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 7°34' to the south of Mercury. The Moon will be 29 days old.

From Fairfield however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 2° above the horizon at dawn.

The Moon will be at mag -8.7, and Mercury at mag 1.5, both in the constellation Sagittarius.

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 19h46m10s 25°23'S Sagittarius -8.7 32'56"0
Mercury 19h46m10s 17°49'S Sagittarius 1.5 9"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 Capricornus at this time of year.

The sky on 30 Jan 2022

The sky on 30 January 2022
Sunrise
07:04
Sunset
17:06
Twilight ends
18:41
Twilight begins
05:28


Waning Crescent

0%

28 days old

Planets
Rise Culm. Set
Mercury 06:02 11:00 15:58
Venus 04:54 09:58 15:02
Moon 06:12 10:35 15:00
Mars 04:59 09:32 14:04
Jupiter 08:20 13:47 19:15
Saturn 07:23 12:24 17:25
All times shown in EST.

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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16 Feb 2022  –  Mercury at greatest elongation west
28 Apr 2022  –  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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