| Yamato 791197 | |
| Type: | Achondrite |
| Class: | Lunar meteorite |
| Group: | Anorthositic |
| Parent Body: | Moon |
| Country: | Antarctica |
| Lat Long: | -71.5°N 75°W |
| Observed Fall: | No |
| Fall Date: | 0.03–0.09 Myr[1] |
| Found Date: | November 20, 1979 |
| Tkw: | 52.4 g |
Yamato 791197, official abbreviation Y-791197, is a meteorite that was found in Antarctica on November 20, 1979.[2]
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.[3] It was collected by the National Institute of Polar Research, Japan.
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.[4]
It is classified as lunar-anorthositic breccia, a lunar meteorite that is primarily anorthositic.