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 meters (76 inches), 1.52 meters (60 inches), 1.2 meters (47 inches), and 80 centimeters (36 inches), and a 60/90-centimeter (24/36-inch) Schmidt camera. Attached to the 1.93-meter 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-meter telescope. An improved version of Elodie, known as Coralie, is in operation in the southern hemisphere.