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Full Moon

Dominic Ford, Editor
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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.

This month's full moon will take place unusually close to the time of month when the Moon also makes its closest approach to the Earth – called its perigee. This means the moon will appear slightly larger and brighter than at other times, though any difference is imperceptible to the unaided eye. Perigee full moons such as this occur roughly once every 13 months.

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 third to fall in spring 2031 – the Flower Moon.

Over the nights following 5 June, 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°00' in the constellation Ophiuchus , and so will appear highest in the southern hemisphere. It will be visible from all latitudes north of 58°N. Its distance from the Earth will be 359,000 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 16h52m10s -21°00' Ophiuchus 33'12"

The coordinates above are given in J2000.0.

The sky on 16 October 2019
Twilight ends
Twilight begins

18-day old moon
Waning Gibbous


18 days old

Rise Culm. Set
Mercury 09:16 14:08 18:59
Venus 08:31 13:42 18:54
Moon 20:07 02:26 09:18
Mars 05:48 11:43 17:38
Jupiter 11:53 16:30 21:07
Saturn 13:35 18:14 22:53
All times shown in EDT.


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

05 Jun 2031  –  Full Moon
11 Jun 2031  –  Moon at Last Quarter
19 Jun 2031  –  New Moon
27 Jun 2031  –  Moon at First Quarter

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