<para>This module is similar to the <link linkend="calc-apcoords">Apparent Coordinates module</link>, but it only applies the effect of <link linkend="ai-precession">precession</link>, not of nutation or aberration. </para>
<para>To use the module, first enter the input coordinates and their epoch in the <guilabel>Original Coordinates</guilabel> section. You must also fill in the target epoch in the <guilabel>Precessed Coordinates</guilabel> section. Then, press the <guibutton>Compute</guibutton> button, and the object's coordinates, precessed to the target Epoch, are presented in the <guilabel>Precessed Coordinates</guilabel> section. </para>
