Flexture point5/9/2023 If the star trails are reasonably straight lines and all are parallel to one another, Examine the resulting stacked image you will see trailed stars all over the frame.Stack all of your raw subs without first aligning the star fields.There is a very simple test to determine whether you are dealing with differential flexure or field rotation due to polar alignment error. If the mount is not well polar aligned and you are guiding perfectly on the guide star, you may experience field rotation during your imaging session resulting in oblong stars. It can also be the result of polar alignment error. While differential flexure is the most common cause for oblong stars when guiding looks perfect, it is not the only possible cause. I have done 5 and 10 min subs in the past with this setup without the issue which is why I’m thinking I must have had something new hardware wise creep-in but I won’t rule out any possibilities.ĮDIT - Corrected the dropbox link, corrected the JPG version so it shows up hereĮdited by rottielover, 15 September 2019 - 06:18 PM. I'm using a piggy backed guidescope a 60mm Stellavue with my ES127ed that has a flattener reducer on it giving me a final Focal Length of 667mm on the main scope.Īny suggestions on recovery of this data? Any suggestions as to what the issue with my data could be (as I said it would appear to be a hardware issue for me, but I'm not sure). I have had to move my mount between front and backyards a couple of times in recent days, but I doubled checked this morning and everything is tightened down well. I've never had this issue crop up before now. ![]() The guiding looked really good last night and was sub-pixel guiding. But my 10 min subs came out with some wonky oblong stars. After slewing around (see what I did there) for a while I finally decided to start grabbing data on the Witches Broom. Last night I was trying to grab some narrowband data.
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