Conjunction between the Moon and Ceres

2017 Feb 3

Dominic Ford – originally published on

The Moon and 1 Ceres will make a close approach, passing within 0°59' of each other.

From London (click to change), the pair will become visible at around 17:11 (BST) as the dusk sky fades, 44° above your southern horizon. They will then sink towards the horizon, setting 6 hours and 48 minutes after the Sun at 23:35.

At the moment of closest approach, the Moon will be at mag -11.7, and 1 Ceres at mag 7.9, both in the constellation Pisces.

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 1 Ceres at the moment of closest approach will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
The Moon 01h55m00s +07°07' Pisces -11.7 32'04"0
1 Ceres 01h56m10s +06°10' Pisces 7.9 0"0

The coordinates above are given in J2000.0. The pair will be at an angular separation of 75° from the Sun, which is in Capricornus at this time of year.

The details of this observing event were provided courtesy of