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Aligning comet RGB images quicker
Posted: 01 Mar 2026, 12:21
by einari
So I have three comet images (RGB) open in AA.
Now if if I point comet in each and try to align them using one star it doesn't work.
Because of this I open these images again in preprocessing and manually align and save each image.
Is this the quickest way or am I missing something?
Re: Aligning comet RGB images quicker
Posted: 02 Mar 2026, 09:20
by Dunmunro
This thread might help:
viewtopic.php?f=6&t=766
I use a one shot colour camera but RGB should be similar.
Re: Aligning comet RGB images quicker
Posted: 02 Mar 2026, 11:54
by einari
It's easier with OSC camera.
Not quite help with BW and 3 separate files.
Also I have poor experience with Motion, WCS aligning.
But I guess I have to know the observatory data, especially the rotation angle of camera (not obvious when using commercial remote telescopes).
Re: Aligning comet RGB images quicker
Posted: 03 Mar 2026, 00:35
by fabdev
Hi, the "One star" method require to set a Radius which must be higher than the expected shift between the images.
Maybe you can solve increasing it to 200 .. 1000.
Fabio.
Re: Aligning comet RGB images quicker
Posted: 05 Mar 2026, 09:41
by einari
That works.
Thanks Fabio.
Re: Aligning comet RGB images quicker
Posted: 05 Mar 2026, 16:21
by Dunmunro
einari wrote: ↑02 Mar 2026, 11:54
It's easier with OSC camera.
Not quite help with BW and 3 separate files.
Also I have poor experience with Motion, WCS aligning.
But I guess I have to know the observatory data, especially the rotation angle of camera (not obvious when using commercial remote telescopes).
Worth a try.
After a successful plate solve, AA9 will report the camera rotation: drop down menu: View->Statistics. ( make sure that there's no rectangles drawn on the image )
My recent image of M3 reports this:
Path = I:\processed astro images\
Size = 4863 x 3253
Pixels = 15819339
Field of view = 39.59' x 26.48' -178.6° ( My bolding and underlining )
Pixel scale = 0.488" x 0.488"
Center = 13 42 10.3 +28 22 33
Range = 809 : 78367
Min (Lum) = 973.59 @ 0,0
Max (Lum) = 60288.63 @ 4754,1870
Background = 1366
Std.deviation = 7580.3263
Average = 3938.4377
Sum = 62303480696