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Schmutz in Dawn's framing camera

Schmutz in Dawn's framing camera
Schmutz in Dawn's framing camera Stacking all the images from the May 4, 2015 Rotation Characterization 3 animation reveals 9 spots that are anomalously dark in all images in which they fall atop Ceres. Because their edges are crisp they likely represent something on the detector rather than in the optics (where they'd be out of focus). NASA / JPL / UCLA / MPS / DLR / IDA / Emily Lakdawalla