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BAA Observing calendar

Conjunction between Saturn and M22

Thursday, 2018, March 22 - 02:08

Dominic Ford – originally published on

Saturn and M22 will make a close approach, passing within 1°36' 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 12° above the horizon at dawn.

At the moment of closest approach, Saturn will be at mag 1.1, and M22 at mag 5.1, both in the constellation Sagittarius.

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 Saturn and M22 at the moment of closest approach will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
Saturn 18h35m50s -22°17' Sagittarius 1.1 16"3
M22 18h36m20s -23°54' Sagittarius 5.1 24"0

The coordinates above are given in J2000.0. The pair will be at an angular separation of 82° from the Sun, which is in Pisces at this time of year.

The details of this observing event were provided courtesy of