The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.

Conjunction of Mercury and Ceres

Fri, 16 Jun 2017 at17:59 EDT(126 days ago)
21:59 UTC

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

Mercury and 1 Ceres will share the same right ascension, with Mercury passing 0°43' to the north of 1 Ceres.

From Ashburn (click to change) however, the pair will not be readily observable since they will be very close to the Sun, at a separation of only 5° from it.

Mercury will be at mag -1.8, and 1 Ceres at mag 8.6, both in the constellation Taurus.

The pair will be a little too widely separated to fit comfortably within the field of view of a telescope, but will be visible through a pair of binoculars.

A graph of the angular separation between Mercury and 1 Ceres around the time of closest approach is available here.

The positions of the two objects at the moment of conjunction will be as follows:

Object Right Ascension Declination Constellation Magnitude Angular Size
Mercury 05h16m00s +23°24' Taurus -1.8 5"1
1 Ceres 05h16m00s +22°41' Taurus 8.6 0"0

The coordinates above are given in J2000.0. The pair will be at an angular separation of 5° from the Sun, which is in Taurus at this time of year.

The sky on 16 June 2017
Sunrise 05:42
Sunset 20:36
Twilight ends
Twilight begins

22-day old moon
Age of Moon
22 days

All times shown in EDT.
Rise Culm. Set
Mercury 05:18 12:43 20:08
Venus 03:20 10:04 16:47
Moon 00:52 06:28 12:03
Mars 06:34 14:03 21:31
Jupiter 14:28 20:18 02:12
Saturn 20:15 01:06 05:53


Never attempt to point a pair of binoculars or a telescope at an object close to the Sun. Doing so may result in immediate and permanent blindness.


The circumstances of this event were computed using the DE405 planetary ephemeris published by the Jet Propulsion Laboratory (JPL).

This event was automatically generated by searching the ephemeris for planetary alignments which are of interest to amateur astronomers, and the text above was generated based on an estimate of your location.

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29 May 2019, 20:39 EDT1 Ceres at opposition

Image credit

The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.




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