The Moon will reach full phase. At this time in its monthly cycle of phases, the Moon lies almost directly opposite the Sun in the sky, placing it high above the horizon for much of the night.
The sequence of full moons through the year are often assigned names according to the seasons in which they fall. This month's will be the first to fall in winter 2020 – the Old Moon.
Over the nights following 29 December, the Moon will rise around an hour later each day, becoming prominent later in the night. Within a few days, it will only be visible in the pre-dawn and early-morning sky. By the time it reaches last quarter, a week after full moon, it will rise at around midnight and set at around noon.
At the exact moment when the Moon reaches full phase, it will lie at a declination of +24°51' in the constellation Gemini , and so will appear highest in the northern hemisphere. It will be visible from all latitudes south of 55°S. Its distance from the Earth will be 392,000 km.
The exact position of the Moon at the time it reaches full phase will be:
|Object||Right Ascension||Declination||Constellation||Angular Size|
The coordinates above are given in J2000.0.
|The sky on 29 December 2020|
15 days old
All times shown in EST.
The circumstances of this event were computed using the DE430 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).
This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.
|29 Dec 2020||– Full Moon|
|06 Jan 2021||– Moon at Last Quarter|
|09 Jan 2021||– The Moon at perigee|
|12 Jan 2021||– The Moon at perihelion|
Simulated image courtesy of Tom Ruen.