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°35' to the south of Mercury. The Moon will be 28 days old.

From Ashburn , the pair will be difficult to observe as they will appear no higher than 11° above the horizon. They will be visible in the dawn sky, rising at 05:46 (EST) – 1 hour and 40 minutes before the Sun – and reaching an altitude of 11° above the south-eastern horizon before fading from view as dawn breaks at around 07:00.

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The Moon will be at mag -9.3, and Mercury at mag -0.3, both in the constellation Ophiuchus.

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 17h40m30s 27°55'S Ophiuchus -9.3 32'05"1
Mercury 17h40m30s 21°19'S Ophiuchus -0.3 7"0

The coordinates above are given in J2000.0. The pair will be at an angular separation of 23° from the Sun, which is in Sagittarius at this time of year.

The sky on 9 Jan 2024

The sky on 9 January 2024
Twilight ends
Twilight begins

28-day old moon
Waning Crescent


28 days old

Rise Culm. Set
Mercury 05:45 10:35 15:25
Venus 04:50 09:42 14:33
Moon 05:55 10:26 14:55
Mars 06:31 11:10 15:48
Jupiter 12:24 19:07 01:51
Saturn 09:54 15:19 20:43
All times shown in EST.


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.

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24 Mar 2024  –  Mercury at highest altitude in evening sky
24 Mar 2024  –  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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