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

Conjunction of Jupiter and Neptune

Dominic Ford, Editor
From the Conjunctions feed

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The sky at

Jupiter and Neptune will share the same right ascension, with Jupiter passing 51' to the south of Neptune.

From South El Monte however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 8° above the horizon at dawn.

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Jupiter will be at mag -1.8, and Neptune at mag 8.0, both in the constellation Sagittarius.

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 Jupiter 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
Jupiter 18h01m00s 23°08'S Sagittarius -1.8 31"4
Neptune 18h01m00s 22°16'S Sagittarius 8.0 2"1

The coordinates above are given in J2000.0. The pair will be at an angular separation of 28° from the Sun, which is in Sagittarius at this time of year.

The sky on 31 Aug 2025

The sky on 31 August 2025
Sunrise
06:22
Sunset
19:18
Twilight ends
20:45
Twilight begins
04:55

8-day old moon
Waxing Gibbous

57%

8 days old

Planets
Rise Culm. Set
Mercury 05:25 12:07 18:49
Venus 03:53 10:49 17:44
Moon 14:33 19:14 23:53
Mars 09:21 15:08 20:54
Jupiter 02:20 09:27 16:34
Saturn 20:19 02:15 08:11
All times shown in PDT.

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.

Related news

08 Sep 1983  –  Neptune ends retrograde motion
02 Apr 1984  –  Neptune enters retrograde motion
20 Jun 1984  –  Neptune at opposition
09 Sep 1984  –  Neptune ends retrograde motion

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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South El Monte

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Longitude:
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34.05°N
118.05°W
PDT

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