Conjunction between the Moon and Jupiter

2015 May 24

Dominic Ford – originally published on

The Moon and Jupiter will make a close approach, passing within 4°58' of each other.

From London (click to change), the pair will become visible at around 21:20 (GMT) as the dusk sky fades, 38° above your south-western horizon. They will then sink towards the horizon, setting 4 hours and 52 minutes after the Sun at 01:44.

At the moment of closest approach, the Moon will be at mag -11.4, and Jupiter at mag -2.0, both in the constellation Cancer.

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 09h07m30s +12°14' Cancer -11.4 29'53"4
Jupiter 09h12m20s +17°04' Cancer -2.0 34"5

The coordinates above are given in J2000.0. The pair will be at an angular separation of 73° from the Sun, which is in Taurus at this time of year.

The details of this observing event were provided courtesy of