High Accuracy Radial velocity Planetary Search
High Accuracy Radial velocity Planetary Search (HARPS) is a Spectrographe equipping the telescope with 3,6 meters of the Observatoire of Silla and intended for the search for Exoplanète S, by the method known as of the radial speeds or radial Vélocimétrie.
History
The May 17th 2006, spectrograph HARPS highlighted three neptunian planets around dwarf star orange HD 69830.
Performances
HARPS is, in 2006, the most sensitive spectrograph, since it is conceived to detect, in the long term, of the amplitudes of stellar variation of about 1 meter a second.
Concretely, this spectrograph can detect neptunian planets (from ten to twenty terrestrial masses) with orbital periods which can go until a few hundred days, but it is also theoretically able to detect super-telluric planets (five to fifteen times terrestrial mass) at short period (of a few days at most).
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