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The Moon at perihelion

Mon, 20 Nov 2017 at11:41 EST(62 days ago)
16:41 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 0.9855 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 0.9880 AU from the Sun, and the Moon will lie at a distance of 0.9853 AU from the Sun.

This distance between the Earth and Moon will be 0.0027 AU (405,000 km).

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

Object Right Ascension Declination Constellation Angular Size
The Moon 17h28m30s -19°05' Ophiuchus 29'26"
Sun (centre) 15h44m -19°46' Libra 32'22"

The coordinates above are given in J2000.0.

The sky on 20 November 2017
Sunrise 06:57
Sunset 16:51
Twilight ends
Twilight begins

2-day old moon
Age of Moon
2 days

All times shown in EST.
Rise Culm. Set
Mercury 08:53 13:25 17:57
Venus 05:56 11:07 16:17
Moon 08:44 13:42 18:40
Mars 03:35 09:18 15:02
Jupiter 05:18 10:37 15:55
Saturn 09:09 13:54 18:39


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

18 Nov 2017, 06:44 EST  –  New Moon
26 Nov 2017, 12:04 EST  –  Moon at First Quarter
03 Dec 2017, 10:48 EST  –  Full Moon
10 Dec 2017, 02:53 EST  –  Moon at Last Quarter

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