Conjunction between the Moon and Jupiter

2015 Jun 20

Dominic Ford – originally published on

The Moon and Jupiter will make a close approach, passing within 4°29' of each other.

From London (click to change), the pair will be difficult to observe as they will appear no higher than 19° above the horizon. They will become visible at around 21:50 (GMT) as the dusk sky fades, 19° above your western horizon. They will then sink towards the horizon, setting 2 hours and 47 minutes after the Sun at 00:06.

At the moment of closest approach, the Moon will be at mag -10.7, and Jupiter at mag -1.8, both in the constellation Leo.

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 09h24m10s +11°25' Leo -10.7 29'54"0
Jupiter 09h28m50s +15°46' Leo -1.8 32"3

The coordinates above are given in J2000.0. The pair will be at an angular separation of 50° from the Sun, which is in Taurus at this time of year.

The details of this observing event were provided courtesy of