The Moon and Jupiter will share the same right ascension, with the Moon passing 21' to the south of Jupiter. The Moon will be 28 days old.
At around the same time, the two objects will also make a close approach, technically called an appulse.
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 -9.0, and Jupiter at mag -1.9, both in the constellation Sagittarius.
The pair will be close enough to fit within the field of view of a telescope, but will also be visible to the naked eye or through a pair of binoculars.
A graph of the angular separation between the Moon and Jupiter 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 |
| The Moon | 18h49m40s | 23°14'S | Sagittarius | -9.0 | 30'40"5 |
| Jupiter | 18h49m40s | 22°53'S | Sagittarius | -1.9 | 31"4 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 20° from the Sun, which is in Capricornus at this time of year.
The sky on 22 Jan 2020
| The sky on 22 January 2020 | ||||||||||||||||||||||||||||||||||
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1% 27 days old |
All times shown in EST.
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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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| 14 Jul 2020 | – Jupiter at opposition |
| 12 Sep 2020 | – Jupiter 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.