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Tiny Dark Moon

With an average radius of only 200 km (120 mi), this tiny half-illuminated satellite appears spectrally gray with an albedo of 6%. Hints of crater-like forms and groove-like lineations can be seen. The graininess of the image is caused by the short exposure necessary to avoid significant smear. This image was obtained August 25, 1989 from a range of 146,000 km (91,000 mi).

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