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