Achievement of IKAROS — Japanese deep space solar sail demonstration mission

This paper describes achievements of the IKAROS project, the world's first successful interplanetary solar power sail technology demonstration mission. It was developed by the Japan Aerospace Exploration Agency (JAXA) and was launched from Tanegashima Space Center on May 21, 2010. IKAROS successfully deployed a 20 m-span sail on June 9, 2010. Since then IKAROS has performed interplanetary solar-sailing taking advantage of an Earth-Venus leg of the interplanetary trajectory. We declared the completion of the nominal mission phase in the end of December 2010 when IKAROS successfully passed by Venus with the assist of solar sailing. This paper describes the overview of the IKAROS spacecraft system, how the world's first interplanetary solar sailer has been operated and what were achieved by the end of the nominal mission phase.

► JAXA launched the world first interplanetary solar sail spacecraft “IKAROS” in 2010.
► IKAROS successfully deployed the sail and demonstrated the solar sail GNC technique.
► IKAROS completed the nominal mission phase in the end of 2010.
► IKAROS successfully played a role as the precursor of the solar power sail concept.