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The Moon at aphelion

Dominic Ford, Editor
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The Moon's monthly orbit around the Earth will carry it to its furthest point from the Sun – its aphelion – at a distance of 0.9937 AU from the Sun.

This happens at around the time when the Moon's orbit carries it around the far side of the Earth as seen from the Sun, at around the same time that it passes full moon.

At the moment of the Moon's perihelion, the Earth will lie at a distance of 0.9916 AU from the Sun, and the Moon will lie at a distance of 0.9941 AU from the Sun.

This distance between the Earth and Moon will be 0.0025 AU (378,000 km).

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

Object Right Ascension Declination Constellation Angular Size
The Moon 12h58m50s -01°24' Virgo 31'32"
Sun (centre) 22h59m -06°29' Aquarius 32'15"

The coordinates above are given in J2000.0.

The sky on 04 March 2018
Twilight ends
Twilight begins

17-day old moon
Waning Gibbous


17 days old

Rise Culm. Set
Mercury 07:11 13:09 19:06
Venus 07:17 13:10 19:03
Moon 21:31 02:21 08:19
Mars 02:32 06:45 10:59
Jupiter 23:56 04:43 09:27
Saturn 03:34 07:51 12:08
All times shown in PST.


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

01 Mar 2018, 16:53 PST  –  Full Moon
09 Mar 2018, 03:21 PST  –  Moon at Last Quarter
17 Mar 2018, 06:13 PDT  –  New Moon
24 Mar 2018, 08:36 PDT  –  Moon at First Quarter

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