The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.

Close approach of the Moon and Saturn

Dominic Ford, Editor
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The sky at

The Moon and Saturn will make a close approach, passing within 1°38' of each other. The Moon will be 17 days old.

From Ashburn , the pair will be visible in the morning sky, becoming accessible around 23:28, when they reach an altitude of 10° above your south-eastern horizon. They will then reach their highest point in the sky at 03:07, 28° above your southern horizon. They will be lost to dawn twilight around 05:11, 22° above your south-western horizon.

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The Moon will be at mag -12.4; and Saturn will be at mag 0.1. Both objects will lie in the constellation Sagittarius.

They 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.

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 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
The Moon 18h32m20s 20°42'S Sagittarius -12.4 29'33"3
Saturn 18h32m10s 22°21'S Sagittarius 0.1 18"1

The coordinates above are given in J2000.0. The pair will be at an angular separation of 152° from the Sun, which is in Taurus at this time of year.

The sky on 31 May 2018

The sky on 31 May 2018
Sunrise
05:44
Sunset
20:29
Twilight ends
22:24
Twilight begins
03:49

16-day old moon
Waning Gibbous

92%

16 days old

Planets
Rise Culm. Set
Mercury 05:24 12:38 19:52
Venus 08:04 15:35 23:05
Moon 21:26 02:27 07:27
Mars 00:19 05:07 09:54
Jupiter 18:12 23:24 04:36
Saturn 22:21 03:07 07:52
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.

Related news

17 Apr 2018  –  Saturn enters retrograde motion
27 Jun 2018  –  Saturn at opposition
06 Sep 2018  –  Saturn ends retrograde motion
29 Apr 2019  –  Saturn enters retrograde motion

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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Ashburn

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Longitude:
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39.04°N
77.49°W
EDT

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