First complex scientific satellite with 12 experiments and a total mass of1327 kg. It failed to reach orbit due to a launch vehicle failure. April 27, 1958 at 07:00 UTC · Launch Failure Sputnik 8A91 — Soviet Space Program, to Low Earth Orbit 1/5, Baikonur Cosmodrome, Republic of Kazakhstan The world's 9th orbital launch attempt, and 6th of 1958. Data: Launch Library 2, The Space Devs. Image via The Space Devs.