han.k

Hi Kalev, I have the images. Changing the binning from auto=0 to 4 in tab alignmnet will fix the alignment problem. Star detection (and therefore alignment) is hampered by the star shape and unequal background. A dark and flat will definitely help as well to equalise the background and remove hot pixels. If you have a newton telescope or something similar probably adjusting the mirrors would help to improve the star shape. Currently several look like tiny comets. cs, Han

Try version 2026.10.14. It should be fixed. cs, Han

Hi Marcin, Thanks for the feedback. That is weird. The compiler GTK3 widget used is brand new and could contains bugs. It does not happen in Win10. Today I can not test the Linux versions, but tomorrow I'm will test both the GTK3 and GTK2 version. If it is the widget, I have to file a bug report for the compiler and fixing could some weeks. cs, Han

upload it to something like https://ufile.io/ and send me the link.

Settings in the screen shot look all good. I like to investigate further. Can you share a few images which do not align during stacking? Then I can test it here and look for the cause. cs, Han

Settings in the screen shot looks all good. I like to investigate further. Can you share a few images which do not align during stacking? Then I can test it here and look for the cause. cs, Han

Settings in the screen shot looks all good. I like to investigate further. Can you share a few images which do not align during stacking? Then I can test it here a look for the cause. cs, Han

The strange thing is that nova.astrometry.net is also failing to solve. I uploaded four images and they all fail to solve. That is very abnormal. But tweaking the FOV to a smaller size helps ASTAP is an indication. The same star count for a smaller FOV will force a higher amount of stars extraction from the database and then there is a solver match. For solving the star density extracted from the image should match reasonable to the star database. But the field-of-view of the star database is square...