Jupiter and Neptune will share the same right ascension, with Jupiter passing 36' to the south of Neptune.
From South El Monte , the pair will be visible in the morning sky, becoming accessible around 23:53, when they reach an altitude of 21° above your south-eastern horizon. They will then reach their highest point in the sky at 03:19, 42° above your southern horizon. They will be lost to dawn twilight around 04:39, 38° above your south-western horizon.
Jupiter will be at mag -2.8, and Neptune at mag 7.8, both in the constellation Capricornus.
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 | 21h52m50s | 13°54'S | Capricornus | -2.8 | 46"1 |
| Neptune | 21h52m50s | 13°17'S | Capricornus | 7.8 | 2"3 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 145° from the Sun, which is in Gemini at this time of year.
The sky on 12 Sep 2025
| The sky on 12 September 2025 | ||||||||||||||||||||||||||||||||||
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66% 20 days old |
All times shown in PDT.
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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
| 28 May 2009 | – Neptune enters retrograde motion |
| 17 Aug 2009 | – Neptune at opposition |
| 04 Nov 2009 | – Neptune ends retrograde motion |
| 31 May 2010 | – Neptune enters 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.