ID 716433
Lot 48 | AOUINET LEGRAA — A RARE UNBRECCIATED EUCRITE FROM THE ASTEROID VESTA
Valeur estimée
$ 1 800 – 2 400
Eucrites are volcanic rocks from outer space and there are only two unbrecciated eucrite witnessed falls, a highly desirable feature because the lack of brecciation (the mixing of different rock types) permits scientists to avoid confusion associated with a combination of materials.
Scientific evidence indicates that this sample — and nearly all howardites, eucrites and diogenites (“HED” meteorites) — originate from the asteroid Vesta, the second largest asteroid in the solar system (a view of which can be seen in image 2, not part of the lot, image credit: NASA/JPL-Caltech/UCAL/MPS/DLR/IDA). They arrived on Earth as a result of another asteroid having slammed into Vesta and launching material off its surface into Earth-crossing orbits. NASA’s DAWN spacecraft orbited Vesta in 2011 and provided confirming evidence that Vesta is the parent body of HED meteorites. Similar to lot 57; a large format microscopic image of Aouinet Legraa is featured in lot 58.
Exceedingly fresh, this meteorite is covered in pristine glossy fusion crust except for the fractured face which provides a view of the creamy natural matrix, i.e., material not altered by frictional heating during its descent through Earth’s atmosphere. Vitreous plagioclase laths, pigeonite grains and abundant bronze-colored sulfides abound. There is no terrestrial deformation or alteration. From the asteroid Vesta, this is an exceedingly rare unbrecciated eucrite.
Christie's would like to thank Dr. Alan E. Rubin at the Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles for his assistance in preparing this catalogue.
48 x 25 x 29mm (2 x 1 x 1 in.) and 50.06 grams
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