Close approach of Mercury and Saturn

Dominic Ford, Editor
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The planets Mercury and Saturn will make a close approach, passing within a mere 27.0 arcminutes of each other.

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 10° above the horizon at dawn.

Mercury will be at mag -0.5; and Saturn will be at mag 0.4. Both objects will lie in the constellation Scorpius.

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 Mercury and Saturn 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
Mercury 16h08m40s 18°42'S Scorpius -0.5 6"6
Saturn 16h08m10s 19°07'S Scorpius 0.4 15"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 21° from the Sun, which is in Ophiuchus at this time of year.

The sky on 26 Jun 2024

The sky on 26 June 2024
Sunrise
05:19
Sunset
20:29
Twilight ends
22:37
Twilight begins
03:10


Waning Gibbous

72%

20 days old

Planets
Rise Culm. Set
Mercury 06:19 13:54 21:29
Venus 05:46 13:20 20:54
Moon 23:35 04:50 10:16
Mars 02:17 09:13 16:09
Jupiter 03:32 10:53 18:13
Saturn 00:14 05:55 11:37
All times shown in EDT.

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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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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