGER, TIRCAM2, ADFOSC, and TANSPEC. [ARIES](https://www.aries.res.in/hi/node/1338)
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