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Class Acme.Phase

java.lang.Object
   |
   +----Acme.Phase

public class Phase

extends Object

Adapted from "moontool.c" by John Walker, Release 2.0.

Fetch the software.
Fetch the entire Acme package.

Phase()

jtime(Date)

Convert internal date and time to astronomical Julian time (i.e.

phase(double, RefDouble, RefDouble, RefDouble, RefDouble, RefDouble, RefDouble)

Calculate phase of moon as a fraction.

phasehunt5(double, double[])

Find time of phases of the moon which surround the current date.

 public Phase()

 public static double jtime(Date t)

Convert internal date and time to astronomical Julian time (i.e. Julian date plus day fraction, expressed as a double).

 public static void phasehunt5(double sdate,
                               double phases[])

Find time of phases of the moon which surround the current date. Five phases are found, starting and ending with the new moons which bound the current lunation.

 public static double phase(double pdate,
                            RefDouble pphaseR,
                            RefDouble mageR,
                            RefDouble distR,
                            RefDouble angdiaR,
                            RefDouble sudistR,
                            RefDouble suangdiaR)

Calculate phase of moon as a fraction.

Parameters:

pdate - time for which the phase is requested, as from jtime()

pphaseR - Ref for illuminated fraction of Moon's disk

mageR - Ref for age of moon in days

distR - Ref for distance in km from center of Earth

angdiaR - Ref for angular diameter in degrees as seen from Earth

sudistR - Ref for distance in km to Sun

suangdiaR - Ref for Sun's angular diameter

Returns:

terminator phase angle as a fraction of a full circle (i.e., 0 to 1)

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