Edit info. 5. Dec-2022.
Image revision "D". Tried to make a color version of the image shift.
M1 colors were taken from what I had/made at that time in 2016 and 2022 :-)
Used app. same stack size between the two Lum stacks from 2016 and 2022.
Improved registration of the two images. Size 100% and even a more cropped view.
M1 color info., 2022 & 2016, was taken from these two images,
https://astrob.in/4jugzs/D/https://astrob.in/235582/B/Edit info. 2 Dec-2022.
FYI,
APOD: 2020 January 19 - M1: The Incredible Expanding Crab Nebula (nasa.gov)Please check left top corner of the gif image/seq. for the year info.
The image with the most shown nebula is from 2017! The oldest one.
Had this M1 Lum stack from Febr-2017 ready on my HDD,
https://www.dl.dropboxusercontent.com/s/2m4hinlpuc88z7u/M1-2017Lum0568mean-59-30secMixCenter25-60sec.jpg?raw=1Old info.
A size 100pct Gif animation, images from 2017->2022, app. stacks are 5 years apart, different Lum stack sizes.
Is there, from earth, a visible nebula expansion in 5 years?
Was triggered by this one,
https://astrob.in/yix6cj/0/To make my own M1 Gif animation :-)
Two LUM stacks used, one from Jan 2019: 60x30sec and one from Jan 2022: 30x60sec.
Darks used, but no flats was used in the calibration phase.
Same SW processing sequence was used on both stacks, only a linear stretch.
SW tools CCDStack2 -> PI -> PS CS6 -> Gif animation tool.
Is there a real visible, seen from earth, nebula expansion in only 3 years?
As usual it's taken in a light polluted area, Bortle 6 sky looking south, Bortle 7 sky the other directions/ surroundings.
My home build observatory is placed in my front yard/in the "red light" pollution zone, have a look here,
Red ZoneCS Niels
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