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module-lunar.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Module: lunar</title>
<script src="scripts/prettify/prettify.js"> </script>
<script src="scripts/prettify/lang-css.js"> </script>
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<link type="text/css" rel="stylesheet" href="styles/prettify-tomorrow.css">
<link type="text/css" rel="stylesheet" href="styles/jsdoc-default.css">
</head>
<body>
<div id="main">
<h1 class="page-title">Module: lunar</h1>
<section>
<header>
</header>
<article>
<div class="container-overview">
<div class="description">Lunar computations for calendars</div>
<dl class="details">
<dt class="tag-version">Version:</dt>
<dd class="tag-version"><ul class="dummy"><li>M2022-02-10</li></ul></dd>
<dt class="tag-author">Author:</dt>
<dd class="tag-author">
<ul>
<li>Louis A. de Fouquières https://github.com/Louis-Aime</li>
</ul>
</dd>
<dt class="tag-license">License:</dt>
<dd class="tag-license"><ul class="dummy"><li>MIT 2016-2022</li></ul></dd>
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="lunar.js.html">lunar.js</a>, <a href="lunar.js.html#line1">line 1</a>
</li></ul></dd>
</dl>
</div>
<h3 class="subsection-title">Requires</h3>
<ul>
<li><a href="module-deltat.html">module:deltat</a></li>
<li>module:time-units.js</li>
<li>module:chronos</li>
<li>module:extdate</li>
</ul>
<h3 class="subsection-title">Methods</h3>
<h4 class="name" id=".getCELunarDate"><span class="type-signature">(static) </span>getCELunarDate<span class="signature">(theDate)</span><span class="type-signature"> → {Object}</span></h4>
<div class="description">
The lunar Milesian era calendar date coordinate at this date, 0h UTC. First day of this calendar is 4 1m 000 First day of this lunar calendar is on 4 1m 000, and is expressed day 1 month 1 year 0.an adjustement to Terrestrial Time (TT) is applied
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>theDate</code></td>
<td class="type">
<span class="param-type">Date</span>
</td>
<td class="description last">UTC date.</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="lunar.js.html">lunar.js</a>, <a href="lunar.js.html#line262">line 262</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
Lunar date {year: number, month: number, day: integer number (1 to 30) }.
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Object</span>
</dd>
</dl>
<h4 class="name" id=".getCEMoonDate"><span class="type-signature">(static) </span>getCEMoonDate<span class="signature">(theDate)</span><span class="type-signature"> → {Object}</span></h4>
<div class="description">
The complete moon date coordinate at this date and time UTC. Moon age may change during a calendar day. Origin morning of 3 1m 000an adjustement to Terrestrial Time (TT) is applied
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>theDate</code></td>
<td class="type">
<span class="param-type">Date</span>
</td>
<td class="description last">UTC date.</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="lunar.js.html">lunar.js</a>, <a href="lunar.js.html#line253">line 253</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
Lunar date with age as a decimal figure {year: integer, month: integer, age: decimal number}.
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Object</span>
</dd>
</dl>
<h4 class="name" id=".getDraconiticNodes"><span class="type-signature">(static) </span>getDraconiticNodes<span class="signature">(theDate)</span><span class="type-signature"> → {Array}</span></h4>
<div class="description">
Estimate dates of caput draconis and of cauda draconis that wrap the given date.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>theDate</code></td>
<td class="type">
<span class="param-type">Date</span>
</td>
<td class="description last">UTC date.</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="lunar.js.html">lunar.js</a>, <a href="lunar.js.html#line323">line 323</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
two dates and a Boolean: caput draconis, cauda draconis (both within same year), and whether eclipse season is running.
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Array</span>
</dd>
</dl>
<h4 class="name" id=".getHegirianLunarDate"><span class="type-signature">(static) </span>getHegirianLunarDate<span class="signature">(theDate)</span><span class="type-signature"> → {Object}</span></h4>
<div class="description">
The lunar "mean" Hegirian calendar date coordinate at this date, 0h UTC. First day of this lunar calendar is on 26 7m 622, and is expressed day 1 month 1 year 1.It corresponds to 1 9 641 of CE lunar calendaran adjustment to Terrestrial Time (TT) is applied
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>theDate</code></td>
<td class="type">
<span class="param-type">Date</span>
</td>
<td class="description last">UTC date.</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="lunar.js.html">lunar.js</a>, <a href="lunar.js.html#line286">line 286</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
Lunar date {{year: number, month: number, date: number (1 to 30)}
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Object</span>
</dd>
</dl>
<h4 class="name" id=".getHegirianMoonDate"><span class="type-signature">(static) </span>getHegirianMoonDate<span class="signature">(theDate)</span><span class="type-signature"> → {Object}</span></h4>
<div class="description">
The complete moon date coordinate at this date and time UTC. Moon age may change during a calendar day. Origin is evening of 25 7m 622an adjustment to Terrestrial Time (TT) is applied
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>
<th class="last">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="name"><code>theDate</code></td>
<td class="type">
<span class="param-type">Date</span>
</td>
<td class="description last">UTC date.</td>
</tr>
</tbody>
</table>
<dl class="details">
<dt class="tag-source">Source:</dt>
<dd class="tag-source"><ul class="dummy"><li>
<a href="lunar.js.html">lunar.js</a>, <a href="lunar.js.html#line273">line 273</a>
</li></ul></dd>
</dl>
<h5>Returns:</h5>
<div class="param-desc">
Lunar date with age as a decimal figure {year: integer, month: integer, age: decimal number}.
</div>
<dl>
<dt>
Type
</dt>
<dd>
<span class="param-type">Object</span>
</dd>
</dl>
<h4 class="name" id=".getLunarDateTime"><span class="type-signature">(static) </span>getLunarDateTime<span class="signature">(theDate)</span><span class="type-signature"> → {Date}</span></h4>
<div class="description">
Lunar date and time is such that the moon is at the same place on the Ecliptic that the sun at that date and time.The moon is rising for lunar dates from 1 1m to 31 6m, falling for lunar dates from 1 7m to last day of the year.
</div>
<h5>Parameters:</h5>
<table class="params">
<thead>
<tr>
<th>Name</th>
<th>Type</th>