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Full Moon

Dominic Ford, Editor
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The sky at

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 second to fall in winter 2021 – the Wolf Moon.

Over the nights following 28 January, 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 +21°50' in the constellation Cancer , and so will appear highest in the northern hemisphere. It will be visible from all latitudes south of 58°S. Its distance from the Earth will be 381,000 km.

The exact position of the Moon at the time it reaches full phase will be:

Object Right Ascension Declination Constellation Angular Size
The Moon 08h49m20s +21°50' Cancer 31'18"

The coordinates above are given in J2000.0.

The sky on 28 January 2021
Twilight ends
Twilight begins

15-day old moon
Waxing Gibbous


15 days old

Rise Culm. Set
Mercury 07:43 13:02 18:21
Venus 06:20 10:59 15:37
Moon 16:57 00:22 07:04
Mars 10:37 17:42 00:47
Jupiter 07:05 11:57 16:50
Saturn 06:51 11:39 16:27
All times shown in EST.


The circumstances of this event were computed using the DE405 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.

Related news

28 Jan 2021  –  Full Moon
04 Feb 2021  –  Moon at Last Quarter
11 Feb 2021  –  New Moon
19 Feb 2021  –  Moon at First Quarter

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