han.k

Hi Axel, Also best wishes! I can not reproduce your problem here. I have also an AD CMi series but can't get the same effect. But I noticed the Julian Day (JD) in your second image is totally wrong. See attached screenshot. Somehow the program reads a totally wrong JD. Can you have a look to the JD (midpoint) in the list and look if you see something abnormal ? Maybe a file from an other series is in the list? cs, Han

Probably the best fix would be to manually align and stack the three files, red, green and blue. Han

See attached screenshot. cs, Han

The program will while stacking convert automatic to colour. If so the export in FITS will be in colour. If you clearly see colour then the export into TIFF or anything else will be in colour. Note if you do not use FITS then you should really select in the viewer File, Export and then select 32 bit TIFF or 32 bit PFM for export. You could also select 16 bit PNG but 32 bit is better. Or just export to JPG after optimizing.

Probally the quickest way to fix this would be to convert the R, G, B image to 3-colour images first. So the R will be looking red without blue or green and so on. Then ASTAP will stack them correctly.

Hi Rolf, Staking centred on a moving object using separate R, G , B images could be challenging. Personally I have stacked only OSC and mono images. ASTAP will first stack the R, G and B images. then it will combine them into a colour image using the star pattern or astrometric solution alignment. If the images are stacked with ephemeris alignment, then comet will be sharp but the stars not. So combination of the final stacked R, G, B frames will not work. This will require a different stacking method....

Staking centred on a moving object using separate R, G , B images could be challenging. Personally I have stacked only OSC and mono images. ASTAP will first stack the R, G and B images. then it will combine them into a colour image using the star pattern or astrometric solution alignment. If the image are stacked with the ephemeris mode, then comet will be sharp but the stars not. So combination of the R, G, B frames will not work. This will require a different stacking method. Either write a custom...

Download this version with an updated Libraw program: http://www.hnsky.org/astap_setup.exe The Sourceforge version I will updated with a next release. Any update of the version at Sourceforge will send out emails to users to update which is not required for this. To demosaic the raw to colour in the viewer press the F8 button. Since the bright star are already saturated in your 10 sec exposure, use demosaic method "AstroC for saturated stars". See tab "stack method"(ctrl+A) Saturated stars get a...