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°05' to the south of Mercury. The Moon will be 2 days old.

From Northridge , the pair will become visible at around 18:42 (PDT), 12° above your western horizon, as dusk fades to darkness. They will then sink towards the horizon, setting 1 hour and 32 minutes after the Sun at 19:50.

The Moon will be at mag -8.4 in the constellation Pisces, and Mercury at mag -0.1 in the neighbouring constellation of Aries.

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 01h57m50s 8°43'N Pisces -8.4 29'51"9
Mercury 01h57m50s 14°48'N Aries -0.1 7"5

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

The sky on 2 Sep 2025

The sky on 2 September 2025
Sunrise
06:25
Sunset
19:18
Twilight ends
20:45
Twilight begins
04:58


Waxing Gibbous

82%

10 days old

Planets
Rise Culm. Set
Mercury 05:37 12:16 18:55
Venus 03:58 10:52 17:47
Moon 16:23 21:03 01:46
Mars 09:21 15:06 20:52
Jupiter 02:15 09:23 16:30
Saturn 20:13 02:09 08:05
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 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

02 Apr 1984  –  Mercury at greatest elongation east
19 May 1984  –  Mercury at greatest elongation west
25 May 1984  –  Mercury at highest altitude in morning sky
22 Jul 1984  –  Mercury at highest altitude in evening 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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