Haute-Provence Observatory

Elodie spectrograph

The Elodie spectrograph covered with its thermal insulation.

Haute-Provence Observatory (Observatoire de Haute-Provence) is a French national facility, established in 1937 and operated by the Centre National de la Recherche Scientifique (CNRS). It is built on a plateau, 645 m (2,100 ft) above sea level, at Saint-Michel in southern France, about 95 km (60 mi) north of Marseilles. Among its instruments are reflecting telescopes with apertures of 1.93 m (76 in), 1.52 m (60 in), 1.2 m (47 in), and 80 cm (36 in), and a 60/90-cm (24/36-in) Schmidt camera. Attached to the 1.93-m telescope is the Elodie spectrograph used to search for exoplanets.



Elodie is a high-resolution échelle spectrograph used in the detection of the first exoplanet, 51 Pegasi. It is fed by a fiber-optic bundle from the Cassegrain focus of the Observatory's 1.93-m telescope. An improved version of Elodie, known as Coralie, is in operation in the southern hemisphere.