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 Moon and Mercury will share the same right ascension, with the Moon passing 5°06' 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 8° above the horizon. They will be visible in the dawn sky, rising at 04:51 (EDT) – 1 hour and 13 minutes before the Sun – and reaching an altitude of 8° above the north-eastern horizon before fading from view as dawn breaks around 05:44.

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The Moon will be at mag -8.1, and Mercury at mag -1.0, both in the constellation Gemini.

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 07h15m40s +17°16' Gemini -8.1 29'31"7
Mercury 07h15m40s +22°22' Gemini -1.0 5"8

The coordinates above are given in J2000.0. The pair will be at an angular separation of 15° from the Sun, which is in Cancer at this time of year.

The sky on 25 July 2014
Twilight ends
Twilight begins

28-day old moon
Waning Crescent


28 days old

Rise Culm. Set
Mercury 04:51 12:12 19:34
Venus 04:09 11:33 18:56
Moon 05:12 12:13 19:15
Mars 13:22 18:44 00:10
Jupiter 06:00 13:13 20:25
Saturn 14:39 19:54 01:12
All times shown in EDT.


Never attempt to point a pair of binoculars or a telescope at an object close to the Sun. Doing so may result in immediate and permanent blindness.


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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31 Oct 2014  –  Mercury reaches highest point in morning sky

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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