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The Moon at perihelion

Fri, 22 Sep 2017 at23:37 EDT(62 days ago)
03:37 UTC

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 1.0013 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 1.0035 AU from the Sun, and the Moon will lie at a distance of 1.0008 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 14h17m20s -08°32' Virgo 30'14"
Sun (centre) 12h00m -00°01' Virgo 31'52"

The coordinates above are given in J2000.0.

The sky on 22 September 2017
Sunrise 06:56
Sunset 19:06
Twilight ends
20:36
Twilight begins
05:27

2-day old moon
Age of Moon
2 days

All times shown in EDT.
Rise Culm. Set
Mercury 05:50 12:16 18:42
Venus 04:43 11:24 18:04
Moon 09:22 15:02 20:42
Mars 05:22 11:53 18:25
Jupiter 09:07 14:40 20:13
Saturn 13:39 18:25 23:12

Source

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

20 Sep 2017, 01:31 EDT  –  New Moon
27 Sep 2017, 22:55 EDT  –  Moon at First Quarter
05 Oct 2017, 14:41 EDT  –  Full Moon
12 Oct 2017, 08:27 EDT  –  Moon at Last Quarter

Image credit

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Longitude:
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39.04°N
77.49°W
EST

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