Close approach of the Moon and Mercury

Dominic Ford, Editor
From the Appulses feed

Tags: Appulse

The Moon and Mercury will make a close approach, passing within a mere 12.5 arcminutes of each other. From some parts of the world, the Moon will pass in front of Mercury, creating a lunar occultation. The Moon will be 1 days old.

From Jacksonville , the pair will become visible at around 18:38 (EDT), 11° above your western horizon, as dusk fades to darkness. They will then sink towards the horizon, setting 1 hour and 12 minutes after the Sun at 19:35.

The Moon will be at mag -8.4; and Mercury will be at mag -1.0. Both objects will lie in the constellation Pisces.

They will be close enough to fit within the field of view of a telescope, but will also be visible to the naked eye or through a pair of binoculars.

At around the same time, the pair will also share the same right ascension – called a conjunction.

A graph of the angular separation between the Moon and Mercury around the time of closest approach is available here.

The positions of the pair at the moment of closest approach will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
The Moon 23h52m30s 0°01'S Pisces -8.4 30'47"0
Mercury 23h52m50s 0°13'S Pisces -1.0 6"2

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

The sky on 23 Jul 2024

The sky on 23 July 2024
Sunrise
06:37
Sunset
20:25
Twilight ends
21:58
Twilight begins
05:04


Waning Gibbous

90%

18 days old

Planets
Rise Culm. Set
Mercury 08:47 15:16 21:45
Venus 07:41 14:27 21:14
Moon 21:48 03:17 08:54
Mars 02:26 09:18 16:09
Jupiter 03:07 10:04 17:00
Saturn 22:54 04:41 10:29
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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22 Apr 2071  –  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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