Quote:
Originally Posted by Rob_K
Thanks Carl. Yes, I noticed those, and they appear in each of the three subs that were stacked to produce this. There was very slight comet movement between each sub (a couple of pixels). I was going to make a stack on the comet head but as you can see it's very difficult to pick a point (a difficulty which has apparently made precise astrometry a problem). So I stacked on the stars. If those dots were part of the comet they would have gone an obvious bean shape. They didn't so they must be a chance alignment of underlying field stars. 
Cheers - |
It's hard to tell if some of those dots are bean shaped or not...they're so small...and that head is pretty crowded with stuff. You'd expect some change in the shape of the objects. That's why it's probably best to keep it in mind in any case and nail it for good by getting a bigger scope onto the task. You're probably correct in saying it's most likely just a chance alignment of stars, but you never know
