01-12-2019, 11:38 AM
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Raider Nation
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Join Date: Apr 2014
Location: Adelaide
Posts: 691
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NGC 1097 from the 'burbs
Tried a bit of an experiment to see if, with enough data, a decent image could be obtained under light pollution. A quick calculation suggested that, for my location, about 7x more data was needed than in a dark sky site - so about 40 hours or so should be the same as one night at a dark site.
The experiment is not conclusive without doing the same object at a dark site! But even after 40+ hours of data, there is still a lot of noise in this image and not great detail - though admittedly some nights the seeing was appalling, so may be a bit of an ambiguous outcome to the experiment.
Though I think it's cool seeing the detail brought out by stacking (see the one sub vs luminance stack comparison image).
Oh, and the 2000+ luminance frames made PixInsight (and my poor CPU) sweat a bit! :-)
Full res available on Astrobin here, though please don't go pixel peeping as, as I said, it's a bit rubbish I think.
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