Conjunction between the Moon and Neptune

2016 Nov 9

Dominic Ford – originally published on

The Moon and Neptune will make a close approach, passing within 0°57' of each other.

From London (click to change), the pair will be visible in the evening sky. They will become visible at around 16:41 (GMT) as the dusk sky fades, 19° above your south-eastern horizon. They will then reach its highest point in the sky at 19:26, 29° above your southern horizon. They will continue to be observable until around 23:46, when they sink to 7° above your south-western horizon.

At the moment of closest approach, the Moon will be at mag -12.3, and Neptune at mag 7.9, both in the constellation Aquarius.

The pair will be a little too widely separated to fit comfortably within the field of view of a telescope, but will be visible to the naked eye or a through pair of binoculars.

The precise positions of the Moon and Neptune at the moment of closest approach will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
The Moon 22h42m40s -08°04' Aquarius -12.3 31'47"2
Neptune 22h43m50s -08°59' Aquarius 7.9 2"3

The coordinates above are given in J2000.0. The pair will be at an angular separation of 111° from the Sun, which is in Libra at this time of year.

The details of this observing event were provided courtesy of