Internet Based
Moon Phase Calculator

                         time: ad2012-feb-05   18:07:20 UT+00h00m
                  day of week: sun
                          MJD: +00055962.755093
                           JD: +02455963.255093
                            t: +00004052.755093
                mean lunation: +001102.44362403
              mean moon phase: 159.70465°
                            ~ full moon
   ecliptic longitude of moon: 109.4°
    ecliptic latitude of moon: -3.0°
  horizontal parallax of moon: 00.949°
  geocentric distance of moon: 384975 km
    ecliptic longitude of sun: 316.3°
     ecliptic latitude of sun: 00.0°
   geocentric distance of sun: 147493548 km
ecliptic longitude difference: 153.0°

To calculate past or future moon phases, enter date and time below and click "calculate".
For the current moon phase, leave the input box blank and click "calculate".


Underlying algorithm was produced in a way that it should not contain errors.
It has been tested about 5 times on random dates between 6000BC and 10000AD.
All results of these tests agreed exactly with standard tables.
-author, August 2, 2001

back to the Moonstick Information Site