Hi all, need a little help on this one and apologies for all the screenshots – not sure it’s a bug, or more likely user error. I have an AP1100 mount, and use local Astrometry.net set to J2000. Using a QSI683; Frame/focus bin2x2. Using Framing and Mosaic Wizard, I framed a target (M96) and created a sequence:
So far, so good, imaging on night 1 goes without a problem and centering the scope goes fine, for example:
On night 2, I’d like to use a night 1 image as a reference because I might nudge the scope from the original F&M setup to get a better guide star. So loading an image taken from night 1 and plate solving, I see:
If I right click and center here, I see this (which is where the problem lies):
Initially I was thinking this is an epoch JNOW/J2000 issue, but because this is a “closed loop” (F&M > Astrometry > My Image > Astrometry > My Image) I didn’t that would be the case. The only other thing that comes to mind is the binning used in F&F. I tried this a few times with the same result, I wasn’t awake enough to try setting Astrometry to JNOW or 1x1 binning.
I did save the F&F image above, and when I plate solve it, I see the plate solver is correct which makes me think it’s not a plate solve issue but binning/image scale issue:
I had another target where I centered on a night 1 frame and noticed the same thing. Any ideas?