Conjunction between the Moon and Saturn

2015 Sep 19

Dominic Ford – originally published on In-The-Sky.org

The Moon and Saturn will make a close approach, passing within 2°45' of each other.

From London (click to change), the pair will be difficult to observe as they will appear no higher than 13° above the horizon. They will become visible at around 19:26 (GMT) as the dusk sky fades, 13° above your south-western horizon. They will then sink towards the horizon, setting 2 hours and 21 minutes after the Sun at 21:25.

At the moment of closest approach, the Moon will be at mag -11.2, and Saturn at mag 1.1, 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 15h54m00s -15°38' Libra -11.2 30'01"7
Saturn 15h52m10s -18°22' Libra 1.1 15"9

The coordinates above are given in J2000.0. The pair will be at an angular separation of 64° from the Sun, which is in Virgo at this time of year.


The details of this observing event were provided courtesy of In-The-Sky.org

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