Originally posted by Phage
reply to post by Enlightenme1111
It depends. We are dealing with two things at the same time; image stacking and the tracking of the comet.
The stationary objects are stars.
When the comet is being tracked by the telescope from image to image the hot pixels do not appear to move (much) relative to it.
When the comet is not being tracked from image to image, and the images are stacked, the hot pixels appear to move relative to it.
Hmmmm ... I think you'll have to do better.
When the telescope is tracking something, that object remains rather stationary and everything else moves around it. Any "hot pixels" in the array
remain "fixed" relative to the background. So ... as these additional "hot pixels" seem to move sychronous with Elenin, it would seem that they
may be real objects, course, then there is the fact that these "hot pixels" were given a catalog number.
Also, when something like an observatory buys and installs a CCD array, they "map" every pixel in the array, and at every schedualed maintainance
they remap the aray. This way they know which pixels are not working properly, they even know if it will be a bright spot or a dark one. Doing this is
simple, even if a bit time consuming.
So, dear Phage, they know if it is a "hot pixel" or not, and aren't likely to catalog something they know is an error. As for "your" image
artifacts; I'm going to have to get seat-belts for my chair if ya keep that kind of stuff up.