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NGC 2903, 2018 January 19

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About this observation
Observer
David Arditti
Time of observation
19/01/2018 - 03:11
Object
NGC 2903
Observing location
Edgware, Middlesex, UK
Equipment
356mm SCT
Astronomik CLS filter
Artemis 285 mono camera
Exposure
12 x 5 minutes
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It seemed a very transparent night, and this was confirmed when I took test exposures of this object with the same equipment as I had on 2017 November 26: the background was far darker. Speaking to other members at the meeting on the 20th, they agreed the 18/19 had been remarkably transparent. I had a processing problem as the most recent flat frames I had were a couple of months old, and the dust bunnies had moved on the camera, so calibration was not perfect and I could not extract as much detail as I should have been able to. The uncalibrated stack shows much longer spiral arms. The LED lights are gradually coming to the streets round me now, but the effect these will have on deep-sky imaging still is not clear. Processing was with Deep Sky Stacker, Adobe Photoshop and GradientXTerminator.

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