Jupiter's moons in May 2027
Io · Europa · Ganymede · Callisto — eclipses, occultations, transits, shadows, and 9 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 |
|---|---|---|
| May 1 01:55 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 1 07:19 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 1 13:00 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 1 16:33 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 1 18:41 UTC | Ganymede occults Io4.6 min · 31% of Io covered · drops ≈0.1 mag | — |
| May 1 23:36 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| May 2 02:43 UTC | Callisto disappears behind Jupitertakes 10 min | — |
| May 2 03:14 UTC | Ganymede's transit endstakes 8 min | — |
| May 2 04:43 UTC | Ganymede's shadow enters the disctakes 7 min | — |
| May 2 07:33 UTC | Callisto reappears from behind Jupitertakes 10 min | — |
| May 2 08:14 UTC | Ganymede's shadow leaves the disctakes 9 min | — |
| May 2 08:24 UTC | Ganymede's shadow enters the disc | — |
| May 2 08:28 UTC | Ganymede's shadow leaves the disc | — |
| May 2 10:07 UTC | Io begins its transit across the disctakes 4 min | — |
| May 2 11:24 UTC | Io's shadow enters the disctakes 3 min | — |
| May 2 12:25 UTC | Io's transit endstakes 4 min | — |
| May 2 13:38 UTC | Io's shadow leaves the disctakes 7 min | — |
| May 2 15:00 UTC | Callisto disappears into Jupiter's shadowtakes 11 min | — |
| May 2 19:30 UTC | Callisto reappears from Jupiter's shadowtakes 11 min | — |
| May 2 21:04 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 2 23:37 UTC | Europa's shadow enters the disctakes 3 min | — |
| May 2 23:56 UTC | Europa's transit endstakes 4 min | — |
| May 3 02:24 UTC | Europa's shadow leaves the disctakes 5 min | — |
| May 3 07:28 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 3 11:02 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 4 04:36 UTC | Io begins its transit across the disctakes 4 min | — |
| May 4 05:52 UTC | Io's shadow enters the disctakes 3 min | — |
| May 4 06:54 UTC | Io's transit endstakes 4 min | — |
| May 4 08:07 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 4 15:12 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 4 20:38 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 5 01:57 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 5 05:31 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 5 13:32 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| May 5 17:12 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| May 5 18:45 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| May 5 20:46 UTC | Io occults Ganymede2.7 min · 3% of Ganymede covered · drops ≈0.0 mag | — |
| May 5 22:20 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| May 5 23:05 UTC | Io begins its transit across the disctakes 4 min | — |
| May 6 00:21 UTC | Io's shadow enters the disctakes 3 min | — |
| May 6 01:23 UTC | Io's transit endstakes 4 min | — |
| May 6 02:36 UTC | Io's shadow leaves the disctakes 7 min | — |
| May 6 10:21 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 6 12:55 UTC | Europa's shadow enters the disctakes 3 min | — |
| May 6 13:14 UTC | Europa's transit endstakes 4 min | — |
| May 6 15:42 UTC | Europa's shadow leaves the disctakes 5 min | — |
| May 6 20:26 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 7 00:00 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 7 17:33 UTC | Io begins its transit across the disctakes 4 min | — |
| May 7 18:50 UTC | Io's shadow enters the disctakes 6 min | — |
| May 7 19:51 UTC | Io's transit endstakes 4 min | — |
| May 7 21:04 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 8 04:30 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 8 09:56 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 8 14:54 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 8 18:28 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 8 21:30 UTC | Ganymede occults Io5.0 min · 32% of Io covered · drops ≈0.1 mag | — |
| May 9 03:32 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| May 9 07:11 UTC | Ganymede's transit endstakes 8 min | — |
| May 9 08:43 UTC | Ganymede's shadow enters the disctakes 9 min | — |
| May 9 12:02 UTC | Io begins its transit across the disctakes 4 min | — |
| May 9 12:14 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| May 9 12:23 UTC | Ganymede's shadow enters the disc | — |
| May 9 12:27 UTC | Ganymede's shadow leaves the disc | — |
| May 9 13:19 UTC | Io's shadow enters the disctakes 3 min | — |
| May 9 14:20 UTC | Io's transit endstakes 4 min | — |
| May 9 15:33 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 9 23:39 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 10 02:13 UTC | Europa's shadow enters the disctakes 3 min | — |
| May 10 02:31 UTC | Europa's transit endstakes 4 min | — |
| May 10 05:00 UTC | Europa's shadow leaves the disctakes 5 min | — |
| May 10 09:23 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 10 12:57 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 10 13:10 UTC | Callisto begins its transit across the disctakes 10 min | — |
| May 10 17:56 UTC | Callisto's transit endstakes 10 min | — |
| May 11 01:15 UTC | Callisto's shadow enters the disctakes 11 min | — |
| May 11 05:40 UTC | Callisto's shadow leaves the disctakes 10 min | — |
| May 11 05:52 UTC | Callisto's shadow enters the disc | — |
| May 11 05:57 UTC | Callisto's shadow leaves the disc | — |
| May 11 06:31 UTC | Io begins its transit across the disctakes 4 min | — |
| May 11 07:48 UTC | Io's shadow enters the disctakes 3 min | — |
| May 11 08:49 UTC | Io's transit endstakes 4 min | — |
| May 11 10:02 UTC | Io's shadow leaves the disctakes 8 min | — |
| May 11 17:48 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 11 23:14 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 12 03:52 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 12 07:26 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 12 17:31 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| May 12 21:12 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| May 12 22:45 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| May 12 23:32 UTC | Io occults Ganymede1.9 min · 0% of Ganymede covered · drops ≈0.0 mag | — |
| May 13 01:00 UTC | Io begins its transit across the disctakes 4 min | — |
| May 13 02:16 UTC | Io's shadow enters the disctakes 3 min | — |
| May 13 02:20 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| May 13 03:18 UTC | Io's transit endstakes 4 min | — |
| May 13 04:31 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 13 12:58 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 13 15:31 UTC | Europa's shadow enters the disctakes 3 min | — |
| May 13 15:50 UTC | Europa's transit endstakes 4 min | — |
| May 13 18:18 UTC | Europa's shadow leaves the disctakes 8 min | — |
| May 13 22:21 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 14 01:55 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 14 19:29 UTC | Io begins its transit across the disctakes 4 min | — |
| May 14 20:45 UTC | Io's shadow enters the disctakes 3 min | — |
| May 14 21:47 UTC | Io's transit endstakes 4 min | — |
| May 14 23:00 UTC | Io's shadow leaves the disctakes 7 min | — |
| May 15 07:07 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 15 12:33 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 15 16:50 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 15 20:23 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 16 00:26 UTC | Ganymede occults Io5.6 min · 35% of Io covered · drops ≈0.2 mag | — |
| May 16 07:33 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| May 16 11:12 UTC | Ganymede's transit endstakes 8 min | — |
| May 16 12:42 UTC | Ganymede's shadow enters the disctakes 10 min | — |
| May 16 13:58 UTC | Io begins its transit across the disctakes 4 min | — |
| May 16 15:14 UTC | Io's shadow enters the disctakes 6 min | — |
| May 16 16:12 UTC | Ganymede's shadow leaves the disctakes 9 min | — |
| May 16 16:16 UTC | Io's transit endstakes 4 min | — |
| May 16 16:22 UTC | Ganymede's shadow enters the disc | — |
| May 16 16:26 UTC | Ganymede's shadow leaves the disc | — |
| May 16 17:29 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 17 02:16 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 17 04:49 UTC | Europa's shadow enters the disctakes 3 min | — |
| May 17 05:08 UTC | Europa's transit endstakes 4 min | — |
| May 17 07:36 UTC | Europa's shadow leaves the disctakes 8 min | — |
| May 17 11:19 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 17 14:52 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 18 08:27 UTC | Io begins its transit across the disctakes 4 min | — |
| May 18 09:43 UTC | Io's shadow enters the disctakes 3 min | — |
| May 18 10:45 UTC | Io's transit endstakes 4 min | — |
| May 18 11:57 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 18 20:26 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 18 20:48 UTC | Callisto disappears behind Jupitertakes 10 min | — |
| May 19 01:38 UTC | Callisto reappears from behind Jupitertakes 10 min | — |
| May 19 01:51 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 19 05:48 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 19 09:04 UTC | Callisto disappears into Jupiter's shadowtakes 11 min | — |
| May 19 09:21 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 19 13:31 UTC | Callisto reappears from Jupiter's shadowtakes 11 min | — |
| May 19 21:34 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| May 20 01:14 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| May 20 02:44 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| May 20 02:56 UTC | Io begins its transit across the disctakes 4 min | — |
| May 20 04:12 UTC | Io's shadow enters the disctakes 3 min | — |
| May 20 05:14 UTC | Io's transit endstakes 4 min | — |
| May 20 06:19 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| May 20 06:26 UTC | Io's shadow leaves the disctakes 7 min | — |
| May 20 15:36 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 20 18:07 UTC | Europa's shadow enters the disctakes 3 min | — |
| May 20 18:28 UTC | Europa's transit endstakes 4 min | — |
| May 20 20:53 UTC | Europa's shadow leaves the disctakes 4 min | — |
| May 21 00:17 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 21 03:49 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 21 21:25 UTC | Io begins its transit across the disctakes 4 min | — |
| May 21 22:40 UTC | Io's shadow enters the disctakes 3 min | — |
| May 21 23:43 UTC | Io's transit endstakes 4 min | — |
| May 22 00:55 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 22 09:46 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 22 15:09 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 22 18:46 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 22 22:18 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 23 03:32 UTC | Ganymede occults Io6.5 min · 34% of Io covered · drops ≈0.2 mag | — |
| May 23 11:39 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| May 23 15:17 UTC | Ganymede's transit endstakes 8 min | — |
| May 23 15:54 UTC | Io begins its transit across the disctakes 4 min | — |
| May 23 16:42 UTC | Ganymede's shadow enters the disctakes 9 min | — |
| May 23 17:09 UTC | Io's shadow enters the disctakes 3 min | — |
| May 23 18:12 UTC | Io's transit endstakes 4 min | — |
| May 23 19:24 UTC | Io's shadow leaves the disctakes 7 min | — |
| May 23 20:12 UTC | Ganymede's shadow leaves the disctakes 9 min | — |
| May 23 20:22 UTC | Ganymede's shadow enters the disc | — |
| May 23 20:26 UTC | Ganymede's shadow leaves the disc | — |
| May 24 04:55 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 24 07:25 UTC | Europa's shadow enters the disctakes 3 min | — |
| May 24 07:47 UTC | Europa's transit endstakes 4 min | — |
| May 24 10:11 UTC | Europa's shadow leaves the disctakes 4 min | — |
| May 24 13:15 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 24 16:47 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 25 10:23 UTC | Io begins its transit across the disctakes 4 min | — |
| May 25 11:38 UTC | Io's shadow enters the disctakes 6 min | — |
| May 25 12:41 UTC | Io's transit endstakes 4 min | — |
| May 25 13:53 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 25 23:06 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 26 04:28 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 26 07:44 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 26 11:16 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 27 01:40 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| May 27 04:53 UTC | Io begins its transit across the disctakes 4 min | — |
| May 27 05:20 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| May 27 06:07 UTC | Io's shadow enters the disctakes 3 min | — |
| May 27 06:43 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| May 27 07:11 UTC | Io's transit endstakes 4 min | — |
| May 27 07:37 UTC | Callisto begins its transit across the disctakes 10 min | — |
| May 27 08:22 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 27 10:17 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| May 27 12:23 UTC | Callisto's transit endstakes 10 min | — |
| May 27 18:15 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 27 19:17 UTC | Callisto's shadow enters the disctakes 11 min | — |
| May 27 20:43 UTC | Europa's shadow enters the disctakes 3 min | — |
| May 27 21:07 UTC | Europa's transit endstakes 4 min | — |
| May 27 23:29 UTC | Europa's shadow leaves the disctakes 4 min | — |
| May 27 23:38 UTC | Callisto's shadow leaves the disctakes 11 min | — |
| May 27 23:51 UTC | Callisto's shadow enters the disc | — |
| May 27 23:56 UTC | Callisto's shadow leaves the disc | — |
| May 28 02:14 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 28 05:44 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 28 23:22 UTC | Io begins its transit across the disctakes 4 min | — |
| May 29 00:36 UTC | Io's shadow enters the disctakes 3 min | — |
| May 29 01:40 UTC | Io's transit endstakes 4 min | — |
| May 29 02:50 UTC | Io's shadow leaves the disctakes 7 min | — |
| May 29 12:27 UTC | Europa disappears behind Jupitertakes 4 min | — |
| May 29 17:46 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| May 29 20:43 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 30 00:13 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| May 30 06:52 UTC | Ganymede occults Io8.1 min · 31% of Io covered · drops ≈0.1 mag | — |
| May 30 15:47 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| May 30 17:51 UTC | Io begins its transit across the disctakes 4 min | — |
| May 30 19:04 UTC | Io's shadow enters the disctakes 3 min | — |
| May 30 19:26 UTC | Ganymede's transit endstakes 8 min | — |
| May 30 20:10 UTC | Io's transit endstakes 4 min | — |
| May 30 20:42 UTC | Ganymede's shadow enters the disctakes 10 min | — |
| May 30 21:16 UTC | Ganymede occults Io24.8 min · 67% of Io covered · drops ≈0.3 mag | — |
| May 30 21:19 UTC | Io's shadow leaves the disctakes 4 min | — |
| May 31 00:12 UTC | Ganymede's shadow leaves the disctakes 14 min | — |
| May 31 04:31 UTC | Ganymede occults Io12.5 min · 16% of Io covered · drops ≈0.1 mag | — |
| May 31 07:35 UTC | Europa begins its transit across the disctakes 4 min | — |
| May 31 10:00 UTC | Europa's shadow enters the disctakes 5 min | — |
| May 31 10:27 UTC | Europa's transit endstakes 4 min | — |
| May 31 12:46 UTC | Europa's shadow leaves the disctakes 5 min | — |
| May 31 15:12 UTC | Io disappears behind Jupitertakes 4 min | — |
| May 31 18:42 UTC | Io reappears from Jupiter's shadowtakes 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.