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Close approach of the Moon and Jupiter

Dominic Ford, Editor
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The sky at

The Moon and Jupiter will make a close approach, passing within 4°13' of each other. The Moon will be 8 days old.

From Seattle, the pair will become visible around 21:22 (PST) as the dusk sky fades, 24° above your southern horizon. They will then sink towards the horizon, setting at 00:59.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

The Moon will be at mag -12.1; and Jupiter will be at mag -2.2. Both objects will lie in the constellation Libra.

They will be too widely separated to fit within the field of view of a telescope, but will be visible to the naked eye or through a pair of binoculars.

At around the same time, the pair will also share the same right ascension – called a conjunction.

A graph of the angular separation between the Moon and Jupiter around the time of closest approach is available here.

The positions of the pair at the moment of closest approach will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
The Moon 14h49m40s -10°49' Libra -12.1 30'28"8
Jupiter 14h44m20s -14°50' Libra -2.2 38"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 105° from the Sun, which is in Cancer at this time of year.

The sky on 20 July 2018
Twilight ends
Twilight begins

7-day old moon
Waxing Gibbous


7 days old

Rise Culm. Set
Mercury 07:53 14:50 21:48
Venus 09:30 16:09 22:48
Moon 14:50 20:05 00:55
Mars 21:50 01:57 05:59
Jupiter 15:03 19:59 00:59
Saturn 19:15 23:31 03:51
All times shown in PDT.


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

08 May 2018  –  Jupiter at opposition
25 Nov 2018  –  Jupiter at solar conjunction
10 Jun 2019  –  Jupiter at opposition
27 Dec 2019  –  Jupiter at solar conjunction

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