Conjunction between the Moon and Saturn

2015 Mar 12

Dominic Ford – originally published on

The Moon and Saturn will make a close approach, passing within 2°13' of each other.

From London (click to change), the pair will be difficult to observe as they will appear no higher than 19° above the horizon. They will be visible in the morning sky. They will become accessible at around 01:43, when they rise 7° above your south-eastern horizon. They will then reach its highest point in the sky at 04:55, 19° above your southern horizon. They will be lost to dawn twilight at around 06:00, 18° above your southern horizon.

At the moment of closest approach, the Moon will be at mag -12.2, and Saturn at mag 1.0, both in the constellation Scorpius.

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 16h13m40s -16°48' Scorpius -12.2 30'39"2
Saturn 16h12m30s -19°01' Scorpius 1.0 17"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 106° from the Sun, which is in Aquarius at this time of year.

The details of this observing event were provided courtesy of