The DS-MT satellites were a series of Soviet technolgy demonstration satellites launched as part of the Dnepropetrovsk Sputnik program. June 1, 1963 at 02:50 UTC · Launch Failure Kosmos-2I — Soviet Space Program, to Low Earth Orbit Mayak-2, Kapustin Yar, Russian Federation The world's 250th orbital launch attempt, and 26th of 1963. Data: Launch Library 2, The Space Devs. Image via The Space Devs.