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 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 6°09' to the north of Mars. The Moon will be 1 days old.

From Cambridge, the pair will be difficult to observe as they will appear no higher than 8° above the horizon. They will become visible around 17:29 (EDT) as the dusk sky fades, 8° above your western horizon. They will then sink towards the horizon, setting 1 hour and 13 minutes after the Sun at 18:22.

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 -8.6, and Mars at mag 1.2, both in the constellation 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 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 22h37m30s -03°33' Aquarius -8.6 31'47"6
Mars 22h37m30s -09°43' Aquarius 1.2 4"0

The coordinates above are given in J2000.0. The pair will be at an angular separation of 17° from the Sun, which is in Capricornus at this time of year.

The sky on 11 February 2013
Twilight ends
Twilight begins

1-day old moon
Waxing Crescent


1 day old

Rise Culm. Set
Mercury 07:29 13:03 18:36
Venus 06:22 11:16 16:09
Moon 07:10 13:03 18:56
Mars 07:28 12:55 18:23
Jupiter 11:10 18:35 02:03
Saturn 23:38 04:57 10:12
All times shown in EST.


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 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

24 Jan 2013  –  Mars at perihelion
17 Apr 2013  –  Mars at solar conjunction
04 Jun 2013  –  Mars at apogee
02 Jan 2014  –  Mars at aphelion

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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