Individual grains immediately above the surface shown against a shadowed area of the nucleus. Many individuals are not smeared at the resolution of the NAC. Given the exposure duration (228 ms) and the scale of the image (≈20 cm/px at the particles), the in-plane velocity of these particles must be <2 m/s. Image: NAC_2014-10-14T220.127.116.111Z_ID10_1397549200_F22.
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