15. tammikuuta 2014

Full Moon

Quote: "The date and approximate time of a specific full moon (assuming a circular orbit) can be calculated from the following equation:

$d = 20.362955 + 29.530588861 \times N + 102.026 \times 10^{-12} \times N^2$
where d is the number of days since 1 January 2000 00:00:00 in the Terrestrial Time scale used in astronomical ephemerides; for Universal Time (UT) add the following approximate correction to d:
$-0.000739 - (235 \times 10^{-12})\times N^2$ days
where N is the number of full moons since the first full moon of 2000. The true time of a full moon may differ from this approximation by up to about 14.5 hours as a result of the non-circularity of the moon's orbit." (Wikipedia, 15.1.2014)

Good luck on your calculations! I better go out and start howling!

 See - up in the sky!?