Simulated image courtesy of Tom Ruen.

The Moon at aphelion

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 furthest point from the Sun – its aphelion – at a distance of 1.0069 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 1.0047 AU from the Sun, and the Moon will lie at a distance of 1.0072 AU from the Sun.

This distance between the Earth and Moon will be 0.0026 AU (381,000 km).

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

Object Right Ascension Declination Constellation Angular Size
The Moon 22h06m30s 16°58'S Aquarius 31'15"
Sun (centre) 11h44m +01°42' Virgo 31'50"

The coordinates above are given in J2000.0.

The sky on 18 September 2021
Sunrise
06:38
Sunset
18:58
Twilight ends
20:34
Twilight begins
05:02

11-day old moon
Waxing Gibbous

96%

11 days old

Planets
Rise Culm. Set
Mercury 08:54 14:17 19:39
Venus 10:18 15:24 20:31
Moon 18:20 23:30 04:52
Mars 07:09 13:11 19:14
Jupiter 17:37 22:47 03:57
Saturn 16:46 21:38 02:31
All times shown in EDT.

Source

The circumstances of this event were computed using the DE430 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

13 Sep 2021  –  Moon at First Quarter
20 Sep 2021  –  Full Moon
28 Sep 2021  –  Moon at Last Quarter
06 Oct 2021  –  New Moon

Image credit

Simulated image courtesy of Tom Ruen.

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41.14°N
73.26°W
EDT

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