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 Mercury

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

The Moon and Mercury will share the same right ascension, with the Moon passing 6°56' to the north of Mercury. The Moon will be 2 days old.

From Seattle , the pair will be visible from soon after it rises, at 08:33, until soon before it sets at 20:47. Always take extreme caution when trying to make daytime observations of the Moon while the Sun is above the horizon.

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 -9.0, and Mercury at mag 0.6, both in the constellation Leo.

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

A graph of the angular separation between the Moon and Mercury 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 11h19m10s 7°50'N Leo -9.0 29'28"1
Mercury 11h19m10s 0°53'N Leo 0.6 8"7

The coordinates above are given in J2000.0. The pair will be at an angular separation of 22° from the Sun, which is in Leo at this time of year.

The sky on 18 Aug 2023

The sky on 18 August 2023
Twilight ends
Twilight begins

2-day old moon
Waxing Crescent


2 days old

Rise Culm. Set
Mercury 08:34 14:40 20:47
Venus 05:50 12:29 19:08
Moon 08:16 14:58 21:27
Mars 08:43 15:00 21:17
Jupiter 23:01 06:13 13:25
Saturn 20:38 01:50 07:01
All times shown in PDT.


The circumstances of this event were computed using the DE430 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

09 Aug 2023  –  Mercury at greatest elongation east
22 Sep 2023  –  Mercury at greatest elongation west
23 Sep 2023  –  Mercury at highest altitude in morning sky
04 Dec 2023  –  Mercury at greatest elongation east

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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