Jupiter's moons in July 2027
Io · Europa · Ganymede · Callisto — eclipses, occultations, transits, shadows, and 2 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 |
|---|---|---|
| Jul 1 14:47 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 1 15:43 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 1 17:06 UTC | Io's transit endstakes 4 min | — |
| Jul 1 17:59 UTC | Io's shadow leaves the disctakes 6 min | — |
| Jul 1 22:55 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Jul 2 02:35 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Jul 2 02:40 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Jul 2 06:13 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Jul 2 07:50 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 2 09:38 UTC | Europa's shadow enters the disctakes 5 min | — |
| Jul 2 10:40 UTC | Europa's transit endstakes 4 min | — |
| Jul 2 12:06 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 2 12:24 UTC | Europa's shadow leaves the disctakes 7 min | — |
| Jul 2 15:17 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 3 09:17 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 3 10:11 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 3 11:36 UTC | Io's transit endstakes 4 min | — |
| Jul 3 12:27 UTC | Io's shadow leaves the disctakes 6 min | — |
| Jul 4 02:13 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Jul 4 06:36 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 4 06:53 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Jul 4 09:46 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 5 03:47 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 5 04:40 UTC | Io's shadow enters the disctakes 5 min | — |
| Jul 5 06:06 UTC | Io's transit endstakes 4 min | — |
| Jul 5 06:56 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jul 5 13:06 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Jul 5 16:38 UTC | Ganymede's shadow enters the disctakes 9 min | — |
| Jul 5 16:45 UTC | Ganymede's transit endstakes 8 min | — |
| Jul 5 20:08 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| Jul 5 20:16 UTC | Ganymede's shadow enters the disc | — |
| Jul 5 20:20 UTC | Ganymede's shadow leaves the disc | — |
| Jul 5 21:12 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 5 22:55 UTC | Europa's shadow enters the disctakes 3 min | — |
| Jul 6 00:03 UTC | Europa's transit endstakes 4 min | — |
| Jul 6 01:06 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 6 01:42 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jul 6 04:15 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 6 22:17 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 6 23:09 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 7 00:36 UTC | Io's transit endstakes 4 min | — |
| Jul 7 01:25 UTC | Io's shadow leaves the disctakes 6 min | — |
| Jul 7 15:37 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Jul 7 19:36 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 7 20:12 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Jul 7 22:43 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 8 07:04 UTC | Callisto disappears behind Jupitertakes 10 min | — |
| Jul 8 11:48 UTC | Callisto reappears from behind Jupitertakes 10 min | — |
| Jul 8 15:14 UTC | Callisto disappears into Jupiter's shadowtakes 11 min | — |
| Jul 8 16:48 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 8 17:38 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 8 19:06 UTC | Io's transit endstakes 4 min | — |
| Jul 8 19:29 UTC | Callisto reappears from Jupiter's shadowtakes 11 min | — |
| Jul 8 19:54 UTC | Io's shadow leaves the disctakes 4 min | — |
| Jul 9 03:16 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Jul 9 10:11 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Jul 9 10:35 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 9 12:13 UTC | Europa's shadow enters the disctakes 3 min | — |
| Jul 9 13:26 UTC | Europa's transit endstakes 4 min | — |
| Jul 9 14:06 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 9 14:59 UTC | Europa's shadow leaves the disctakes 6 min | — |
| Jul 9 17:12 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 10 11:18 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 10 12:06 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 10 13:36 UTC | Io's transit endstakes 4 min | — |
| Jul 10 14:23 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 11 05:01 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Jul 11 08:36 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 11 09:30 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Jul 11 11:40 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 12 05:48 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 12 06:35 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 12 08:07 UTC | Io's transit endstakes 4 min | — |
| Jul 12 08:52 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 12 17:29 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Jul 12 20:38 UTC | Ganymede's shadow enters the disctakes 9 min | — |
| Jul 12 21:07 UTC | Ganymede's transit endstakes 8 min | — |
| Jul 12 23:58 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 13 00:08 UTC | Ganymede's shadow leaves the disctakes 12 min | — |
| Jul 13 01:30 UTC | Europa's shadow enters the disctakes 5 min | — |
| Jul 13 02:48 UTC | Europa's transit endstakes 4 min | — |
| Jul 13 03:06 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 13 04:17 UTC | Europa's shadow leaves the disctakes 3 min | — |
| Jul 13 06:09 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 14 00:18 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 14 01:04 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 14 02:37 UTC | Io's transit endstakes 4 min | — |
| Jul 14 03:20 UTC | Io's shadow leaves the disctakes 3 min | — |
| Jul 14 18:26 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Jul 14 21:36 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 14 22:49 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Jul 15 00:37 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 15 18:48 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 15 19:33 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 15 21:07 UTC | Io's transit endstakes 4 min | — |
| Jul 15 21:49 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 16 07:39 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Jul 16 13:21 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 16 14:09 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Jul 16 14:47 UTC | Europa's shadow enters the disctakes 3 min | — |
| Jul 16 16:06 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 16 16:11 UTC | Europa's transit endstakes 4 min | — |
| Jul 16 17:34 UTC | Europa's shadow leaves the disctakes 6 min | — |
| Jul 16 18:30 UTC | Callisto begins its transit across the disctakes 10 min | — |
| Jul 16 19:06 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 16 23:08 UTC | Callisto's transit endstakes 10 min | — |
| Jul 17 01:21 UTC | Callisto's shadow enters the disctakes 12 min | — |
| Jul 17 05:34 UTC | Callisto's shadow leaves the disctakes 15 min | — |
| Jul 17 13:19 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 17 14:01 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 17 15:37 UTC | Io's transit endstakes 4 min | — |
| Jul 17 16:18 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 18 07:51 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Jul 18 10:37 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 18 12:07 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Jul 18 13:35 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 19 07:49 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 19 08:30 UTC | Io's shadow enters the disctakes 5 min | — |
| Jul 19 10:07 UTC | Io's transit endstakes 4 min | — |
| Jul 19 10:47 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 19 21:53 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Jul 20 00:37 UTC | Ganymede's shadow enters the disctakes 10 min | — |
| Jul 20 01:31 UTC | Ganymede's transit endstakes 8 min | — |
| Jul 20 02:45 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 20 04:05 UTC | Europa's shadow enters the disctakes 3 min | — |
| Jul 20 04:08 UTC | Ganymede's shadow leaves the disctakes 11 min | — |
| Jul 20 05:07 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 20 05:35 UTC | Europa's transit endstakes 4 min | — |
| Jul 20 06:51 UTC | Europa's shadow leaves the disctakes 5 min | — |
| Jul 20 08:03 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 21 02:19 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 21 02:59 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 21 04:38 UTC | Io's transit endstakes 4 min | — |
| Jul 21 05:16 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 21 21:16 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Jul 21 23:37 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 22 01:26 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Jul 22 02:32 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 22 20:50 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 22 21:28 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 22 23:08 UTC | Io's transit endstakes 4 min | — |
| Jul 22 23:44 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 23 12:02 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Jul 23 16:08 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 23 17:22 UTC | Europa's shadow enters the disctakes 6 min | — |
| Jul 23 18:07 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 23 18:07 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Jul 23 18:58 UTC | Europa's transit endstakes 4 min | — |
| Jul 23 20:08 UTC | Europa's shadow leaves the disctakes 6 min | — |
| Jul 23 21:00 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 24 15:20 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 24 15:56 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 24 17:38 UTC | Io's transit endstakes 4 min | — |
| Jul 24 18:13 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 25 03:24 UTC | Callisto disappears behind Jupitertakes 11 min | — |
| Jul 25 08:03 UTC | Callisto reappears from behind Jupitertakes 11 min | — |
| Jul 25 09:18 UTC | Callisto disappears into Jupiter's shadowtakes 12 min | — |
| Jul 25 10:41 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Jul 25 12:37 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 25 13:28 UTC | Callisto reappears from Jupiter's shadowtakes 12 min | — |
| Jul 25 14:44 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Jul 25 15:29 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 26 09:35 UTC | Ganymede occults Europa1.4 min · 0% of Europa covered · drops ≈0.0 mag | — |
| Jul 26 09:50 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 26 10:25 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 26 12:09 UTC | Io's transit endstakes 4 min | — |
| Jul 26 12:42 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 27 02:18 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Jul 27 04:37 UTC | Ganymede's shadow enters the disctakes 7 min | — |
| Jul 27 05:31 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 27 05:55 UTC | Ganymede's transit endstakes 8 min | — |
| Jul 27 06:39 UTC | Europa's shadow enters the disctakes 3 min | — |
| Jul 27 07:07 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 27 08:08 UTC | Ganymede's shadow leaves the disctakes 10 min | — |
| Jul 27 08:21 UTC | Europa's transit endstakes 4 min | — |
| Jul 27 09:26 UTC | Europa's shadow leaves the disctakes 5 min | — |
| Jul 27 09:57 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 27 14:44 UTC | Ganymede eclipses Europa4.4 min · 0% of Europa covered · drops ≈0.0 mag | — |
| Jul 28 04:20 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 28 04:54 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 28 06:39 UTC | Io's transit endstakes 4 min | — |
| Jul 28 07:11 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 29 00:07 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Jul 29 01:37 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 29 04:03 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Jul 29 04:26 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 29 22:51 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 29 23:23 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 30 01:09 UTC | Io's transit endstakes 4 min | — |
| Jul 30 01:40 UTC | Io's shadow leaves the disctakes 5 min | — |
| Jul 30 16:28 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Jul 30 18:55 UTC | Europa begins its transit across the disctakes 4 min | — |
| Jul 30 19:56 UTC | Europa's shadow enters the disctakes 5 min | — |
| Jul 30 20:07 UTC | Io disappears behind Jupitertakes 4 min | — |
| Jul 30 21:45 UTC | Europa's transit endstakes 4 min | — |
| Jul 30 22:05 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Jul 30 22:43 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Jul 30 22:54 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Jul 31 17:21 UTC | Io begins its transit across the disctakes 4 min | — |
| Jul 31 17:51 UTC | Io's shadow enters the disctakes 3 min | — |
| Jul 31 19:40 UTC | Io's transit endstakes 4 min | — |
| Jul 31 20:08 UTC | Io's shadow leaves the disctakes 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.