The Sierra Nevada Observatory (OSN) ia an high mountain observatory located at Loma de Dílar, in the ski resort of the Sierra Nevada mountain range (Granada, Spain). The OSN is operated, maintained and supplied by the Instituto de Astrofísica de Andalucía (IAA-CSIC). It consists of a main bulding which hosts two Nasmyth optical telescopes of 1.50-m and 0.90-m each, as well as other astronomical and non-astronomical facilities belonging to IAA and other scientific institutions.

Geographic coordinates and altitude

Longitude: W 03º 23´ 05"
Latitude: N 37º 03´ 51"
Altitude: 2896 m