For North Americans the Moon will be fullest and closest during midday on Friday the 12th. But the difference will be barely noticeable during the two nights on either side, so in essence we’ll be seeing the effect twice. The Moon will be in opposition from the Sun on December 12 at 16:37 UT, and I calculate geocentric maximum illumination of 99.9% for 17:02 UT. Geocentric perigee of 356,566 km will occur on the 12th at 21:40 UT.
I’ve created a panoramic graphic that illustrates the declinations, distances and apparent angular diameters of the next 15 Full Moons. Since the distances between Earth and Full Moons repeat within a cycle of about 14 synodic months, the graphic shows a complete cycle with the Full Moon near perigee at each end. It can be seen by clicking: http://www.curtrenz.com/astronomical.html
Photos and descriptions of this month’s Full Moon would be welcome additions to this thread.
For astronomical graphics, including
monthly wallpaper calendar, visit: