https://en.bharatpedia.org/w/index.php?action=history&feed=atom&title=3.6m_Devasthal_Optical_Telescope 2026-08-29T09:40:48Z Revision history for this page on the wiki MediaWiki 1.43.6 https://en.bharatpedia.org/w/index.php?title=3.6m_Devasthal_Optical_Telescope&diff=406081&oldid=prev 2023-08-13T17:15:31Z

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<p><span class="autocomment">See also: </span> additional</p> <p><b>New page</b></p><div>{{Infobox telescope}}<br /> {{Use dmy dates|date=December 2019}}<br /> {{Use Indian English|date=December 2019}}<br /> The &#039;&#039;&#039;3.6m Devasthal Optical Telescope&#039;&#039;&#039; is a clear-aperture [[Ritchey–Chrétien telescope]] built by [[Aryabhatta Research Institute of Observational Sciences]] (ARIES) and is located at the [[Devasthal Observatory]] site near [[Nainital]], [[Uttarakhand]], India. ARIES operates another 1.3m telescope at the same location. The telescope was activated remotely on 31 March 2016 by Indian Prime Minister [[Narendra Modi]] and Belgian Prime Minister [[Charles Michel]] from Brussels. The telescope optics has been built in collaboration with the Belgian firm Advanced Mechanical and Optical System (AMOS).<br /> <br /> The 3.6m DOT is currently the largest reflecting telescope in Asia.&lt;ref&gt;{{cite web|title=&#039;Remote Technical Activation&#039; of the 3.6m Devasthal Optical Telescope at Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital|url=http://pib.nic.in/newsite/PrintRelease.aspx?relid=138446|publisher=Press Information Bureau, Government of India}}&lt;/ref&gt; The telescope intends to fill a large longitudinal gap in the 4m class of telescopes in the Asia region. The telescope features an optical spectrograph, a CCD imager and a near-infrared spectrograph. The telescope is also the first of its kind in India that features an [[adaptive optics|active optics]]&lt;ref&gt;{{cite book|last1=Sagar|first1=Ram|editor3-first=Helen J|editor3-last=Hall|editor2-first=Roberto|editor2-last=Gilmozzi|editor1-first=Larry M|editor1-last=Stepp|title=Ground-based and Airborne Telescopes IV |volume=8444|pages=84441T|doi=10.1117/12.925634|arxiv=1304.2474|chapter=New optical telescope projects at Devasthal Observatory|series=Proceedings of the SPIE|year=2012|bibcode=2012SPIE.8444E..1TS|s2cid=119272065}}&lt;/ref&gt; system, featuring a wavefront sensor and pneumatic actuators which compensates for small distortions in the shape of the 4.3 tonne mirror due to gravity or atmospheric aberrations.<br /> <br /> ==See also==<br /> * [[Aryabhatta Research Institute of Observational Sciences]]<br /> * [[List of largest optical reflecting telescopes]]<br /> * [[Lists of telescopes]]<br /> <br /> ==References==<br /> {{Reflist}}<br /> <br /> ==External links==<br /> *{{Commons category inline}}<br /> {{Portal bar|India|Astronomy|Stars|Spaceflight|Outer space|Solar System|Education|Science}}<br /> [[Category:Optical telescopes]]<br /> [[Category:Astronomical observatories in India]]<br /> <br /> <br /> {{Observatory-stub}}</div>

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