Conjunction between the Moon and Saturn

2015 May 5

Dominic Ford – originally published on

The Moon and Saturn will make a close approach, passing within 1°58' 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 22:54, when they rise 7° above your south-eastern horizon. They will then reach its highest point in the sky at 02:14, 19° above your southern horizon. They will be lost to dawn twilight at around 05:01, 11° above your south-western horizon.

At the moment of closest approach, the Moon will be at mag -12.6, and Saturn at mag 0.8, 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 16h05m20s -16°35' Scorpius -12.6 30'38"1
Saturn 16h04m10s -18°32' Scorpius 0.8 18"4

The coordinates above are given in J2000.0. The pair will be at an angular separation of 161° from the Sun, which is in Aries at this time of year.

The details of this observing event were provided courtesy of