Saturn and 1 Ceres will share the same right ascension, with Saturn passing 7°51' to the north of 1 Ceres.
From South El Monte , the pair will become visible at around 17:48 (PST), 24° above your south-western horizon, as dusk fades to darkness. They will then sink towards the horizon, setting 3 hours and 57 minutes after the Sun at 20:40.
Saturn will be at mag 0.5, and 1 Ceres at mag 9.3, both in the constellation Capricornus.
A graph of the angular separation between Saturn 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 |
| Saturn | 21h07m50s | 17°32'S | Capricornus | 0.5 | 16"0 |
| 1 Ceres | 21h07m50s | 25°23'S | Capricornus | 9.3 | 0"0 |
The coordinates above are given in J2000.0. The pair will be at an angular separation of 57° from the Sun, which is in Ophiuchus at this time of year.
The sky on 18 Dec 2025
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0% 29 days old |
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
| 24 Jul 1992 | – 1 Ceres at opposition |
| 21 Oct 1993 | – 1 Ceres at opposition |
| 01 Feb 1995 | – 1 Ceres at opposition |
| 29 May 1996 | – 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.