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Linear cratering on tiny asteroid

I just found this remarkable asteroid, though imaged by the Rosetta fly-by  during the 7 minute encounter in 2008.

This 5 km asteroid has 23 named craters. There are about 9 round individuals in a line on the right side of the image.

This must have been an exciting sequence of electric discharges with the asteroid rotating during the encounter. This asteroid still rotates every 6 hours.

I imagine these craters require an awkward explanation for impacts.

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