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Artist's conception of the ESRO 2B satellite.

An artist's conception of the ESRO 2B satellite. (Credit: ESRO)

The ESRO 2B satellite being prepared for launch

Integration of ESRO-2B with it's launcher. (Credit: ESA)

Lifetime: May 1968 - December 1968

Operator (primary): European Space Research Organization

Primary Science

The European Space Research Organization 2B satellite, or ESRO 2B for short was primarily intended for the study of X-ray and particle emissions from the Sun. The satellite is also sometimes called Iris, which is an acronym for International Radiation Investigation Satellite.

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A service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/GSFC

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