A slow directional shift of the earth' axis that required 260.000! years to complete called

In particular, it can refer to the gradual shift in the orientation of Earth's axis of rotation in a cycle of approximately 26,000 years. This is similar to the procession of a spinning-top, with the axis The term "procession" typically refers only to this largest part of the motion; other changes in the alignment of Earth's axis - notation and polar motion - are much smaller in magnitude.