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The Moon at perihelion

Dominic Ford, Editor
From the Moon feed

Objects: The Moon
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The Moon's monthly orbit around the Earth will carry it to its closest point to the Sun – its perihelion – at a distance of 1.0110 AU from the Sun.

This happens at around the time when the Moon's orbit carries it between the Sun and the Earth, at around the same time that it passes new moon.

At the moment of the Moon's perihelion, the Earth will lie at a distance of 1.0133 AU from the Sun, and the Moon will lie at a distance of 1.0109 AU from the Sun.

This distance between the Earth and Moon will be 0.0024 AU (361,000 km).

The exact positions of the Sun and Moon in the sky will be:

Object Right Ascension Declination Constellation Angular Size
The Moon 10h47m20s +10°50' Leo 32'59"
Sun (centre) 09h28m +14°53' Leo 31'34"

The coordinates above are given in J2000.0.

The sky on 12 August 2018
Twilight ends
Twilight begins

1-day old moon
Waxing Crescent


1 day old

Rise Culm. Set
Mercury 06:01 12:45 19:30
Venus 10:12 16:05 21:58
Moon 07:52 14:32 21:11
Mars 19:30 23:58 04:31
Jupiter 13:24 18:35 23:47
Saturn 17:12 21:57 02:45
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

12 Aug 2018  –  The Moon at perihelion
18 Aug 2018  –  Moon at First Quarter
23 Aug 2018  –  The Moon at apogee
24 Aug 2018  –  The Moon at aphelion

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