Yamato 791197

{{Short description|First known lunar meteorite found on Earth}}

{{Infobox meteorite

|Name= Yamato 791197

|Image=

|Image_caption=

|Type= Achondrite

|Class= Lunar meteorite

|Group= Anorthositic

|Structural_classification=

|Parent body = Moon

|Composition=

|Shock=

|Weathering=

|Country= Antarctica

|Region=

|Lat_Long= {{coord|71|30|S|35|40|E|display=inline,title}}{{metbull|26546|Yamato 791197}}

|Observed_fall= No

|Fall_date= 0.03–0.09 Myr{{cite book|last=Cassidy|first=William A.|title=Meteorites, Ice, and Antarctica|publisher=Cambridge University Press|page=186|year=2003}}

|Found_date= November 20, 1979

|TKW= 52.4 g

|Image2=

|Image2_caption=

}}

Yamato 791197, official abbreviation Y-791197, is a meteorite that was found in Antarctica on November 20, 1979.{{cite web|last=Korotev|first=Randy L.|title=Lunar Meteorite: Yamato 791197|url=https://sites.wustl.edu/meteoritesite/items/lunar-meteorites/|publisher=Washington University in St. Louis, Department of Earth and Planetary Sciences|access-date=2011-11-15}}

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.{{Cite web |title=Lunar Meteorite: Yamato 791197 {{!}} Some Meteorite Information {{!}} Washington University in St. Louis |url=https://sites.wustl.edu/meteoritesite/items/lm_yamato_791197/ |access-date=2024-08-04 |website=sites.wustl.edu}} It was collected by the National Institute of Polar Research, Japan.