Mariner 3 was a 260 kg solar-cell and battery-powered spacecraft designed to make scientific measurements in the vicinity of Mars and to obtain photographs of the planet's surface and transmit these to Earth. November 5, 1964 at 19:22 UTC · Launch Successful Atlas LV-3 Agena D — United States Air Force, to Mars flyby Space Launch Complex 13, Cape Canaveral SFS, FL, USA The world's 378th orbital launch attempt, and 85th of 1964. Data: Launch Library 2, The Space Devs. Image by NASA (NASA Image and Media Guidelines) via The Space Devs.