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 Mercury

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

The Moon and Mercury will share the same right ascension, with the Moon passing 2°45' to the north of Mercury. The Moon will be 28 days old.

From Washington however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 5° above the horizon at dawn.

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 -8.2, and Mercury at mag -0.4, both in the constellation Sagittarius.

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 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 17h56m10s -21°00' Sagittarius -8.2 29'53"6
Mercury 17h56m10s -23°45' Sagittarius -0.4 5"0

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

The sky on 04 January 2019
Sunrise
07:47
Sunset
17:28
Twilight ends
19:01
Twilight begins
06:14

28-day old moon
Waning Crescent

1%

28 days old

Planets
Rise Culm. Set
Mercury 06:48 11:34 16:19
Venus 04:07 09:19 14:32
Moon 06:39 11:35 16:31
Mars 11:40 17:45 23:50
Jupiter 05:28 10:21 15:14
Saturn 07:37 12:27 17:18
All times shown in MST.

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 DE405 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

15 Dec 2018  –  Mercury at greatest elongation west
26 Feb 2019  –  Mercury at greatest elongation east
01 Mar 2019  –  Mercury reaches highest point in evening sky
09 Apr 2019  –  Mercury reaches highest point 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.

Washington

Latitude:
Longitude:
Timezone:

37.13°N
113.51°W
MDT

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