Jupiter's moons in April 2027
Io · Europa · Ganymede · Callisto — eclipses, occultations, transits, shadows, and 7 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 |
|---|---|---|
| Apr 1 00:43 UTC | Europa's transit endstakes 4 min | — |
| Apr 1 02:44 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Apr 1 11:05 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 1 14:25 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 2 08:13 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 2 09:15 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 2 10:31 UTC | Io's transit endstakes 4 min | — |
| Apr 2 11:30 UTC | Io's shadow leaves the disctakes 6 min | — |
| Apr 2 15:58 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Apr 2 20:55 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Apr 3 05:32 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 3 08:31 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Apr 3 08:53 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 3 12:09 UTC | Ganymede's transit endstakes 8 min | — |
| Apr 3 12:46 UTC | Ganymede's shadow enters the disctakes 10 min | — |
| Apr 3 16:18 UTC | Ganymede's shadow leaves the disctakes 14 min | — |
| Apr 4 02:40 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 4 03:44 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 4 04:58 UTC | Io's transit endstakes 4 min | — |
| Apr 4 05:59 UTC | Io's shadow leaves the disctakes 6 min | — |
| Apr 4 11:03 UTC | Europa begins its transit across the disctakes 4 min | — |
| Apr 4 13:12 UTC | Europa's shadow enters the disctakes 5 min | — |
| Apr 4 13:55 UTC | Europa's transit endstakes 4 min | — |
| Apr 4 16:01 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Apr 5 00:00 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 5 03:22 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 5 21:07 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 5 22:12 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 5 23:25 UTC | Io's transit endstakes 4 min | — |
| Apr 6 00:27 UTC | Io's shadow leaves the disctakes 4 min | — |
| Apr 6 05:11 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Apr 6 10:13 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Apr 6 18:27 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 6 21:51 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 6 22:17 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Apr 7 01:57 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Apr 7 02:46 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Apr 7 02:50 UTC | Callisto begins its transit across the disctakes 10 min | — |
| Apr 7 06:22 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Apr 7 07:34 UTC | Callisto's transit endstakes 10 min | — |
| Apr 7 09:41 UTC | Io occults Ganymede3.6 min · 2% of Ganymede covered · drops ≈0.0 mag | — |
| Apr 7 13:11 UTC | Callisto's shadow enters the disctakes 11 min | — |
| Apr 7 15:35 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 7 16:41 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 7 17:42 UTC | Callisto's shadow leaves the disctakes 11 min | — |
| Apr 7 17:53 UTC | Io's transit endstakes 4 min | — |
| Apr 7 17:54 UTC | Callisto's shadow enters the disc | — |
| Apr 7 17:59 UTC | Callisto's shadow leaves the disc | — |
| Apr 7 18:56 UTC | Io's shadow leaves the disctakes 6 min | — |
| Apr 8 00:16 UTC | Europa begins its transit across the disctakes 4 min | — |
| Apr 8 02:31 UTC | Europa's shadow enters the disctakes 3 min | — |
| Apr 8 03:09 UTC | Europa's transit endstakes 4 min | — |
| Apr 8 05:19 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Apr 8 12:55 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 8 16:20 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 9 10:03 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 9 11:10 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 9 12:20 UTC | Io's transit endstakes 4 min | — |
| Apr 9 13:25 UTC | Io's shadow leaves the disctakes 6 min | — |
| Apr 9 18:24 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Apr 9 23:30 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Apr 10 07:23 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 10 10:41 UTC | Ganymede occults Io2.6 min · 4% of Io covered · drops ≈0.0 mag | — |
| Apr 10 10:48 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 10 12:10 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Apr 10 15:48 UTC | Ganymede's transit endstakes 8 min | — |
| Apr 10 16:45 UTC | Ganymede's shadow enters the disctakes 7 min | — |
| Apr 10 20:18 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| Apr 10 20:27 UTC | Ganymede's shadow enters the disc | — |
| Apr 10 20:31 UTC | Ganymede's shadow leaves the disc | — |
| Apr 11 04:30 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 11 05:39 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 11 06:48 UTC | Io's transit endstakes 4 min | — |
| Apr 11 07:53 UTC | Io's shadow leaves the disctakes 4 min | — |
| Apr 11 13:30 UTC | Europa begins its transit across the disctakes 4 min | — |
| Apr 11 15:49 UTC | Europa's shadow enters the disctakes 3 min | — |
| Apr 11 16:22 UTC | Europa's transit endstakes 4 min | — |
| Apr 11 18:37 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Apr 12 01:50 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 12 05:17 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 12 22:58 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 13 00:07 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 13 01:16 UTC | Io's transit endstakes 4 min | — |
| Apr 13 02:22 UTC | Io's shadow leaves the disctakes 7 min | — |
| Apr 13 07:38 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Apr 13 12:49 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Apr 13 20:18 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 13 23:46 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 14 01:59 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Apr 14 05:39 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Apr 14 06:46 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Apr 14 10:21 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Apr 14 12:28 UTC | Io occults Ganymede3.6 min · 3% of Ganymede covered · drops ≈0.0 mag | — |
| Apr 14 17:26 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 14 18:36 UTC | Io's shadow enters the disctakes 5 min | — |
| Apr 14 19:44 UTC | Io's transit endstakes 4 min | — |
| Apr 14 20:51 UTC | Io's shadow leaves the disctakes 4 min | — |
| Apr 15 02:44 UTC | Europa begins its transit across the disctakes 4 min | — |
| Apr 15 05:07 UTC | Europa's shadow enters the disctakes 3 min | — |
| Apr 15 05:37 UTC | Europa's transit endstakes 4 min | — |
| Apr 15 07:55 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Apr 15 09:33 UTC | Callisto disappears behind Jupitertakes 10 min | — |
| Apr 15 14:21 UTC | Callisto reappears from behind Jupitertakes 10 min | — |
| Apr 15 14:46 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 15 18:15 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 15 20:56 UTC | Callisto disappears into Jupiter's shadowtakes 10 min | — |
| Apr 16 01:30 UTC | Callisto reappears from Jupiter's shadowtakes 10 min | — |
| Apr 16 11:53 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 16 13:05 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 16 14:11 UTC | Io's transit endstakes 4 min | — |
| Apr 16 15:19 UTC | Io's shadow leaves the disctakes 4 min | — |
| Apr 16 20:52 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Apr 17 02:06 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Apr 17 09:14 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 17 12:43 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 17 13:17 UTC | Ganymede occults Io3.5 min · 14% of Io covered · drops ≈0.1 mag | — |
| Apr 17 15:55 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Apr 17 19:33 UTC | Ganymede's transit endstakes 8 min | — |
| Apr 17 20:45 UTC | Ganymede's shadow enters the disctakes 7 min | — |
| Apr 18 00:16 UTC | Ganymede's shadow leaves the disctakes 9 min | — |
| Apr 18 00:26 UTC | Ganymede's shadow enters the disc | — |
| Apr 18 00:30 UTC | Ganymede's shadow leaves the disc | — |
| Apr 18 06:21 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 18 07:34 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 18 08:39 UTC | Io's transit endstakes 4 min | — |
| Apr 18 09:48 UTC | Io's shadow leaves the disctakes 7 min | — |
| Apr 18 15:59 UTC | Europa begins its transit across the disctakes 4 min | — |
| Apr 18 18:25 UTC | Europa's shadow enters the disctakes 3 min | — |
| Apr 18 18:52 UTC | Europa's transit endstakes 4 min | — |
| Apr 18 21:13 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Apr 19 03:42 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 19 07:12 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 20 00:49 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 20 02:02 UTC | Io's shadow enters the disctakes 5 min | — |
| Apr 20 03:07 UTC | Io's transit endstakes 4 min | — |
| Apr 20 04:17 UTC | Io's shadow leaves the disctakes 4 min | — |
| Apr 20 10:07 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Apr 20 15:25 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Apr 20 22:10 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 21 01:41 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 21 05:45 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Apr 21 09:25 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Apr 21 10:45 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Apr 21 14:21 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Apr 21 15:15 UTC | Io occults Ganymede3.5 min · 4% of Ganymede covered · drops ≈0.0 mag | — |
| Apr 21 19:18 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 21 20:31 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 21 21:35 UTC | Io's transit endstakes 4 min | — |
| Apr 21 22:46 UTC | Io's shadow leaves the disctakes 7 min | — |
| Apr 22 05:15 UTC | Europa begins its transit across the disctakes 4 min | — |
| Apr 22 07:43 UTC | Europa's shadow enters the disctakes 3 min | — |
| Apr 22 08:07 UTC | Europa's transit endstakes 4 min | — |
| Apr 22 10:31 UTC | Europa's shadow leaves the disctakes 4 min | — |
| Apr 22 16:38 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 22 20:10 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 23 13:46 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 23 15:00 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 23 16:04 UTC | Io's transit endstakes 4 min | — |
| Apr 23 17:14 UTC | Io's shadow leaves the disctakes 7 min | — |
| Apr 23 19:32 UTC | Callisto begins its transit across the disctakes 10 min | — |
| Apr 23 23:22 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Apr 24 00:17 UTC | Callisto's transit endstakes 10 min | — |
| Apr 24 04:43 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Apr 24 07:12 UTC | Callisto's shadow enters the disctakes 11 min | — |
| Apr 24 11:06 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 24 11:40 UTC | Callisto's shadow leaves the disctakes 11 min | — |
| Apr 24 11:53 UTC | Callisto's shadow enters the disc | — |
| Apr 24 11:58 UTC | Callisto's shadow leaves the disc | — |
| Apr 24 14:38 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 24 15:57 UTC | Ganymede occults Io4.1 min · 23% of Io covered · drops ≈0.1 mag | — |
| Apr 24 19:43 UTC | Ganymede begins its transit across the disctakes 8 min | — |
| Apr 24 23:22 UTC | Ganymede's transit endstakes 8 min | — |
| Apr 25 00:44 UTC | Ganymede's shadow enters the disctakes 9 min | — |
| Apr 25 04:16 UTC | Ganymede's shadow leaves the disctakes 8 min | — |
| Apr 25 04:25 UTC | Ganymede's shadow enters the disc | — |
| Apr 25 04:29 UTC | Ganymede's shadow leaves the disc | — |
| Apr 25 08:14 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 25 09:29 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 25 10:32 UTC | Io's transit endstakes 4 min | — |
| Apr 25 11:43 UTC | Io's shadow leaves the disctakes 4 min | — |
| Apr 25 18:30 UTC | Europa begins its transit across the disctakes 4 min | — |
| Apr 25 21:01 UTC | Europa's shadow enters the disctakes 3 min | — |
| Apr 25 21:23 UTC | Europa's transit endstakes 4 min | — |
| Apr 25 23:48 UTC | Europa's shadow leaves the disctakes 5 min | — |
| Apr 26 05:35 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 26 09:07 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 27 02:42 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 27 03:57 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 27 05:00 UTC | Io's transit endstakes 4 min | — |
| Apr 27 06:12 UTC | Io's shadow leaves the disctakes 7 min | — |
| Apr 27 12:38 UTC | Europa disappears behind Jupitertakes 4 min | — |
| Apr 27 18:01 UTC | Europa reappears from Jupiter's shadowtakes 4 min | — |
| Apr 28 00:03 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 28 03:36 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 28 09:37 UTC | Ganymede disappears behind Jupitertakes 8 min | — |
| Apr 28 13:17 UTC | Ganymede reappears from behind Jupitertakes 8 min | — |
| Apr 28 14:45 UTC | Ganymede disappears into Jupiter's shadowtakes 8 min | — |
| Apr 28 18:00 UTC | Io occults Ganymede3.2 min · 4% of Ganymede covered · drops ≈0.0 mag | — |
| Apr 28 18:21 UTC | Ganymede reappears from Jupiter's shadowtakes 8 min | — |
| Apr 28 21:11 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 28 22:26 UTC | Io's shadow enters the disctakes 5 min | — |
| Apr 28 23:29 UTC | Io's transit endstakes 4 min | — |
| Apr 29 00:41 UTC | Io's shadow leaves the disctakes 4 min | — |
| Apr 29 07:47 UTC | Europa begins its transit across the disctakes 4 min | — |
| Apr 29 10:19 UTC | Europa's shadow enters the disctakes 3 min | — |
| Apr 29 10:39 UTC | Europa's transit endstakes 4 min | — |
| Apr 29 13:06 UTC | Europa's shadow leaves the disctakes 5 min | — |
| Apr 29 18:31 UTC | Io disappears behind Jupitertakes 4 min | — |
| Apr 29 22:05 UTC | Io reappears from Jupiter's shadowtakes 4 min | — |
| Apr 30 15:39 UTC | Io begins its transit across the disctakes 4 min | — |
| Apr 30 16:55 UTC | Io's shadow enters the disctakes 3 min | — |
| Apr 30 17:57 UTC | Io's transit endstakes 4 min | — |
| Apr 30 19:09 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.