The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.

Conjunction of the Moon and Jupiter

Fri, 17 Aug 2018 at06:39 EDT(208 days away)
10:39 UTC

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

The Moon and Jupiter will share the same right ascension, with the Moon passing 4°30' to the north of Jupiter. The Moon will be 6 days old.

At around the same time, the two objects will also make a close approach, technically called an appulse.

From Ashburn (click to change), the pair will become visible at around 20:18 (EST) as the dusk sky fades, 28° above your south-western horizon. They will then sink towards the horizon, setting 3 hours and 28 minutes after the Sun at 23:27.

The Moon will be at mag -11.6, and Jupiter at mag -2.0, both in the constellation Libra.

The pair 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.

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

The positions of the two objects at the moment of conjunction will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
The Moon 14h51m40s -11°00' Libra -11.6 30'47"8
Jupiter 14h51m40s -15°30' Libra -2.0 35"3

The coordinates above are given in J2000.0. The pair will be at an angular separation of 79° from the Sun, which is in Leo at this time of year.

The sky on 17 August 2018
Sunrise 06:23
Sunset 20:01
Twilight ends
Twilight begins

6-day old moon
Age of Moon
6 days

All times shown in EDT.
Rise Culm. Set
Mercury 05:26 12:17 19:08
Venus 10:16 16:01 21:46
Moon 13:20 18:41 00:02
Mars 19:06 23:34 04:06
Jupiter 13:05 18:17 23:28
Saturn 16:51 21:35 02:23


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.

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08 May 2018, 20:28 EDT  –  Jupiter at opposition
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14 Jul 2020, 03:48 EDT  –  Jupiter at opposition
19 Aug 2021, 20:18 EDT  –  Jupiter at opposition

Image credit

The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.




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