Strange stacking result

[Bojan Stajcar]

I am very new to this application (so far I was using DSS), and interested in ASTAP because of possibility to stack on very faint objects based on ephemerides.
However, my first attempt in stacking producesd strange result, see attached image.
While DSS stack is OK, it seems ASTAP didn't register frames properly.. there is a shift and stars are not round.
Also, I tried to solve one of the CR2 frames and the stacked image below, but solution was not found (I have D50 installed).
What am I doing wrong?
Thank you in advance and clear skies,
Bojan

EDIT: solution works now, as per Han's reply to other post: https://sourceforge.net/p/astap-program/discussion/general/thread/4b88c7bafd/

[Bojan Stajcar]

Bump.

[han.k]

I understand that it works now for you?

You need a first solve to get ASTAP going. To achieve this it requires a reasonable estimate of the field-of-view and an initial celestial position or just try the 180 degrees search. If it does not solve then try blind solving on one of the images: https://www.hnsky.org/astap.htm#solvable to get a first solve. Then ASTAP will remember the position and field-of-view size and solve the other images very rapidly.

Han

[Bojan Stajcar]

Hi @han59,
Thank you for the reply :-)
Yes, the solving works, but stacking has a problem, visible on the image I posted earlier, it seem the registering was not correct.
I expected the similar behavior like DSS, but the stacking result from ASTAP is not good in my case.. What could go wrong here?