Maybe you already know, but while Ekos reports guiding error in arcseconds, PHD2 reports it primarily in pixels, and in arcseconds in parenthesis; so be sure to check arcseconds with arcseconds.

Maybe you only wrote it wrong, but to be clear: it's not "close to the horizon", it's "close to the celestial equator" (i.e. close to Dec = 0).

HTH
Matteo

Read More...