Mars and 1 Ceres will share the same right ascension, with Mars passing 3°47' to the south of 1 Ceres.
From South El Monte , the pair will be visible in the dawn sky, rising at 00:26 (PST) and reaching an altitude of 67° above the south-eastern horizon before fading from view as dawn breaks at around 06:05.
Mars will be at mag 0.8, and 1 Ceres at mag 8.6, both in the constellation Cancer.
The pair will be too widely separated to fit within the field of view of a telescope, but will be visible through a pair of binoculars.
A graph of the angular separation between Mars 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 |
| Mars | 08h57m40s | 18°42'N | Cancer | 0.8 | 6"7 |
| 1 Ceres | 08h57m40s | 22°30'N | Cancer | 8.6 | 0"0 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 80° from the Sun, which is in Virgo at this time of year.
The sky on 20 Dec 2025
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All times shown in PST.
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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
| 21 Oct 1993 | – 1 Ceres at opposition |
| 01 Feb 1995 | – 1 Ceres at opposition |
| 29 May 1996 | – 1 Ceres at opposition |
| 29 Aug 1997 | – 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.