Ephemeris: 12/26/2025 – Conjunctions, eclipses, transits and occultations, oh my!
This is Ephemeris for Friday, December 26th. Today the Sun will be up for 8 hours and 49 minutes, setting at 5:08, and it will rise tomorrow at 8:19. The Moon, 1 day before first quarter, will set at 12:13 tomorrow morning.
Tonight the Moon will pass north of the planet Saturn. That will mean in that location in the southwestern sky, the planet will appear just below and left of the Moon. When two solar system objects appear to pass each other, it’s called a conjunction. To astronomers, it’s no big deal unless one passes directly in front of the other. If a smaller appearing one crosses the disc of a larger one, it’s called a transit, If one is completely hidden by another it’s an occultation. Occultations and transits of Jupiter and its satellites are common. Also, Jupiter’s satellites are eclipsed by passing through the planet’s shadow. We are in a period now when Jupiter’s moons occult and eclipse each other occasionally.
The astronomical event times given in this blog are for the Traverse City/Interlochen area of Michigan (Lat 44.7° N, Long 85.7° W; EST, UT – 5 hours) unless stated otherwise. Times will be different for other locations.
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