The Moon and M45 will make a close approach, passing within a mere 7.6 arcminutes of each other. The Moon will be 27 days old.
From Columbus , the pair will be difficult to observe as they will appear no higher than 12° above the horizon. They will be visible in the dawn sky, rising at 03:50 (EST) – 2 hours and 10 minutes before the Sun – and reaching an altitude of 12° above the eastern horizon before fading from view as dawn breaks at around 05:09.
The Moon will be at mag -9.7; and M45 will be at mag 1.3. Both objects will lie in the constellation Taurus.
They 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 M45 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 | 03h47m20s | 24°13'N | Taurus | -9.7 | 31'08"6 |
| M45 | 03h47m30s | 24°06'N | Taurus | 1.3 | 110'00"0 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 29° from the Sun, which is in Taurus at this time of year.
The sky on 20 Jun 2028
| The sky on 20 June 2028 | ||||||||||||||||||||||||||||||||||
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4% 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.
Image credit
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.