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M1 take two


paul
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Despite gremlins on the mount I did manage to bag 1.5 hrs and 3 hrs  on each side of the meridian. Collimation is much better this time!

This image is from the larger stack, gusts of wind I suspect and few DEC issues reduced it to 2hrs usable:

M1_120221_ST.thumb.png.aede235826f901b77e3f085dcbad0cf5.png

I am just getting to grips with image processing with Startools 1.7 (back in the day I used Photoshop + addons). I suspect there is more to get out of the data but the app managed to get me this far. Its pretty impressive at sorting out the uneven illumination given that I didn't have flats.  I binned to 70% original, I may go back and use 50%.

I like spikes but they always seem to get clipped more than I want. More data = better signal to noise =  longer spikes I guess 😀

40x3min @ISO800 550D, Optolong L-Pro filter, Skywatcher coma corrector with my OO250mm and CEM70G.

 

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