Exosat was an ESA (European Space Agency) satellite for X-ray astronomy that carried out observations of variable X-ray sources in the energy range 0.05–20 keV (corresponding to wavelengths of 0.025–1.24 nanometers). On board were three instruments: an imaging telescope, a proportional counter, and a gas scintillation proportional counter array.
Exosat made 1,780 observations of a wide variety of objects, including active galactic nuclei, stellar coronae, cataclysmic variables, white dwarfs, X-ray binaries, clusters of galaxies, and supernova remnants. It stopped operating after three years, on April 9, 1986.
|launch date||May 26, 1983|
|launch vehicle||Delta 3914|
|launch site||Vandenberg Air Force Base|
|orbit||340 × 191,878 km × 72.5°|