Shijian 2A

SJ 2 (Shi Jian 2) was a Chinese satellite mission to measure and study the micrometeoroids and debris environment and to conduct electromagnetic background experiments. The satellite featured a spin-stabilized octahedral prism-shaped structure and was sun-pointing. The satellite structure had a length of 1.2 m and an outer diameter of 0.615 m. Four deployable solar wings are attached to the top of the satellite.