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Conjunction of the Moon and Jupiter

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°13' to the north of Jupiter. The Moon will be 10 days old.

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

From Cambridge, the pair will be visible in the evening sky, becoming accessible around 20:46 (EDT) as the dusk sky fades, 32° above your southern horizon. They will then reach its highest point in the sky at 21:22, 32° above your southern horizon. They will continue to be observable until around 01:43, when they sink below 7° above your south-western horizon.

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The Moon will be at mag -12.3, and Jupiter at mag -2.4, 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 14h45m30s -10°35' Libra -12.3 30'21"2
Jupiter 14h45m30s -14°48' Libra -2.4 41"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 130° from the Sun, which is in Gemini at this time of year.

The sky on 23 June 2018
Twilight ends
Twilight begins

10-day old moon
Waxing Gibbous


10 days old

Rise Culm. Set
Mercury 06:31 14:09 21:47
Venus 08:16 15:34 22:52
Moon 16:15 21:36 02:26
Mars 22:51 03:30 08:05
Jupiter 16:15 21:22 02:34
Saturn 20:26 01:05 05:40
All times shown in EDT.


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
26 Nov 2018  –  Jupiter at solar conjunction
10 Jun 2019  –  Jupiter at opposition
27 Dec 2019  –  Jupiter at solar conjunction

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