Hi all, I've been battling with this for pretty much most of the day now. I'm doing a stack in Pixinsight and it seems to throw away a signficant number of my frames during the registration process. The error I get is:
** Error: RANSAC: Unable to find a valid set of star pair matches.
For some reason some of my subs just won't register. The results are dependent on which frame I use as my reference frame. Playing with the settings in the Batch Pre-Processor doesn't resolve the error or number of images causing the error. It does change the number of stars detected but this hasn't been a problem so far with nearly every image coming up with a note saying it's selected the "500 brightest stars".
I've posted an example of two images before. Before anyone points out the obvious that one is upside down, I know
. But that doesn't seem to be the problem as subsequent frames after the meridian flip register fine.
Normally I wouldn't fuss about this but it's throwing away 1/4 of my data in this case! I can't see any problem with SNR, in fact it seems to register some 60 second exposures just fine too. I don't see any real problem with star elongation either. Both of these were suggested as possible solutions elsewhere.
Does anyone have any tips or suggestions of what to try next before I try manually stacking? Because that process just sucks.
