Date of discovery: unknown
Location of discovery: Zeeman Crater, Earths Moon
Below video shows & explains it better than any ever made.
Here are the coordinates. 72°30'41.04" S 145°30'29.62" W Open Google Earth, Switch to Google Moon. Then put those in or type in "Zeeman Crater". Then make sure you have the Lunar Orbiter slides turned on (LEFT MENU). Then switch between that and the Visible Imagery.