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New Moon

Dominic Ford, Editor
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The sky at

The Moon will pass close to the Sun and become lost in the Sun's glare for a few days.

The Moon's orbital motion carries it around the Earth once every four weeks, and as a result its phases cycle from new moon, through first quarter, full moon and last quarter, back to new moon once every 29.5 days.

This motion also means that the Moon travels more than 12° across the sky from one night to the next, causing it to rise and set nearly an hour later each day. Click here for more information about the Moon's phases.

At new moon, the Earth, Moon and Sun all lie in a roughly straight line, with the Moon in the middle, appearing in front of the Sun's glare. In this configuration, we see almost exactly the opposite half of the Moon to that which is illuminated by the Sun, making it doubly unobservable because the side we see is unilluminated.

Over coming days, the Moon will rise and set an hour later each day, becoming visible in the late afternoon and dusk sky as a waxing crescent which sets soon after the Sun. By first quarter, in a week's time, it will be visible until around midnight.

Its day-by-day progress is charted below, with all times are given below in Ashburn local time.

Date Sun
sets at
sets at
Altitude of Moon
at sunset
Direction of Moon
at sunset
09 Oct 201818:3818:47-2°west
10 Oct 201818:3719:21west
11 Oct 201818:3519:5310°west
12 Oct 201818:3420:2916°south-west
13 Oct 201818:3221:0721°south-west
14 Oct 201818:3121:4725°south-west
15 Oct 201818:2922:3127°south

At the moment of closest approach, it will pass within 4°48'of the Sun, in the constellation Virgo. The exact positions of the Sun and Moon will be:

Object Right Ascension Declination Constellation Angular Size
The Moon 13h04m40s -01°41' Virgo 32'04"
Sun (centre) 12h57m -06°07' Virgo 32'01"

The coordinates above are given in J2000.0.

The sky on 08 October 2018
Twilight ends
Twilight begins

29-day old moon
Waning Crescent


29 days old

Rise Culm. Set
Mercury 08:16 13:43 19:10
Venus 09:35 14:22 19:09
Moon 06:34 12:40 18:47
Mars 15:59 20:49 01:40
Jupiter 10:22 15:24 20:27
Saturn 13:29 18:13 22:57
All times shown in EDT.


Never attempt to point a pair of binoculars or a telescope at an object close to the Sun. Doing so may result in immediate and permanent blindness.


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

08 Oct 2018, 23:48 EDT  –  New Moon
16 Oct 2018, 14:03 EDT  –  Moon at First Quarter
24 Oct 2018, 12:47 EDT  –  Full Moon
31 Oct 2018, 12:42 EDT  –  Moon at Last Quarter

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