Texas Longhorn Moon

Texas Longhorn Moon

Waxing crescent Moon shot from Austin, Texas 2016-07-09 05:27 UT. Questar 3.5" telescope with Sony a6300 camera at prime focus. Nine images stacked and deconvolved in Lynkeos with final crop and exposure in Photoshop.

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Date Taken: 2016-07-09
Keywords: Moon




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flickr:Ben Nelemans

Nice picture Rob. I was wondering, as you are stacking the pics, do you have problems of detail misalignment because of the atmosphere convection, or is this not a problem?

flickr:Rob Pettengill

It depends on the seeing. It is not unusual to see the stacked image inferior in detail to the best single image. In those cases I use the non-stellar 8 parameter affine transform alignment in Nebulosity. Alignment can take 10-30 minutes per frame, but the results can be amazing. My standard process:
1 grade and stack in Lynkeos
2 if Lynkeos results are not good, take the best 10 or so images to Nebulosity.
3 non-stellar 8 parameter affine transform alignment in Nebulosity
When I stack I use a statistical sigma 1.5 rejection algorithm rather than straight averaging.

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