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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°14' to the north of Mercury. The Moon will be 28 days old.

From Cambridge however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 3° above the horizon at dawn.

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The Moon will be at mag -9.1 in the constellation Pisces, and Mercury at mag -0.1 in the neighbouring constellation of Aquarius.

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 23h07m20s -01°53' Pisces -9.1 32'32"9
Mercury 23h07m20s -08°08' Aquarius -0.1 5"9

The coordinates above are given in J2000.0. The pair will be at an angular separation of 21° from the Sun, which is in Pisces at this time of year.

The sky on 29 March 2014
Twilight ends
Twilight begins

28-day old moon
Waning Crescent


28 days old

Rise Culm. Set
Mercury 05:53 11:27 17:01
Venus 04:39 09:54 15:09
Moon 05:46 11:49 17:53
Mars 20:01 01:47 07:27
Jupiter 11:29 19:04 02:44
Saturn 22:35 03:42 08:44
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

19 Mar 2014  –  Mercury at aphelion
25 Apr 2014  –  Mercury at superior solar conjunction
02 May 2014  –  Mercury at perihelion
19 May 2014  –  Mercury at dichotomy

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