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Hélios 2B


Designation 36124 / 09073A
Launch date 18 Dec 2009
Country of origin France
Mission Military: reconnaissance
Perigee/Apogee 680 km sun-synchronous
Inclination 98.1°
Period 98.2 min
Launch vehicle Ariane V193

Launch initially planned in 2008. Entered service in April 2010.

End of life

Out of service Mar 2022
Cause lowering orbit
Decay 14 Dec 2023

sat-index articles

Technical data


Prime contractor Astrium under CNES control
Platform Spot Mk 3
Mass at launch 4200 kg
Mass in orbit  
Dimension 6.0 x 3.6 x 3.4 m
Solar array  
Stabilization 3-axis
DC power  
Design lifetime 9 years

The instrument, designated HRZ for "High Resolution Zoom," is the successor to the imaging assembly on the Helios 1 satellites. It has a mass of 1,124 kg, consumes 418 W of power in standby mode and up to 893 W in use. It offers a significant performance improvement compared to its predecessor, especially in terms of spatial resolution and spectrum width. In particular the ground footprint has been considerably improved, and the incorporation of an infrared channel will enable complementary night detection capabilities.

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