© NASA/Voyager 2

Neptune at solar conjunction

Dominic Ford, Editor
From the Outer Planets feed

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

Neptune will pass close to the Sun in the sky as its orbit carries it around the far side of the solar system from the Earth.

At closest approach, Neptune will appear at a separation of only 1°10' from the Sun, making it totally unobservable for several weeks while it is lost in the Sun's glare.

At around the same time, Neptune will also be at its most distant from the Earth – receding to a distance of 30.91 AU – since the two planets will lie on opposite sides of the solar system.

Over following weeks and months, Neptune will re-emerge to the west of the Sun, gradually becoming visible for ever-longer periods in the pre-dawn sky. After around six months, it will reach opposition, when it will be visible for virtually the whole night. A chart of the path of Neptune across the sky in 2023 can be found here, and a chart of its rising and setting times here.

The position of Neptune at the moment it passes solar conjunction will be:

Object Right Ascension Declination Constellation Angular Size
Neptune 23h42m40s 3°08'S Pisces 2.2"
Sun 23h40m 2°04'S Pisces 32'09"

The coordinates above are given in J2000.0.

The sky on 15 Mar 2023

The sky on 15 March 2023
Twilight ends
Twilight begins

23-day old moon
Waning Crescent


23 days old

Rise Culm. Set
Mercury 07:01 12:52 18:44
Venus 08:29 15:00 21:31
Moon 02:27 07:20 12:13
Mars 11:38 18:53 02:08
Jupiter 07:57 14:12 20:27
Saturn 05:58 11:28 16:59
All times shown in PDT.


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 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.

Related news

03 Dec 2022  –  Neptune ends retrograde motion
30 Jun 2023  –  Neptune enters retrograde motion
19 Sep 2023  –  Neptune at opposition
06 Dec 2023  –  Neptune ends retrograde motion

Image credit

© NASA/Voyager 2


San Diego



Color scheme