astro_search_moon_phase

Searches for the time when the Moon reaches a specified phase angle.

Provides access to the 'Astronomy Engine' C library
(<https://github.com/cosinekitty/astronomy>) by Don Cross. The library
calculates positions of the Sun, Moon, and planets, and predicts
astronomical events such as rise/set times, lunar phases, equinoxes,
solstices, eclipses, and transits. It is based on the 'VSOP87' planetary
model and is accurate to within approximately one arcminute. This package
bundles the single-file C source so that other R packages can link against
it via 'LinkingTo' without shipping their own copy.

Mitchell O'Hara-Wild

astronomyengine

R Bindings to the 'Astronomy Engine' C Library

Don Cross

astro_search_moon_phase function

<dl><dt>target_lon</dt>
<dd>A numeric value in the range [0, 360) representing the
target phase angle. Common values: 0 = new moon, 90 = first quarter,
180 = full moon, 270 = third quarter.</dd>
<dt>start_time</dt>
<dd>A POSIXct datetime to begin the search.</dd>
<dt>limit_days</dt>
<dd>A numeric value specifying the search window in days.
Positive values search forward, negative values search backward.</dd></dl>

Arguments

Search for a Specific Moon Phase — astro_search_moon_phase

<dl>

<dt>target_lon</dt>
<dd>A numeric value in the range [0, 360) representing the
target phase angle. Common values: 0 = new moon, 90 = first quarter,
180 = full moon, 270 = third quarter.</dd>


<dt>start_time</dt>
<dd>A POSIXct datetime to begin the search.</dd>


<dt>limit_days</dt>
<dd>A numeric value specifying the search window in days.
Positive values search forward, negative values search backward.</dd>

</dl>

astro_search_moon_phase: Search for a Specific Moon Phase

Description

Usage

Value

Arguments

Examples