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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Mercury and Neptune will share the same right ascension, with Mercury passing 2°10' to the north of Neptune.

From Fairfield, the pair will be difficult to observe as they will appear no higher than 9° above the horizon. They will become visible around 18:06 (EDT) as the dusk sky fades, 9° above your western horizon. They will then sink towards the horizon, setting 1 hour and 15 minutes after the Sun at 19:01.

Begin typing the name of a town near to you, and then select the town from the list of options which appear below.

Mercury will be at mag -0.9, and Neptune at mag 8.0, both in the constellation Pisces.

The pair will be too widely separated to fit 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 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 23h56m50s +00°27' Pisces -0.9 6"3
Neptune 23h56m50s -01°42' Pisces 8.0 2"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 16° from the Sun, which is in Aquarius at this time of year.

The sky on 03 March 2025
Sunrise
06:22
Sunset
17:46
Twilight ends
19:18
Twilight begins
04:50

3-day old moon
Waxing Crescent

18%

3 days old

Planets
Rise Culm. Set
Mercury 07:02 13:08 19:14
Venus 06:54 13:35 20:17
Moon 08:06 15:15 22:40
Mars 12:37 20:21 04:05
Jupiter 10:26 17:51 01:17
Saturn 06:51 12:35 18:19
All times shown in EST.

Warning

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.

Source

The circumstances of this event were computed using the DE430 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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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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41.14°N
73.26°W
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