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.
28 lines
1.0 KiB
28 lines
1.0 KiB
<sect2 id="calc-julian">
|
|
<title>Julian Day module</title>
|
|
<indexterm><primary>Tools</primary>
|
|
<secondary>Astrocalculator</secondary>
|
|
<tertiary>Julian Day module</tertiary>
|
|
</indexterm>
|
|
|
|
<screenshot>
|
|
<screeninfo>The Julian Day calculator module </screeninfo>
|
|
<mediaobject>
|
|
<imageobject>
|
|
<imagedata fileref="calc-julian.png" format="PNG"/>
|
|
</imageobject>
|
|
<textobject>
|
|
<phrase>Julian Day</phrase>
|
|
</textobject>
|
|
</mediaobject>
|
|
</screenshot>
|
|
|
|
<para>This module converts between the calendar date, the <link linkend="ai-julianday">Julian Day</link> and the <firstterm>Modified Julian Day</firstterm>. The Modified Julian Day is simply equal to the Julian Day - 2,400,000.5. </para><para>To use the module, select which of the three dates will be the input, and then fill in its value. Then press the <guibutton>Compute</guibutton> button, and the corresponding values for the other two date systems will be displayed. </para>
|
|
|
|
<tip>
|
|
<para>Exercise:</para>
|
|
<para>What calendar date does MJD = 0.0 correspond to? </para>
|
|
</tip>
|
|
|
|
</sect2>
|