CP6, also known as PolySat-6, PolySat CP-6 or CalPoly 6 is a single-unit CubeSat which was built and operated by the California Polytechnic State University. It was primarily intended to perform a technology demonstration mission. The main experiment consisted of sensors to determine the spacecraft's attitude. Cameras on the satellite will be used to verify the data returned by the attitude sensors. Originally built as a backup to CP3, which was launched in April 2007, CP6 was modified after it was decided that it would no longer be needed for that role.