Re: Reported RA/Dec of target changes with image rotation

Posted by karenacollins on Apr 17, 2021; 9:59am
URL: http://astroimagej.170.s1.nabble.com/Reported-RA-Dec-of-target-changes-with-image-rotation-tp1553p1554.html

The rotate image capability is a feature of the underlying ImageJ software. It is unfortunately not WCS header aware and will not adjust the RA and Decs after a rotate. You would need to plate-solve the image again after rotation, if you want to replace the WCS header information with corrected WCS information. We realize that can be a time-consuming effort for large image stacks, so hopefully someday we will have time to make the rotate feature WCS header aware.

In case you are not aware, if you just want to invert the image display in the X and/or Y axes, but not actually change the underlying image, use the Image_Menus > View > Invert options. Using these options, the displayed image will flip accordingly, and RA and Dec will display properly in any resulting image orientation.

Karen