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Contains:  Sculptor galaxy, NGC 253
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Sculptor Galaxy NGC 253

Technical card

Imaging telescope or lens:Planewave CDK14

Imaging camera:SBIG STX 16803

Mount:Paramount ME II

Guiding telescope or lens:Planewave CDK14

Guiding camera:SBIG STX 16803

Software:Adobe Photoship CCCCDWare CCDStack 2CCDWare CCDAutoPilot 5PixInsight

Resolution: 3285x2628

Dates:Nov. 22, 2017

Frames: 81x600"

Integration: 13.5 hours

Avg. Moon age: 3.59 days

Avg. Moon phase: 13.92% job: 2996600

RA center: 11.881 degrees

DEC center: -25.286 degrees

Pixel scale: 0.728 arcsec/pixel

Orientation: 359.561 degrees

Field radius: 0.425 degrees

Locations: Sierra Remote Observatory, Auberry, California, United States

Data source: Own remote observatory

Remote source: Sierra Remote Observatories


This was shot very low in the sky with some of the subs coming in as low as 18 degrees. The highest was around 24-45 degrees. Being so low in the sky gradients were an issue. I used PI ABE and DBE to resolve as best I could.

24L, 19R, 23 G, and 15 B. All 10 minute subs, total of 13.5 hours. I created a super-luminance by adding the luminance data from the color subs to the luminance data itself. That increased SN significantly and helped allow more sharpening to be applied.

I plan to add some Ha and see what that does. Also some more Blue to help out. I sharpened the Luminance prior to creating the LRGB and it looks much more detailed that the final LRGB. I do shoot color bin 1 so I may just need a bit more?



Kevin Morefield
License: None (All rights reserved)



Gradient removal and LAB color adjustments

Sky plot

Sky plot


Sculptor Galaxy NGC 253, 


            Kevin Morefield