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Comet C/2020 F3 NEOWISE on 22 July

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About this observation
Observer
Peter Tickner
Time of observation
22/07/2020 - 23:32
Object
Comet C/2020 F3 NEOWISE
Observing location
Urban Berkshire
Equipment
ZWO ASI071 MC Pro CMOS camera
130mm f/7 triplet APO
Riccardi 0.75 reducer
OAG with ZWO ASI120MM
EQ6 Mount
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Despite patchy cloud I was determined to image NEOWISE on 22 July as I knew its closest appropach would be the following night when heavier cloud was forecast and there would be no chance.   In the end I took several sets of images at different exposure times, 8 seconds, 15 seconds and 30 seconds.   In going through them aftewards many of the sets had been compromised by cloud but I managed to find a sequence of 40 images, of which these are the better 20 at 30 seconds per image, which I stacked on both the comet and then a short stack on the stars and then blended the two images together.  To bring out more detail of the comet's features I have also produced a negative black and white image of the same data.

Peter 

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