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 3°46' to the north of Mars. The Moon will be 2 days old.

From Fairfield, the pair will become visible around 20:45 (EST) as the dusk sky fades, 12° above your western horizon. They will then sink towards the horizon, setting 1 hour and 36 minutes after the Sun at 21:59.

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 -9.5, and Mars at mag 1.8, both in the constellation Leo.

The pair will be too widely separated to fit within the field of view of a telescope, but will be visible to the naked eye or through a pair of binoculars.

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 09h26m30s +20°05' Leo -9.5 30'38"2
Mars 09h26m30s +16°18' Leo 1.8 3"7

The coordinates above are given in J2000.0. The pair will be at an angular separation of 28° from the Sun, which is in Gemini at this time of year.

The sky on 12 July 2021
Sunrise
05:31
Sunset
20:26
Twilight ends
22:28
Twilight begins
03:28

2-day old moon
Waxing Crescent

5%

2 days old

Planets
Rise Culm. Set
Mercury 04:08 11:34 19:01
Venus 07:52 14:56 22:01
Moon 08:03 15:16 22:29
Mars 07:55 14:58 22:00
Jupiter 22:22 03:46 09:06
Saturn 21:27 02:28 07:26
All times shown in EDT.

Source

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

13 Oct 2020  –  Mars at opposition
12 Jul 2021  –  Mars at aphelion
20 Sep 2021  –  Mars at apogee
08 Oct 2021  –  Mars at solar conjunction

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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