You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
23 lines
1.1 KiB
23 lines
1.1 KiB
<sect2 id="calc-precess">
|
|
<title>Precession module</title>
|
|
<indexterm><primary>Tools</primary>
|
|
<secondary>Astrocalculator</secondary>
|
|
<tertiary>Precession module</tertiary>
|
|
</indexterm>
|
|
|
|
<screenshot>
|
|
<screeninfo>The Precession calculator module </screeninfo>
|
|
<mediaobject>
|
|
<imageobject>
|
|
<imagedata fileref="calc-precess.png" format="PNG"/>
|
|
</imageobject>
|
|
<textobject>
|
|
<phrase>Precession</phrase>
|
|
</textobject>
|
|
</mediaobject>
|
|
</screenshot>
|
|
|
|
<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>
|
|
</sect2>
|