Simulated image courtesy of Tom Ruen.

Moon at Last Quarter

Dominic Ford, Editor
From the Moon feed

Objects: The Moon
Please wait
Loading 0/4
Click and drag to rotate
Mouse wheel to zoom in/out
Touch with mouse to dismiss
The sky at

Elsewhere in the world, the Moon will be visible in the dawn sky.

From Fairfield (click to change) however, it will be visible from soon after it rises, at 00:23, until soon before it sets at 11:25.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

At this time in its monthly cycle of phases, it appears almost exactly half illuminated.

The Moon orbits the Earth once every four weeks, causing its phases to cycle through new moon, first quarter, full moon, last quarter, and back to new moon once every 29.5 days.

As it progresses through this cycle, it is visible at different times of day. At last quarter, it rises in the middle of the night and appears high in the sky by dawn. It sets at around lunchtime. More information about the Moon's phases is available here.

Observing the Moon at last quarter

Over coming days, the Moon will rise later each day, so that it is visible for less time before sunrise and rises less far above the eastern horizon before dawn. By the time it reaches new moon, it will rise at around dawn and set at around dusk, making it visible only during the daytime.

Its daily progress is charted below, with all times are given in Fairfield local time.

Date Sun
rises at
rises at
Altitude of Moon
at sunrise
Direction of Moon
at sunrise
22 Jan 201907:1017:3712°west
23 Jan 201907:1018:5320°west
24 Jan 201907:0920:0827°west
25 Jan 201907:0821:2132°south-west
26 Jan 201907:0722:3236°south-west
27 Jan 201907:0723:4037°south-west
28 Jan 201907:0600:4636°south
29 Jan 201907:0501:5033°south
30 Jan 201907:0402:5129°south
31 Jan 201907:0303:5024°south-east
01 Feb 201907:0204:4518°south-east
02 Feb 201907:0105:3512°south-east

The exact moment of last quarter

The exact moment of last quarter is defined as the time when the Moon's ecliptic longitude is exactly 90° away from the Sun's ecliptic longitude, as observed from the center of the Earth. However, the Moon does not appear in any way special at this instant in time, and a last quarter moon can be observed at any time in the pre-dawn sky.

At the moment it reaches last quarter, the Moon's distance from the Earth will be 382,000 km. Its celestial coordinates will be as follows:

Object Right Ascension Declination Constellation Angular Size
The Moon 14h26m50s 9°03'S Libra 31'15"

The coordinates above are given in J2000.0.

The sky on 27 Jan 2019

The sky on 27 January 2019
Twilight ends
Twilight begins

21-day old moon
Waning Crescent


21 days old

Rise Culm. Set
Mercury 07:14 12:00 16:45
Venus 04:03 08:50 13:38
Moon 23:40 05:31 11:14
Mars 10:02 16:30 22:58
Jupiter 03:49 08:29 13:09
Saturn 05:48 10:28 15:07
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.

Related news

27 Jan 2019  –  Moon at Last Quarter
04 Feb 2019  –  New Moon
12 Feb 2019  –  Moon at First Quarter
19 Feb 2019  –  Full Moon

Image credit

Simulated image courtesy of Tom Ruen.






Color scheme