The Sierra Nevada Observatory (Spanish: Observatorio de Sierra Nevada; OSN; code: J86) is located at Loma de Dilar (2896 m altitude) in the Sierra Nevada mountain range, in the province of Granada, Spain; established in 1981. It is operated and maintained by the Instituto de Astrofísica de Andalucía (Institute of Astrophysics of Andalusia - IAA) and contains two Nasmyth telescopes with apertures of 1.5 and 0.9 metres.

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Sierra Nevada Observatory

Observatory code	J86
Location	Sierra Nevada, Province of Granada, Granada, Spain
Coordinates	37°03′51″N 3°23′05″W
Altitude	2,896 m (9,501 ft)
Established	1981
Website	www.osn.iaa.es
Telescopes	IRAM 30m telescope
Location of Sierra Nevada Observatory
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• The IAA modern optical telescopes
• A radio telescope maintained by IRAM
• Closeup of the IRAM radio telescope
• The older observatory of Mojón del Trigo, situated at 37°05′27″N 3°22′55″W
• The OSN 1.5-metre telescope

• Haumea
• List of largest optical reflecting telescopes

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