Strange artifact

[Starwiz]

OK, this is rather weird.  Ha, OIII and SII stacked in ASTAP.

See the two 'stars' at the end of each of the yellow lines.

This isn't visible in the individual lights, so I can only think it is some sort of stacking artifact?  It appears in all channels.

John

[rickwayne]

That is...completely whack. Why only those seven spots? Do the individual subs have stars there? Can you blink to see if any of them have them in a different position? (Still  can't imagine why only those particular places would be affected, though.)

[Craney]

I think that one qualifies for    " Arthur C Clarke's Mysterious World..."

must be a stacking option or something like that. ??

[Clarkey]

Very odd. Try stacking in a different software. If they are still there you have discovered something completely new. You could name them Whizzy Stars or something like that!!!

[Starwiz]

While doing some more processing this morning, I noticed another artifact, but this one occurs at 90 degrees to the other and is smaller.  This also occurs at multiple places throughtout the image.

I'm thinking that it might be some sort of alignment feature added by the stacking program, but not cleaned up.