Conjunction between the Moon and Saturn

2018 Jun 1

Dominic Ford – originally published on

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

From London (click to change), the pair will be difficult to observe as they will appear no higher than 16° above the horizon. They will be visible in the morning sky. They will become accessible at around 00:12, when they rise 7° above your south-eastern horizon. They will then reach its highest point in the sky at 02:54, 16° above your southern horizon. They will be lost to dawn twilight at around 04:19, 13° above your southern horizon.

At the moment of closest approach, the Moon will be at mag -12.4, and Saturn at mag 0.9, 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.

The precise positions of the Moon and Saturn at the moment of closest approach will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
The Moon 18h32m10s -20°42' Sagittarius -12.4 29'33"3
Saturn 18h32m10s -22°21' Sagittarius 0.9 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 details of this observing event were provided courtesy of