On Sun, May 11, 2025 at 03:04 PM, Art Trail wrote:
Paul, that is checked. As it used to be. I would think that it should stay that way? Or am I wrong.
"Gemini Calculate Refraction" in also checked. Is that OK?
?
Thanks,
?
Art
?
There's no way for me to tell if that's right or wrong for your setup, as it depends on the mix of software and drivers and all of their individual configurations. Since the error sounds within the bounds of what a J2000 to JNow precession calculation might produce, try unchecking it and see if it solves the problem. "Gemini calculates refraction" is also usually OK, but this will not cause a 1 arcminute error, especially if you're pointing 15-20 degrees above the horizon. That setting also depends on whether your software already calculates refraction in the coordinates sent to Gemini. If that's the case, you'll want to turn off that setting, also.
Paul Kanevsky