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The Moon at perihelion

Dominic Ford, Editor
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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 1.0132 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 1.0155 AU from the Sun, and the Moon will lie at a distance of 1.0131 AU from the Sun.

This distance between the Earth and Moon will be 0.0024 AU (363,000 km).

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

Object Right Ascension Declination Constellation Angular Size
The Moon 04h32m30s +17°32' Taurus 32'52"
Sun (centre) 05h23m +23°10' Taurus 31'29"

The coordinates above are given in J2000.0.

The sky on 12 June 2018
Twilight ends
Twilight begins

28-day old moon
Waning Crescent


28 days old

Rise Culm. Set
Mercury 05:33 13:18 21:02
Venus 07:51 15:24 22:56
Moon 04:29 11:36 18:42
Mars 23:25 04:06 08:44
Jupiter 17:00 22:07 03:18
Saturn 21:11 01:51 06:26
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

06 Jun 2018, 14:33 EDT  –  Moon at Last Quarter
13 Jun 2018, 15:45 EDT  –  New Moon
20 Jun 2018, 06:52 EDT  –  Moon at First Quarter
28 Jun 2018, 00:54 EDT  –  Full Moon

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