Japanese Lunar Exploration Program km on opposite sides of the lunar body. The penetrators were to have been braked by a small rocket at an altitude of 25 km, then free fall to the surface. They were designed to withstand a collision speed of 330 meters per second to deeply penetrate the lunar regolith. Once the penetrators are deployed, the LUNAR-A spacecraft was mission-planned to maneuver to an orbital altitude of 200 km above the lunar surface. The craft was to have carried a monochromatic imaging camera with a resolution of 30 m. It was to be Japan's first large scale lunar probe. (Hiten
Explorer 47 Explorer 47 Explorer 47, also known IMP-7 and Interplanetary Monitoring Platform IMP-H, was an American satellite launched as part of Explorers program. Explorer 47 as launched on 23 September 1972 on Cape Canaveral, Florida, U.S., with an Delta rocket. Explorer 47 was the seventh satellite of the Interplanetary Monitoring Platform. Explorer 47 continued the study begun by earlier IMP spacecraft of the interplanetary and magnetotail regions from a nearly circular orbit, near 37 earth radii. This 16 sided drum-shaped spacecraft was high and in diameter. It was designed to measure energetic particles, plasma and electric and magnetic fields. The spin