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 Neptune

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

Mercury and Neptune will share the same right ascension, with Mercury passing 0°22' to the north of Neptune.

From Cambridge however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 1° above the horizon at dawn.

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Mercury will be at mag 0.7, and Neptune at mag 8.0, both in the constellation Aquarius.

The pair will be close enough to fit within the field of view of a telescope, but will also be visible through a pair of binoculars.

A graph of the angular separation between Mercury and Neptune 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 23h13m10s -05°41' Aquarius 0.7 9"0
Neptune 23h13m10s -06°04' Aquarius 8.0 2"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 25° from the Sun, which is in Pisces at this time of year.

The sky on 02 April 2019
Sunrise
06:24
Sunset
19:09
Twilight ends
20:46
Twilight begins
04:47

27-day old moon
Waning Crescent

6%

27 days old

Planets
Rise Culm. Set
Mercury 05:32 11:14 16:56
Venus 05:13 10:41 16:09
Moon 05:38 10:59 16:21
Mars 08:30 15:57 23:24
Jupiter 01:02 05:36 10:10
Saturn 02:48 07:27 12:05
All times shown in EDT.

Source

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.

Related news

07 Sep 2018  –  Neptune at opposition
10 Sep 2019  –  Neptune at opposition
11 Sep 2020  –  Neptune at opposition
14 Sep 2021  –  Neptune 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.

Cambridge

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Longitude:
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42.38°N
71.11°W
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