Yamato 791197, official abbreviation Y-791197, is a meteorite that was found in Antarctica on November 20, 1979. 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. It was collected by the National Institute of Polar Research, Japan.

Classification and characteristics

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. It is classified as lunar-anorthositic breccia, a lunar meteorite that is primarily anorthositic.