Mercury and 134340 Pluto will share the same right ascension, with Mercury passing 30' to the north of 134340 Pluto.
From South El Monte however, the pair will not be observable – they will reach their highest point in the sky during daytime and will be no higher than 4° above the horizon at dawn.
Mercury will be at mag 0.0, and 134340 Pluto at mag 14.9, both in the constellation Sagittarius.
The pair will be a little too widely separated to fit comfortably within the field of view of a telescope, but will be visible through a pair of binoculars.
A graph of the angular separation between Mercury and 134340 Pluto 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 |
| Mercury | 19h08m00s | 20°27'S | Sagittarius | 0.0 | 7"8 |
| 134340 Pluto | 19h08m00s | 20°57'S | Sagittarius | 14.9 | 0"0 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 23° from the Sun, which is in Capricornus at this time of year.
The sky on 19 Aug 2025
| The sky on 19 August 2025 | ||||||||||||||||||||||||||||||||||
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7% 26 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
| 06 Jul 2015 | – 134340 Pluto at opposition |
| 07 Jul 2016 | – 134340 Pluto at opposition |
| 09 Jul 2017 | – 134340 Pluto at opposition |
| 12 Jul 2018 | – 134340 Pluto at opposition |
Image credit
The Moon in conjunction with Venus and Jupiter, with the Very Large Telescope in the foreground. Image © Y. Beletsky, ESO, 2009.