The Moon and Jupiter will make a close approach, passing within a mere 43.1 arcminutes of each other. From some parts of the world, the Moon will pass in front of Jupiter, creating a lunar occultation. The Moon will be 27 days old.
From Cambridge however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 7° above the horizon at dawn.
The Moon will be at mag -9.4 in Aries; and Jupiter will be at mag -2.1 in Pisces.
They will be a little too widely separated to fit comfortably within the field of view of a telescope, but will be visible to the naked eye or through a pair of binoculars.
At around the same time, the pair will also share the same right ascension – called a conjunction.
A graph of the angular separation between the Moon and Jupiter 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 | 01h51m20s | 11°03'N | Aries | -9.4 | 31'28"8 |
| Jupiter | 01h52m30s | 10°25'N | Pisces | -2.1 | 32"9 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 26° from the Sun, which is in Taurus at this time of year.
The sky on 17 May 2023
| The sky on 17 May 2023 | ||||||||||||||||||||||||||||||||||
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3% 27 days old |
All times shown in EDT.
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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.
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Image credit
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.