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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 1.0108 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 1.0086 AU from the Sun, and the Moon will lie at a distance of 1.0112 AU from the Sun.

This distance between the Earth and Moon will be 0.0026 AU (394,000 km).

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

Object Right Ascension Declination Constellation Angular Size
The Moon 20h50m40s -16°24' Capricornus 30'15"
Sun (centre) 10h50m +07°23' Leo 31'42"

The coordinates above are given in J2000.0.

The sky on 03 September 2017
Twilight ends
Twilight begins

13-day old moon
Waxing Gibbous


13 days old

Rise Culm. Set
Mercury 05:41 12:17 18:53
Venus 04:03 11:07 18:11
Moon 18:17 23:28 03:42
Mars 05:36 12:22 19:09
Jupiter 10:03 15:41 21:19
Saturn 14:51 19:37 00:28
All times shown in EDT.


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

29 Aug 2017, 04:14 EDT  –  Moon at First Quarter
06 Sep 2017, 03:04 EDT  –  Full Moon
13 Sep 2017, 02:26 EDT  –  Moon at Last Quarter
20 Sep 2017, 01:31 EDT  –  New Moon

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