Conjunction between the Moon and Saturn

2018 Nov 11

Dominic Ford – originally published on

The Moon and Saturn will make a close approach, passing within 1°26' of each other.

From London (click to change), the pair will be difficult to observe as they will appear no higher than 12° above the horizon. They will become visible at around 16:39 (BST) as the dusk sky fades, 12° above your southern horizon. They will then sink towards the horizon, setting 2 hours and 44 minutes after the Sun at 18:59.

At the moment of closest approach, the Moon will be at mag -10.6, and Saturn at mag 1.2, 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 18h24m30s -21°18' Sagittarius -10.6 29'55"9
Saturn 18h24m20s -22°45' Sagittarius 1.2 15"5

The coordinates above are given in J2000.0. The pair will be at an angular separation of 46° from the Sun, which is in Libra at this time of year.

The details of this observing event were provided courtesy of