It was an unmanned probe to examine the moon and to scout out landing sites for future spacecraft. And, it was launched on this day in history.
Lunar Orbiter 2 was the second in a series of unmanned NASA probes made to photograph and study the moon in great detail. Part of its mission was to find safe landing sites for future unmanned and manned landing missions to the moon.
The probe was launched aboard an Atlas-Agena rocket on November 6th, 1966. After just under four days, it entered lunar orbit and took over 800 photographs as well as other types of data. It was used for other purposes until it impacted on the moon the next year.
This impact site of Lunar Orbiter 2 was later found in 2011 by the Lunar Reconnaissance Orbiter.