Re: coordinates of the target/comparison stars

Posted by guy on Jul 06, 2017; 4:50pm
URL: http://astroimagej.170.s1.nabble.com/coordinates-of-the-target-comparison-stars-tp707p712.html

Hi Karen,

Thanks a lot for your answer ! If I understand well, when the option "Reposition aperture to object centroid" is enabled, the tolerance for field shift or rotation from one image to the next is exactly equal to one aperture radius : so if the user is concerned with image movements higher than that, he may choose to slightly increase the "Radius of object aperture" parameter, and/or to defocus if the object is bright enough.

Guy