Coralie is a high-precision échelle spectrograph developed through a collaboration between the Haute-Provence Observatory and La Silla Observatory. It is attached to the Leonard Euler Telescope, and the two instruments together form a dedicated, automated system for searching for large extrasolar planets in the southern hemisphere. Essentially an enhanced version of Elodie, Coralie has superior spectral resolution, a more efficient light detector, and improved instrumental control, including on-line data reduction and analysis. Coralie can measure the radial velocity of a star to a precision better than 7 meters per second (25 km/h) – about the speed of a fast human runner. While in its commissioning phase in 1998, it was used in the detection of a planet in orbit around Gliese 86.