Jupiter's moons in January 2027
Io · Europa · Ganymede · Callisto — eclipses, occultations, transits, shadows, and 13 mutual events
Jupiter's four big moons put on a show every night: they slip behind the planet and into its shadow, cross its face, and drag their shadows across the cloud tops. Any telescope shows it. This is a mutual-event season — every six years the moons' orbits turn edge-on to the Sun and they eclipse and occult each other. Times are for the whole Earth; pick a location and the list keeps only what your sky shows.
| When (UTC) | Event | Jupiter in your sky |
|---|---|---|
| Jan 1 05:47 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 1 09:00 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 2 03:04 UTC | Io's shadow enters the disctakes 6 min | — |
| Jan 2 03:20 UTC | Europa's shadow enters the disctakes 6 min | — |
| Jan 2 03:54 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 2 05:06 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 2 05:19 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 2 06:11 UTC | Io's transit endstakes 4 min | — |
| Jan 2 06:13 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 2 07:59 UTC | Europa's transit endstakes 4 min | — |
| Jan 3 00:16 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 3 03:27 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 3 21:32 UTC | Io's shadow enters the disctakes 5 min | — |
| Jan 3 21:55 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Jan 3 22:20 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 3 22:59 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Jan 3 23:28 UTC | Io eclipses Ganymede5.3 min · 40% of Ganymede covered · drops ≈0.6 mag | — |
| Jan 3 23:48 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 4 00:38 UTC | Io's transit endstakes 4 min | — |
| Jan 4 02:26 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Jan 4 06:03 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Jan 4 18:44 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 4 19:15 UTC | Europa eclipses Ganymede18.3 min · 33% of Ganymede covered · drops ≈0.4 mag | — |
| Jan 4 21:53 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 5 08:44 UTC | Callisto disappears into Jupiter's shadowtakes 10 min | — |
| Jan 5 13:29 UTC | Callisto reappears from Jupiter's shadowtakes 10 min | — |
| Jan 5 15:58 UTC | Io's shadow enters the disctakes 7 min | — |
| Jan 5 16:35 UTC | Callisto disappears behind Jupitertakes 10 min | — |
| Jan 5 16:36 UTC | Europa's shadow enters the disctakes 8 min | — |
| Jan 5 16:47 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 5 18:16 UTC | Io's shadow leaves the disctakes 4 min | — |
| Jan 5 18:17 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 5 19:04 UTC | Io's transit endstakes 4 min | — |
| Jan 5 19:31 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 5 21:09 UTC | Europa's transit endstakes 4 min | — |
| Jan 5 21:15 UTC | Callisto reappears from behind Jupitertakes 10 min | — |
| Jan 6 13:13 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 6 15:35 UTC | Ganymede eclipses Callisto11.1 min · 69% of Callisto covered · drops ≈1.3 mag | — |
| Jan 6 16:20 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 7 10:26 UTC | Io's shadow enters the disctakes 5 min | — |
| Jan 7 11:12 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Jan 7 11:13 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 7 12:44 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 7 13:03 UTC | Ganymede's shadow enters the disctakes 13 min | — |
| Jan 7 13:30 UTC | Io's transit endstakes 4 min | — |
| Jan 7 15:35 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Jan 7 16:12 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Jan 7 16:42 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| Jan 7 19:49 UTC | Ganymede's transit endstakes 8 min | — |
| Jan 8 00:56 UTC | Ganymede eclipses Io8.5 min · 87% of Io covered · drops ≈2.2 mag | — |
| Jan 8 07:41 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 8 10:46 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 9 04:55 UTC | Io's shadow enters the disctakes 5 min | — |
| Jan 9 05:39 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 9 05:56 UTC | Europa's shadow enters the disctakes 6 min | — |
| Jan 9 07:12 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 9 07:26 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 9 07:57 UTC | Io's transit endstakes 4 min | — |
| Jan 9 08:49 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 9 10:19 UTC | Europa's transit endstakes 4 min | — |
| Jan 10 02:10 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 10 05:13 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 10 23:23 UTC | Io's shadow enters the disctakes 5 min | — |
| Jan 11 00:06 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 11 00:29 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Jan 11 01:41 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 11 02:10 UTC | Io eclipses Ganymede5.3 min · 39% of Ganymede covered · drops ≈0.5 mag | — |
| Jan 11 02:23 UTC | Io's transit endstakes 4 min | — |
| Jan 11 02:57 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Jan 11 04:43 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Jan 11 09:28 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Jan 11 20:38 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 11 23:22 UTC | Europa eclipses Ganymede12.6 min · 16% of Ganymede covered · drops ≈0.2 mag | — |
| Jan 11 23:39 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 12 17:51 UTC | Io's shadow enters the disctakes 5 min | — |
| Jan 12 18:32 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 12 19:12 UTC | Europa's shadow enters the disctakes 7 min | — |
| Jan 12 20:09 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 12 20:36 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 12 20:49 UTC | Io's transit endstakes 4 min | — |
| Jan 12 22:07 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 12 23:29 UTC | Europa's transit endstakes 4 min | — |
| Jan 13 15:07 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 13 18:05 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 13 19:09 UTC | Callisto's shadow enters the disctakes 15 min | — |
| Jan 13 23:58 UTC | Callisto's shadow leaves the disctakes 9 min | — |
| Jan 14 01:22 UTC | Callisto begins its transit across the disctakes 10 min | — |
| Jan 14 05:57 UTC | Callisto's transit endstakes 10 min | — |
| Jan 14 12:22 UTC | Io's shadow enters the disctakes 3 min | — |
| Jan 14 12:58 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 14 13:45 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Jan 14 14:37 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 14 15:15 UTC | Io's transit endstakes 4 min | — |
| Jan 14 17:00 UTC | Ganymede's shadow enters the disctakes 13 min | — |
| Jan 14 17:51 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Jan 14 19:35 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Jan 14 20:40 UTC | Ganymede's shadow leaves the disctakes 7 min | — |
| Jan 14 23:12 UTC | Ganymede's transit endstakes 8 min | — |
| Jan 15 03:59 UTC | Ganymede eclipses Io7.0 min · 70% of Io covered · drops ≈1.3 mag | — |
| Jan 15 09:35 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 15 12:31 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 16 06:48 UTC | Io's shadow enters the disctakes 5 min | — |
| Jan 16 07:24 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 16 08:30 UTC | Europa's shadow enters the disctakes 8 min | — |
| Jan 16 09:06 UTC | Io's shadow leaves the disctakes 4 min | — |
| Jan 16 09:41 UTC | Io's transit endstakes 4 min | — |
| Jan 16 09:45 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 16 11:25 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 16 12:37 UTC | Europa's transit endstakes 4 min | — |
| Jan 17 04:04 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 17 06:58 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 18 01:16 UTC | Io's shadow enters the disctakes 5 min | — |
| Jan 18 01:50 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 18 03:02 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Jan 18 03:34 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 18 04:08 UTC | Io's transit endstakes 4 min | — |
| Jan 18 04:53 UTC | Io eclipses Ganymede5.2 min · 37% of Ganymede covered · drops ≈0.5 mag | — |
| Jan 18 06:56 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Jan 18 06:59 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Jan 18 12:51 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Jan 18 22:32 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 19 01:24 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 19 03:18 UTC | Europa eclipses Ganymede6.0 min · 2% of Ganymede covered · drops ≈0.0 mag | — |
| Jan 19 19:45 UTC | Io's shadow enters the disctakes 7 min | — |
| Jan 19 20:16 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 19 21:48 UTC | Europa's shadow enters the disctakes 7 min | — |
| Jan 19 22:03 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 19 22:34 UTC | Io's transit endstakes 4 min | — |
| Jan 19 22:54 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 20 00:43 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 20 01:46 UTC | Europa's transit endstakes 4 min | — |
| Jan 20 17:01 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 20 19:50 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 21 14:13 UTC | Io's shadow enters the disctakes 6 min | — |
| Jan 21 14:42 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 21 16:19 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Jan 21 16:31 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 21 17:00 UTC | Io's transit endstakes 4 min | — |
| Jan 21 20:07 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Jan 21 20:58 UTC | Ganymede's shadow enters the disctakes 12 min | — |
| Jan 21 22:55 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Jan 22 00:38 UTC | Ganymede's shadow leaves the disctakes 7 min | — |
| Jan 22 02:32 UTC | Ganymede's transit endstakes 8 min | — |
| Jan 22 02:44 UTC | Callisto disappears into Jupiter's shadowtakes 10 min | — |
| Jan 22 06:55 UTC | Ganymede eclipses Io5.7 min · 43% of Io covered · drops ≈0.6 mag | — |
| Jan 22 11:29 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 22 11:58 UTC | Callisto reappears from behind Jupitertakes 10 min | — |
| Jan 22 14:16 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 23 08:41 UTC | Io's shadow enters the disctakes 4 min | — |
| Jan 23 09:08 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 23 10:59 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 23 11:06 UTC | Europa's shadow enters the disctakes 7 min | — |
| Jan 23 11:26 UTC | Io's transit endstakes 4 min | — |
| Jan 23 12:02 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 23 14:01 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 23 14:54 UTC | Europa's transit endstakes 4 min | — |
| Jan 24 05:58 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 24 08:42 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 25 03:10 UTC | Io's shadow enters the disctakes 4 min | — |
| Jan 25 03:34 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 25 05:28 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 25 05:35 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Jan 25 05:52 UTC | Io's transit endstakes 4 min | — |
| Jan 25 07:37 UTC | Io eclipses Ganymede5.0 min · 26% of Ganymede covered · drops ≈0.3 mag | — |
| Jan 25 09:14 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Jan 25 10:55 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Jan 25 16:10 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Jan 26 00:26 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 26 03:08 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 26 21:38 UTC | Io's shadow enters the disctakes 4 min | — |
| Jan 26 22:00 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 26 23:56 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 27 00:18 UTC | Io's transit endstakes 4 min | — |
| Jan 27 00:25 UTC | Europa's shadow enters the disctakes 7 min | — |
| Jan 27 01:10 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 27 03:20 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 27 04:03 UTC | Europa's transit endstakes 4 min | — |
| Jan 27 18:55 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 27 21:34 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 28 16:07 UTC | Io's shadow enters the disctakes 4 min | — |
| Jan 28 16:26 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 28 18:25 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 28 18:43 UTC | Io's transit endstakes 4 min | — |
| Jan 28 18:52 UTC | Europa disappears into Jupiter's shadowtakes 4 min | — |
| Jan 28 22:21 UTC | Europa reappears from behind Jupitertakes 4 min | — |
| Jan 29 00:56 UTC | Ganymede's shadow enters the disctakes 8 min | — |
| Jan 29 02:13 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Jan 29 04:36 UTC | Ganymede's shadow leaves the disctakes 7 min | — |
| Jan 29 05:49 UTC | Ganymede's transit endstakes 8 min | — |
| Jan 29 09:47 UTC | Ganymede eclipses Io4.3 min · 23% of Io covered · drops ≈0.3 mag | — |
| Jan 29 13:24 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 29 16:00 UTC | Io reappears from behind Jupitertakes 4 min | — |
| Jan 30 10:35 UTC | Io's shadow enters the disctakes 4 min | — |
| Jan 30 10:52 UTC | Io begins its transit across the disctakes 4 min | — |
| Jan 30 12:53 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jan 30 13:08 UTC | Callisto's shadow enters the disctakes 13 min | — |
| Jan 30 13:09 UTC | Io's transit endstakes 4 min | — |
| Jan 30 13:43 UTC | Europa's shadow enters the disctakes 4 min | — |
| Jan 30 14:18 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jan 30 14:24 UTC | Callisto eclipses Europa19.4 min · 42% of Europa covered · drops ≈0.6 mag | — |
| Jan 30 15:49 UTC | Callisto begins its transit across the disctakes 10 min | — |
| Jan 30 16:37 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jan 30 17:10 UTC | Europa's transit endstakes 4 min | — |
| Jan 30 17:56 UTC | Callisto's shadow leaves the disctakes 9 min | — |
| Jan 30 20:25 UTC | Callisto's transit endstakes 10 min | — |
| Jan 31 07:52 UTC | Io disappears into Jupiter's shadowtakes 4 min | — |
| Jan 31 10:26 UTC | Io reappears from behind Jupitertakes 4 min | — |
Reading the list
Each disappears / reappears line is the moment the moon's disc is fully in or first out; the "takes N min" is how long the disc takes to cross the edge. Halves that happen behind Jupiter or inside its shadow are left out, since nobody can see them. Positions are from JPL DE431 and the jup365 satellite ephemeris, Jupiter as an oblate spheroid with its shadow cone; mutual-event magnitude drops assume uniform discs and are estimates. Events are geocentric — the same instant everywhere on Earth to well under a second.