Odd artifacts apres stack in ASTAP

[Astrodd]

Hi All,

I am new so please go easy on me if there is something I'm missing.  I tried to image Bode's galaxy with a pretty wide lens to get my feet wet. I'm using a Star Adventurer with a Canon t2i and Red Cat 51. It took me quite some time to learn but I am becoming familiar with kstars and ekos. Using plate solving, I was able to position my rig to image Bode's galaxy. I was so excited to get it in frame that I didn't make any small adjustments (I'm not sure these adjustments will ever be intuitive when the target is almost overhead). I imaged 15x60s and had to toss a few because of satellites. I am using ASTAP to stack. I have dozens of weird artifacts (red/green/blue lines/trails) and I am not sure what I did wrong. For what it's worth, I did not find these artifacts in any single shot. Here is my image:

Thanks for any advice.

[Astrodd]

Here is a cropped example.

 

 

[geordie85]

They're hot pixels. Dithering should get rid of them. 

[han59]

Use method "Sigma clip average" for stacking. This will detect that the hot pixels are outliers and remove them.

 

 

 

[Astrodd]

Thanks for the help. I will try this after work today. I will also make sure to use dithering from now on.