The Moon and Mercury will share the same right ascension, with the Moon passing 2°34' to the south of Mercury. The Moon will be 28 days old.
From South El Monte , the pair will be visible in the dawn sky, rising at 05:12 (PDT) – 1 hour and 40 minutes before the Sun – and reaching an altitude of 13° above the south-eastern horizon before fading from view as dawn breaks at around 06:29.
The Moon will be at mag -9.1, and Mercury at mag -0.4, both in the constellation Ophiuchus.
The pair will be too widely separated to fit within the field of view of a telescope, but will be visible to the naked eye or through a pair of binoculars.
A graph of the angular separation between the Moon and Mercury 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 | 16h30m40s | 22°17'S | Ophiuchus | -9.1 | 32'40"5 |
| Mercury | 16h30m40s | 19°42'S | Ophiuchus | -0.4 | 6"6 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 21° from the Sun, which is in Sagittarius at this time of year.
The sky on 4 Jul 2025
| The sky on 4 July 2025 | ||||||||||||||||||||||||||||||||||
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69% 9 days old |
All times shown in PDT.
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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.
Related news
| 20 Dec 2011 | – Mercury at highest altitude in morning sky |
| 22 Dec 2011 | – Mercury at greatest elongation west |
| 05 Mar 2012 | – Mercury at highest altitude in evening sky |
| 04 Mar 2012 | – Mercury at greatest elongation east |
Image credit
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.