Neptune and 1 Ceres will share the same right ascension, with Neptune passing 6°56' to the south of 1 Ceres.
From South El Monte , the pair will be visible in the dawn sky, rising at 22:15 (PDT) and reaching an altitude of 78° above the southern horizon before fading from view as dawn breaks at around 05:18.
Neptune will be at mag 7.9, and 1 Ceres at mag 8.2, both in the constellation Cancer.
A graph of the angular separation between Neptune and 1 Ceres 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 |
| Neptune | 09h20m00s | 15°41'N | Cancer | 7.9 | 2"2 |
| 1 Ceres | 09h20m00s | 22°38'N | Cancer | 8.2 | 0"0 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 97° from the Sun, which is in Libra at this time of year.
The sky on 4 Jul 2026
| The sky on 4 July 2026 | ||||||||||||||||||||||||||||||||||
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75% 20 days old |
All times shown in PDT.
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Source
The circumstances of this event were computed using the DE440 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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| 29 Aug 2089 | – 1 Ceres 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.