Conjunction between the Moon and Jupiter

2018 Oct 12

Dominic Ford – originally published on

The Moon and Jupiter will make a close approach, passing within 3°56' of each other.

From London (click to change) however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 6° above the horizon at dusk.

At the moment of closest approach, the Moon will be at mag -10.1, and Jupiter at mag -1.8, 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 Jupiter at the moment of closest approach will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
The Moon 15h31m30s -14°15' Libra -10.1 30'59"0
Jupiter 15h27m00s -18°02' Libra -1.8 31"3

The coordinates above are given in J2000.0. The pair will be at an angular separation of 35° from the Sun, which is in Virgo at this time of year.

The details of this observing event were provided courtesy of