None available.

Conjunction of Mercury and Neptune

Dominic Ford, Editor
From the Conjunctions feed

Please wait
Loading 0/4
Click and drag to rotate
Mouse wheel to zoom in/out
Touch with mouse to dismiss
The sky at

Mercury and Neptune will share the same right ascension, with Mercury passing 0°41' to the south of Neptune.

From Ashburn however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 3° above the horizon at dawn.

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 0.5, and Neptune at mag 8.0, 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 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 00h03m00s -01°44' Pisces 0.5 8"6
Neptune 00h03m00s -01°03' Pisces 8.0 2"2

The coordinates above are given in J2000.0. The pair will be at an angular separation of 26° from the Sun, which is in Pisces at this time of year.

The sky on 16 April 2025
Twilight ends
Twilight begins

18-day old moon
Waning Gibbous


18 days old

Rise Culm. Set
Mercury 05:36 11:33 17:30
Venus 04:57 11:04 17:12
Moon 23:53 03:27 08:02
Mars 12:14 19:37 03:01
Jupiter 09:16 16:39 00:05
Saturn 05:27 11:19 17:11
All times shown in EDT.


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

19 Mar 2025  –  Neptune at solar conjunction
23 Sep 2025  –  Neptune at opposition
22 Mar 2026  –  Neptune at solar conjunction
25 Sep 2026  –  Neptune at opposition

Image credit

None available.




Color scheme