The Moon and Jupiter will share the same right ascension, with the Moon passing 48" to the north 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 Fairfield , the pair will be difficult to observe as they will appear no higher than 9° above the horizon. They will be visible in the dawn sky, rising at 05:49 (EST) – 1 hour and 24 minutes before the Sun – and reaching an altitude of 9° above the south-eastern horizon before fading from view as dawn breaks at around 06:53.
The Moon will be at mag -8.8, and Jupiter at mag -1.8, both in the constellation Ophiuchus.
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 | 16h46m50s | 21°47'S | Ophiuchus | -8.8 | 33'22"4 |
| Jupiter | 16h46m50s | 21°48'S | Ophiuchus | -1.8 | 30"7 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 18° from the Sun, which is in Sagittarius at this time of year.
The sky on 23 Dec 2030
| The sky on 23 December 2030 | ||||||||||||||||||||||||||||||||||
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0% 28 days old |
All times shown in EST.
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Warning
Never attempt to point a pair of binoculars or a telescope at an object close to the Sun. Doing so may result in immediate and permanent blindness.
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.