Yamato 791197

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Yamato 791197
Type Achondrite
Class Lunar meteorite
Group Anorthositic[1]
Parent body Moon
Country Antarctica
Coordinates 71°30′S 35°40′E / 71.500°S 35.667°E / -71.500; 35.667Coordinates: 71°30′S 35°40′E / 71.500°S 35.667°E / -71.500; 35.667[1]
Observed fall No
Fall date 0.03-0.09 Myr [2]
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.[3]

It is the first rock to be found on Earth identified as a lunar meteorite (see also ALH 81005). It was collected by National Institute of Polar Research, Japan.[1]

Classification and characteristics[edit]

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][4]

It is classified as lunar-anorthositic breccia, a lunar meteorite that is primarily anorthositic.[1]

See also[edit]


  1. ^ a b c d e Meteoritical Bulletin Database: Yamato 791197
  2. ^ Cassidy, William A. (2003). Meteorites, Ice, and Antarctica. Cambridge University Press. p. 186.
  3. ^ Korotev, Randy L. "Lunar Meteorite: Yamato 791197". Washington University in St. Louis, Department of Earth and Planetary Sciences. Retrieved 2011-11-15.
  4. ^ Ostertag, R.; et al. (1985). "Lunar meteorite Yamato 791197: a weakly shocked regolith breccia from the far side of the Moon". Lunar and Planetary Science. XVI/3: 635–636.

External links[edit]