  Two papers recently published in Celestial Mechanics (Krasinsky 2006, and
Krasinsky and Vasilyev 2006) have presented a model for Earth-rotation
variations, called ERA-2005, based on numerical integration of a new set of
equations for the rotation of a deformable Earth followed by a fit of the
results of the integration to VLBI data. These papers claimed that this model
was superior to any other existing model. The purpose of this Note is to bring
to light fundamental errors in the derivation of the basic equations of the new
theory, compounded by serious deficiencies in the process of fitting to the
data; they make ERA-2005 unsuitable for consideration as a geophysics-based
model of nutation and precession.
