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 1.0140 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 1.0117 AU from the Sun, and the Moon will lie at a distance of 1.0142 AU from the Sun.

This distance between the Earth and Moon will be 0.0025 AU (374,000 km).

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

Object Right Ascension Declination Constellation Angular Size
The Moon 20h47m50s 22°26'S Capricornus 31'55"
Sun (centre) 10h00m +12°13' Leo 31'37"

The coordinates above are given in J2000.0.

The sky on 20 August 2021
Sunrise
06:16
Sunset
19:28
Twilight ends
20:56
Twilight begins
04:48

12-day old moon
Waxing Gibbous

98%

12 days old

Planets
Rise Culm. Set
Mercury 07:39 13:58 20:18
Venus 09:13 15:12 21:11
Moon 18:45 23:55 05:14
Mars 07:33 13:54 20:16
Jupiter 19:26 00:52 06:19
Saturn 18:22 23:34 04:46
All times shown in PDT.

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

15 Aug 2021  –  Moon at First Quarter
22 Aug 2021  –  Full Moon
30 Aug 2021  –  Moon at Last Quarter
06 Sep 2021  –  New Moon

Image credit

Simulated image courtesy of Tom Ruen.

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