Orbiter Luna 19 Unknown Milestones 1973 Impact Table of Anthropogenic Impacts and Spacecraft on the Moon1 Nov 1972 Contact lost Communications lost, after more than a year and 4,000 orbits. NSSDCA Master Catalog and lunar mission pages28 Sept 1971 Launch Beyond Earth: A Chronicle of Deep Space Exploration, 1958–2016 (NASA SP-2018-4041)