Short answers, pulled from the story.
NASA designated Apollo 10 as an F-mission to serve as a full dress rehearsal for the first lunar landing. Mission planners decided against attempting an actual Moon landing on this flight to ensure all spacecraft components and procedures were tested short of descent.
Thomas P. Stafford served as commander of Apollo 10 at age thirty-eight when the mission launched. John Young commanded the Command Module Pilot role and Gene Cernan flew as Lunar Module Pilot, forming the most experienced crew to reach space until the Space Shuttle era.
Apollo 10 lifted off from Kennedy Space Center on the 18th of May 1969, at 16:49:00 UTC. The launch window opened for four and a half hours to secure optimal lighting conditions for the upcoming lunar landing site photography.
Stafford and Cernan flew the Lunar Module Snoopy to within seven point eight nautical miles of the Sea of Tranquility surface. This distance marked the point where powered descent for landing would begin on a future landing mission.
The ascent stage of the Lunar Module Snoopy jettisoned into a heliocentric orbit and its whereabouts remained unknown until amateur astronomers began searching for it in 2011. A group determined that small Earth-crossing asteroid 2018 AV2 is likely to be the spacecraft with ninety-eight percent certainty.