Conjunction of the Moon and Mercury

Dominic Ford, Editor
From the Conjunctions feed


The Moon and Mercury will share the same right ascension, with the Moon passing 6°32' to the south of Mercury. The Moon will be 29 days old.

From South El Monte , the pair will be difficult to observe as they will appear no higher than 9° above the horizon. They will be visible in the dawn sky, rising at 05:13 (PDT) – 1 hour and 16 minutes before the Sun – and reaching an altitude of 9° above the south-eastern horizon before fading from view as dawn breaks at around 06:09.

The Moon will be at mag -8.2, and Mercury at mag -0.7, both in the constellation Libra.

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 15h18m50s 23°26'S Libra -8.2 31'08"4
Mercury 15h18m50s 16°54'S Libra -0.7 5"3

The coordinates above are given in J2000.0. The pair will be at an angular separation of 14° from the Sun, which is in Scorpius at this time of year.

The sky on 16 Jul 2026

The sky on 16 July 2026
Sunrise
05:49
Sunset
20:03
Twilight ends
21:44
Twilight begins
04:08


Waxing Crescent

7%

2 days old

Planets
Rise Culm. Set
Mercury 05:37 12:29 19:20
Venus 09:21 15:51 22:20
Moon 08:28 15:16 21:53
Mars 02:50 09:57 17:04
Jupiter 06:36 13:35 20:35
Saturn 23:59 06:11 12:22
All times shown in PDT.

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 DE440 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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02 Feb 2139  –  Mercury at highest altitude in evening sky
08 Mar 2139  –  Mercury at highest altitude in morning sky

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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