2000 AG6 is moving right from the center of the frame. It's image is trailed due to the fast apparent motion (23"/min) and exposure length (20 s).
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Image taken at 21:06:39 UT on Jan. 05, 2000 Exposure: 20s
Image taken at 21:07:20 UT on Jan. 05, 2000 Exposure: 20s