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Conjunction of the Moon and Mars

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

The Moon and Mars will share the same right ascension, with the Moon passing 5°43' to the north of Mars. The Moon will be 3 days old.

From Ashburn, the pair will become visible around 17:09 (EST) as the dusk sky fades, 27° above your south-western horizon. They will then sink towards the horizon, setting 3 hours and 23 minutes after the Sun at 20:12.

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 -10.7 in the constellation Aquarius, and Mars at mag 1.1 in the neighbouring constellation of Capricornus.

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 Mars 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 21h13m40s -11°33' Aquarius -10.7 32'43"1
Mars 21h13m40s -17°17' Capricornus 1.1 4"8

The coordinates above are given in J2000.0. The pair will be at an angular separation of 44° from the Sun, which is in Sagittarius at this time of year.

The sky on 25 December 2014
Twilight ends
Twilight begins

3-day old moon
Waxing Crescent


3 days old

Rise Culm. Set
Mercury 08:18 12:53 17:28
Venus 08:34 13:16 17:57
Moon 10:08 15:38 21:08
Mars 10:04 15:09 20:14
Jupiter 20:37 03:34 10:27
Saturn 04:46 09:47 14:49
All times shown in EST.


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

12 Dec 2014  –  Mars at perihelion
14 Jun 2015  –  Mars at solar conjunction
11 Jul 2015  –  Mars at apogee
20 Nov 2015  –  Mars at aphelion

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