Apollo 16 was the tenth manned mission in the Apollo program, the fifth mission to land on the Moon and the first to land in a highlands area. The mission was launched on April 16, 1972, and concluded on April 27. It was a J-class mission, featuring a Lunar Rover and it brought back 94.7 kg of lunar samples. It included three lunar EVA: 7.2 hours, 7.4 hours, 5.7 hours and one trans-earth EVA of 1.4.
The Apollo 16 sub-satellite was launched from the CSM while it was in lunar orbit. The sub-satellite carried out experiments on magnetic fields and solar particles. It was launched April 24, 1972 at 21:56:09 UTC and orbited the Moon for 34 days and 425 revolutions. It had a mass of 80 lb (36 kg) and consisted of a central cylinder and three 1.5 m booms.
En route to the moon, the Apollo 16 astronauts took several photos of Earth, one of which was with North America in the background, with much of the northern portion of the continent under extensive cloud cover.
Despite a malfunction in the Command Module which almost aborted the lunar landing, Apollo 16 landed successfully in the Descartes Highlands on April 21.
Launch date: April 16, 1972 17:54:00 UTC
Lunar Landing: April 21, 1972 02:23:35 UTC
Landing: April 27, 1972 19:45:05 UTC
Measured 4 inches (10.16 cm) across.