Unless stated otherwise all images were taken with a ZWO ASI-178mm mono camera

Messier 51.  20cm SCT, F5 (0.5x Focal Reducer), exp 5 sec x 225 frames = 19 min, limiting magnitude=19.0.

Messier 81.  20cm SCT, F5.0 (0.5x focal reducer), 5 sec x 162 frames = 13.5 min.

Messier 82.  20cm SCT, F10, 5 sec x 120 frames = 10 min.

NGC 891.  20cm SCT, F10, 2 sec x 360 frames = 12 min.

M102.  20cm SCT, F10, 3 sec x 280 frames = 14 min.

NGC 7217.  20cm SCT, F10, 5 sec x 280 frames = 23 min, limiting magnitude = 19.0.

The White Zone

An Urban Astronomer's Light Pollution Guide to Balcony Imaging

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