The Moon and Neptune will make a close approach, passing within a mere 0.1 arcminutes of each other. From some parts of the world, the Moon will pass in front of Neptune, creating a lunar occultation. The Moon will be 26 days old.
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 12° above the horizon at dawn.
The Moon will be at mag -10.8; and Neptune will be at mag 8.0. Both objects will lie in the constellation Capricornus.
They will be close enough to fit within the field of view of a telescope, but will also be visible through a pair of binoculars.
A graph of the angular separation between the Moon and Neptune around the time of closest approach is available here.
The positions of the pair at the moment of closest approach will be as follows:
| Object | Right Ascension | Declination | Constellation | Magnitude | Angular Size |
| The Moon | 21h43m10s | 14°01'S | Capricornus | -10.8 | 31'17"9 |
| Neptune | 21h43m10s | 14°01'S | Capricornus | 8.0 | 2"2 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 49° from the Sun, which is in Pisces at this time of year.
The sky on 3 Jun 2026
| The sky on 3 June 2026 | ||||||||||||||||||||||||||||||||||
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88% 18 days old |
All times shown in PDT.
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Source
The circumstances of this event were computed using the DE440 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
| 31 Oct 2007 | – Neptune ends retrograde motion |
| 26 May 2008 | – Neptune enters retrograde motion |
| 15 Aug 2008 | – Neptune at opposition |
| 02 Nov 2008 | – 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.