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X-ray Multi-Mirror, also called XMM-Newton


Designation 25989 / 99066A
Launch date 10 Dec 1999
Country of origin Europe
Mission Astronomy: X-ray astronomy
Perigee/Apogee 7400/114000 km
Inclination 60°
Period 2 days
Launch vehicle Ariane V119 504

ESA astronomy satellite worth DM 400 million

Largest satellite ever built in Europe. Will focus on black holes and diffuse background.

External resources


sat-index articles

Technical data


Prime contractor Astrium (was Dornier)
Mass at launch ~ 4000 kg
Mass in orbit  
Dry mass 3234 kg
Dimension 10 m long x 4 m diameter
Solar array  
DC power  
Design lifetime 10 years

XMM carries 3 telescopes of 70 cm diameter (with 58 overlapping mirrors each). It also carries an 0.30 m aperture optical/ultraviolet telescope, the Optical Monitor, which will allow simultaneous measurements of the optical and ultraviolet light from the source being studied with the X-ray telescopes. Pointing accuracy of the telescope array is 0.25 seconds of arc.

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