Conjunction of Mars and Mercury

Dominic Ford, Editor
From the Conjunctions feed


Mars and Mercury will share the same right ascension, with Mars passing 1°25' to the north of Mercury.

From Cambridge however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be 5° below the horizon at dawn.

Mars will be at mag 1.3 in the constellation Aries, and Mercury at mag 2.4 in the neighbouring constellation of Pisces.

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 Mars 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
Mars 01h54m50s 11°10'N Aries 1.3 3"9
Mercury 01h54m50s 9°44'N Pisces 2.4 11"1

The coordinates above are given in J2000.0. The pair will be at an angular separation of 16° from the Sun, which is in Aries at this time of year.

The sky on 25 Jul 2024

The sky on 25 July 2024
Sunrise
05:27
Sunset
20:10
Twilight ends
22:10
Twilight begins
03:26


Waning Gibbous

68%

20 days old

Planets
Rise Culm. Set
Mercury 07:51 14:32 21:13
Venus 06:38 13:47 20:56
Moon 22:20 04:15 10:24
Mars 01:12 08:33 15:55
Jupiter 01:47 09:15 16:44
Saturn 22:12 03:51 09:30
All times shown in EDT.

Warning

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.

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.

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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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