Conjunction between the Moon and Saturn

2015 Jun 29

Dominic Ford – originally published on

The Moon and Saturn will make a close approach, passing within 1°56' of each other.

From London (click to change), the pair will be visible in the evening sky. They will become visible at around 21:47 (GMT) as the dusk sky fades, 20° above your southern horizon. They will then reach its highest point in the sky at 22:18, 20° above your southern horizon. They will continue to be observable until around 01:43, when they sink to 8° above your south-western horizon.

At the moment of closest approach, the Moon will be at mag -12.5, and Saturn at mag 0.9, both in the constellation Libra.

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 15h50m10s -15°57' Libra -12.5 30'45"9
Saturn 15h48m50s -17°52' Libra 0.9 18"1

The coordinates above are given in J2000.0. The pair will be at an angular separation of 141° from the Sun, which is in Gemini at this time of year.

The details of this observing event were provided courtesy of