THE SMART TRICK OF EPOCH TIMES DEUTSCH THAT NOBODY IS DISCUSSING

Celestial coordinate techniques mostly used in astronomy are equatorial coordinates and ecliptic coordinates. These are generally outlined relative for the (shifting) vernal equinox situation, which by itself is set from the orientations of the Earth's rotation axis and orbit across the Sun. Their orientations vary (even though slowly and gradually

If enough time big difference is tiny, then relatively simple and small corrections to the precession might suffice. If some time difference will get big, then fuller plus much more correct corrections have to be utilized. Because of this, a star position read through from the star atlas or catalog based on a adequately outdated equinox and equator