Yamato 791197, official abbreviation Y-791197, is a meteorite that was found in Antarctica on November 20, 1979.
[3] It is the first lunar meteorite to be found on Earth, but was not identified as such until 1984, after the lunar origin of ALH 81005 was recognised.
[4] It was collected by the National Institute of Polar Research, Japan.
[1] Weighing 52.4 grams, it is a weakly shocked feldspathic regolith breccia believed to have come from the lunar highlands on the far side of the Moon.
[1][5] It is classified as lunar-anorthositic breccia, a lunar meteorite that is primarily anorthositic.